A1-H57BC-WDM-000 (Wiring Diagrams).pdf

A1-H57BC-WDM-000

12 OCTOBER 2018

TECHNICAL MANUAL

ORGANIZATIONAL MAINTENANCE

WIRING DIAGRAMS

NAVY MODEL

TH-57B AND TH-57C

DISTRIBUTION STATEMENT C - Distribution authorized to U.S. Government agencies and their contractors to protect publications required for official use or for administrative or operational purposes only (1 January 2016). Other requests for this document shall be referred to Commander, Naval Air Systems Command (PMA-273), 47123 Buse Rd, Bldg 2272, Patuxent River, MD 20670-1547.

DESTRUCTION NOTICE - For unclassified, limited documents, destroy by any method that will prevent disclosure of contents or reconstruction of the document.

PUBLISHED BY DIRECTION OF COMMANDER, NAVAL AIR SYSTEMS COMMAND

Change 5 - 26 March 2024

-=c;;, NAVY

0801LP0028992

Page A

NUMERICAL INDEX OF EFFECTIVE PAGES

List of Current Changes

Only those work packages/pages assigned to the manual are listed in this index. If changed work packages or pages are issued, insert the changed work package/pages and dispose of the superseded work packages/pages including classified data, in accordance with applicable regulations. The portion of text affected by the change is indicated by change bars in the outer text margin. Changes to illustrations are indicated by pointing hands or the use of the words “MAJOR CHANGE” enclosed in a box, as applicable. A change bar adjacent to an illustration figure title indicates that only the title of the illustration has changed.

Total number of pages assigned to this manual is 188 consisting of the following:

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A1-H57BC-WDM-000 TPDR-1/(TPDR-2 Blank)

ORGANIZATIONAL MAINTENANCE

LIST OF TECHNICAL PUBLICATION DEFICIENCY REPORTS INCORPORATED

WIRING DIAGRAMS

1. Deficiencies identified in this Technical Manual shall be submitted via https://jdrs.mil/.

2. The TPDRs listed below have been incorporated in this issue.

IDENTIFICATION NUMBER/

QA SEQUENCE NUMBER LOCATION

N52813-23-0033 23-40-00 23-40-00A 23-40-02 23-40-02A 23-40-03 23-40-03A 24-60-01 24-60-01A 24-60-02 24-60-02A

A1-H57BC-WDM-000 001 00

ORGANIZATIONAL MAINTENANCE

ALPHABETICAL INDEX

WIRING DIAGRAMS

WP

Title Number

Air Conditioning

Air Conditioning Electrical Installation Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-00-00

Auto Flight

Flight Control/MINISTAB System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-00

Flight Control/MINISTAB System Wiring Diagram (Yaw) (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . 22-00-01

MINISTAB Yaw Option Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-02

Cyclic Force Trim Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-03

Cyclic Stick Grip Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-04

Cargo and Accessory Compartments

Cargo Hook Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-00-00

Communications

AN/ARC-159 UHF COMM 1 System Wiring Diagram (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-00

KFS 599 UHF COMM 1 System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-01

KX-155 VHF COMM 2 System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-02

KY-196 COMM 2 System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-03

C6533/ARC Intercommunication System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . 23-40-00

C6533/ARC Intercommunication System Wiring Diagram (TH-57B) After AFC-43 - Deleted. . . . . 23-40-00A

KMA-24H Audio/ICS Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-01

PAC-24 Audio/ICS Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-01A

Tone Generator Wiring Diagram (TH-57B) Before AFC-43 - Deleted. . . . . . . . . . . . . . . . . . . . . . . 23-40-02

Tone Generator Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-02A

Tone Generator Wiring Diagram (TH-57C) - Before AFC-44 - Deleted . . . . . . . . . . . . . . . . . . . . . 23-40-03

Tone Generator Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-03A

Crew Headset Cord Wiring Diagram Before AFC-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-04

Crew Headset Cord Wiring Diagram After AFC-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-04A

Change 5 - 26 March 2024

I I

I I I

Electrical Power

Electrical Power System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-00

Electrical System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-01

Voltmeter Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-02

Buss Switching Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-03

Power Distribution (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-00

Bus Distribution (TH-57C) - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-01

Bus Distribution (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-01A

Lower Circuit Breaker Panel (TH-57C) - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-02

Lower Circuit Breaker Panel (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-02A

Engine Indicating

Turbine Outlet Temperature Indicator Circuit (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-00

Turbine Outlet Temperature Indicator Circuit (TH-57C W/O NVIS) . . . . . . . . . . . . . . . . . . . . . . . . 77-00-01

Turbine Outlet Temperature Indicator Circuit (TH-57C NVIS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-02

Turbine Outlet Temperature Outline Pin Out Drawing with NVIS . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-03

Torque Indicator w/NVIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-04

Torque Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-05

Fire Protection

Engine Fire Detection Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-10-00

Fuel

Fuel Quantity Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-00

Low Fuel Warning Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-01

Fuel Pump Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-02

Hydraulic

Hydraulic Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-00-00

Hydraulic Pressure Low Warning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30-00

Indicating/Recording Systems

Auto Fault Chip Detector Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-00-00

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Effectivity Notations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

WP

Title Number

Change 5 - 26 March 2024

I I

Historical Record of Applicable Technical Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Interim Rapid Action Changes (IRAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Manual Issue Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Nonstandard Terms, Symbols and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Reference Designator List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Requisition and Automatic Distribution of NAVAIR Technical Publications . . . . . . . . . . . . . . . . . . 002 00

Symbology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Technical Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Technical Publications Deficiency Report (TPDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Wiring Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Wiring Diagram Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 002 00

Lights

Lighting Circuits Wiring Diagram (TH-57C) Before AFC-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-00

Lighting Circuits Wiring Diagram (TH-57C) After AFC-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-00A

Lighting Circuits (TH-57C) After AFC-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-01A

Simplified Interior Lighting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-02

Night Vision Information System Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-03

Night Flying System Wiring Diagram (Overhead Console) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-04

Caution Panel/Dimming Circuits Interconnect Wiring Diagram Before AFC-44 - Deleted. . . . . . . . 33-10-00

Caution Panel/Dimming Circuits Interconnect Wiring Diagram After AFC-44 . . . . . . . . . . . . . . . . . 33-10-00A

Duct Temp High Indicator Segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-10-01

Annunciator Dimming Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-10-02

Cockpit Lights Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-10-03

Anti-Collision Light Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-40-00

Searchlight Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-40-01

Navigation Position Lights Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-40-02

Landing Light Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-40-03

WP

Title Number

Navigation

Navigation and Navigational Aids System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . 34-00-00

Navigation and Navigational Aids System Wiring Diagram (TH-57B) After AFC-43 - Deleted . . . . 34-00-00A

Navigation and Navigational Aids System Wiring Diagram Before AFC-44 - Deleted . . . . . . . . . . 34-00-01

GTN-650 COMM/NAV/GPS with GTX-33 Transponder and GDL-88 Datalink System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-00-02

GTN-650 COMM/NAV/GPS with GTX-33 Transponder and GDL-88 Datalink System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-00-03

KRA-405 Radar Altimeter System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-01

KRA-405B Radar Altimeter System Wiring Diagram (TH-57B) Before AFC-43 - Deleted . . . . . . . 34-20-01A

KRA-405B Radar Altimeter System Wiring Diagram (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-01B

KRA-405 Radar Altimeter System Wiring Diagram (TH-57C) - Deleted . . . . . . . . . . . . . . . . . . . . . 34-20-02

KRA-405B Radar Altimeter System Wiring Diagram (TH-57C) Before AFC-44 - Deleted . . . . . . . 34-20-02A

KRA-405B Radar Altimeter System Wiring Diagram (TH-57C). . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-02B

KT-79 Transponder and Blind Encoder Wiring Diagram - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-03

Marker Beacon Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-04

KLN 900 GPS with Autopilot Wiring Diagram - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-20-05

Numerical Index of Reference Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 003 00

Wiring Diagram Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 004 00

WP

Title Number

A1-H57BC-WDM-000 002 00

ORGANIZATIONAL MAINTENANCE

INTRODUCTION

WIRING DIAGRAMS

1. PURPOSE AND SCOPE.

2. This manual contains diagrams of instrument, electrical, and flight control/MINISTAB systems of the TH-57B and TH-57C helicopter. This manual is used in conjunction with TH-57 Maintenance Supplemental Manual (MSM) and Illustrated Parts Breakdown (IPB).

3. To find a general subject, refer to the list of work packages located in Alphabetical Index (WP 001 00) of this manual. To find a specific subject refer to the Subject Index

4. The wiring diagrams provided in this manual supplement the helicopter manufacturer's maintenance manual. All helicopter manufacturers’ maintenance manual procedures should be strictly adhered to.

5. Since modifications may change systems interface, operating characteristics, and fatigue lives, Original Equipment Manufacturer (OEM) provided maintenance criteria may be invalid for the modified helicopter.

6. REQUISITION AND AUTOMATIC

DISTRIBUTION OF NAVAIR TECHNICAL

PUBLICATIONS.

7. Procedures to be used by Naval Activities and other Department of Defense activities requiring NAVAIR technical manuals are defined in NAVAIR 00- 25-100 and NAVAIRINST 5605.5.4A.

8. To automatically receive future changes and revisions to NAVAIR technical manuals, an activity must be established on the Automatic Distribution Requirements List (ADRL) maintained by the Naval Air Technical Data and Engineering Service Command (NATEC). To become established on the ADRL, tell your activity central technical publications librarian. If your activity does not have a library, you may establish your automatic distribution requirements by contacting the Commanding Officer, NATEC, Attn: Distribution, NAS North Island, Bldg. 90, P.O. Box 357031, San Diego CA 92135-7031. Each year, a reconfirmation of these requirements are required to remain on automatic distribution. Please use your NATEC assigned account number when referring to automatic distribution requirements.

9. If more or replacement copies of this manual are required with no attendant changes in the ADRL, they may be ordered by submitting a MILSTRIP requisition in accordance with NAVSUP 485 to Routing Identifier Code “NFZ”. MILSTRIP requisitions can be submitted through your supply office, Navy message, or SALTS to DAAS (Defense Automated Address System), or through the DASS or NAVSUP web sites. For assistance with a MILSTRIP requisition, contact the Naval Inventory Control Point (NAVICP) Publications and Forms Customer Service at DSN 442-2626 or

(215) 697-2626, Monday through Friday, 0700 to 1600 Eastern Time.

10. MANUAL ISSUE DATE.

11. The date on the title page is the copy freeze date. No additions, deletions, or changes are made after the manual issue date, except last minute safety of flight or required maintenance changes. Data collected after the manual issue date will be included in later changes or revisions of the manual.

12. CONTENT.

13. The wiring diagram manual contains an Alphabetical Index, Introduction, Numerical Index of Reference Designators, Subject Index and Wiring Diagrams in work package (WP) format. The manual provides specific examples of methods for use of the manual and explanations of the format used.

14. The Alphabetical Index (WP 001 00) provides an alphabetical index of the material covered in this manual.

15. The Introduction (WP 002 00) explains the wiring uses and restrictions used in the manual. The introduction also contains an explanation of the wire numbering system and the wire specifications used, wiring diagram information, effectivity notations, an explanation on how to use this manual and a Subject Index. The Subject Index (Table 2) is provided to assist in locating a specific subject.

16. The Numerical Index of Reference Designation (WP 003 00) is an alphanumeric list containing reference designations, WRA switch, ground terminal block, splice area and connector in the aircraft. The index identifies the wiring diagram number, nomenclature and the drawing number that contains the item and all its termination points.

17. The Wiring Diagrams section (WP 004 00) provides complete aircraft wiring of all connections, splices, shielding, etc., between components. Internal wiring of components is found in associated systems maintenance manuals.

18. EFFECTIVITY NOTATIONS.

19. Effectivity notations are required only when data presented in the body of the manual is not applicable to all aircraft affected by the publication. These differences may be the result of model configuration, engineering changes incorporated in production, or modifications incorporated by Technical Directives.

Effectivity notations limit aircraft or equipment configuration by aircraft serial number and Technical Directive number when applicable.

20. Effectivity notations may be in the form of USN serial number.

21. When the effectivity of a complete drawing differs from the publication, the effectivity will be noted.

When the effectivity of one or more sheets of a multi-sheet drawing differs from the publication’s, the effectivity of each sheet will be noted on each page.

When the effectivity of a particular item of information differs from that of the drawing, the difference is indicated by a numerical flag note explained under

NOTE.

22. When a notation is made to a drawing, a legend is created for that specific drawing.

23. TECHINCAL DIRECTIVES.

24. Technical directives are documents which provide instructions to incorporate and record retrofit configuration modifications or inspection instructions to delivered aircraft or aircraft components.

25. AIRFRAME CHANGE (AFC). Technical directives which change configuration of aircraft structure or equipment installation, i.e. AFC, will list aircraft bureau numbers in effectivity notes and show before and after the AFC.

26. AIRCRAFT COMPONENT CHANGES.

Technical directives which change configuration of aircraft components are listed below:

AAC - Aviation Armament Change for armament equipment

ACC - Aircrew Systems Change for aircrew survival equipment

AVC - Avionics Change for airborne electronic equipment, including wiring changes

AYC - Accessory Change for mechanical

27. WIRING DIAGRAMS.

28. To facilitate locating components and tracing the circuitry of individual diagrams, each wire is identified by the wire code it bears in the aircraft. The diagrams show the terminals, wire numbers, switches, etc., in a manner which will make the location of each component easily understandable. The circuits are shown consistent with the position of switches and conditions noted on the diagrams.

29. NOTES.

Use of an underline below a pin letter denotes a lower case letter.

All wires are white unless otherwise noted.

All switches are shown in “off” position unless otherwise noted.

Installation shall be in accordance with specifications AS50881( ), Wiring Aerospace Vehicle and NAVAIR 01-1A-505, Aircraft Electric and Electronic Wiring Installation Practices.

This drawing contains wiring diagrams only. Do not order parts from this drawing. See applicable Illustrated Parts Breakdown (IPB).

30. WIRING DIAGRAM NUMBERING.

31. TH-57 wiring diagram numbering format consists of a series of three 2 digit numbers arranged as follows:

a. System Number. Identifies the Type of System shown on the drawing. The System Number is also the WP/Chapter numbers in WP 004 00.

b. Sub System Number. A Sub System breaks each System into smaller detailed sections.

c. Section Number. A Section Number breaks each Sub System into separate sections.

32. NONSTANDARD TERMS, SYMBOLS AND

ABBREVIATIONS.

33. There are no nonstandard terms, symbols and abbreviations used in this manual, unless listed below.

34. WIRE CODES.

35. The wire codes used in this wiring diagram manual closely follow the military numbering system. A wire code consists of a circuit function letter, wire number, segment letter and wire size or gage. (See Figure 1.)

36. SYMBOLOGY.

37. A list of electrical and avionics symbols and descriptions used in this manual are located in Figure 2.

38. REFERENCE DESIGNATOR LIST.

This list contains reference designators shown in the wiring diagrams arranged in numeric-alpha sequence.

The figure in which the component is located along with the nomenclature of the component. (See WP 003 00.)

39. HISTORICAL RECORD OF APPLICABLE

TECHNICAL DIRECTIVES.

40. Technical directives are documents which provide instructions to incorporate and record retrofit configuration modifications or inspection instructions to delivered aircraft or aircraft components. All known Technical Directives applicable to and incorporated in this manual are entered in Record of Applicable Technical Directives list (See Table 1). Some Technical Directives may be incorporated prior to their release date. When all affected aircraft are modified per Technical Directive the Technical Directive is rescinded, all before conditions are removed from work packages, and Technical Directive entry in Record of Applicable Technical Directives is removed.

41. TECHNICAL PUBLICATIONS DEFICIENCY

REPORT (TPDR).

42. Submit TPDRs via https://jdrs.mil.

43. The TPDR page is provided to identify the TPDRs incorporated in the current issue of the manual.

44. INTERIM RAPID ACTION CHANGES (IRAC).

45. An Interim Rapid Action Change (IRAC) will be issued for urgent changes which would be unacceptably delayed if issued by normal change action. An IRAC can be issued for one of the reasons listed:

a. safety of personnel

b. safety of flight

c. aircraft grounding

d. equipment damage

e. environmental impact

f. mission readiness

46. When an IRAC is issued, the IRAC will be incorporated into the next scheduled change to the manual. When an IRAC is incorporated, the words “This issue includes IRAC XX,” will appear on the title page and the words “(IRAC XX inc.)” will appear next to the manual change date in the numerical index of effective pages.

23 - 20 - 01

L SECTION NUMBER

...__ ___ SUB SYSTEM NUMBER

~----- SYSTEM NUMBER

Figure 1. Wire Codes

C D E F G H J K L

6 P 52 A 4 N q

CIRCUIT FUNCTION LETTERS~ /

WIRE NUMBER-----~·

WIRE SEGMENT LETTER

WIRE SIZE (AW.G,o-----~

SUFFIX---------~

Control Surfaces Miscellaneous Instruments Engine Instruments Flight Instruments Landing Gear Heating, Ventilating and Deicing Ignition Engine Control Lighting

M Miscellaneous P DC Po\/1/er Q Fuel and Oil V DC Power for AC System W Warning and Emergency X AC Po\/1/er

Figure 2. Electrical Symbols (Sheet 1 of 2)

~ lo; m etiOU! ,a.e IMNOU!POlf Oll(U 'IHAOW DOU!llE THROW

H)~ t-<Y"-1 TOO<lUe

PUfiH.<M< mw~ PU9H.O,FSW1T01 "-'LAY

DIOOI!

!------Joi--/ f----tf---; ~ Ol!NE,...._ ·-- mu,11

UNIDlRECT)()tW. BIOIREC'TIONAL

.. Tn!AY

FOOTO'MTCH

i--ct=]J:>-(

FUSE.

RADAR

M,:TalET"fR

~J l"OOTS'¥1ffl:H

15 ,.

0 ,.

110 /' 011 [F illf1 00 120 0 o,.

°" "llA'r SWITCH CONNECTOR u ,re,, CONNECIOR

WITH5"raD

T!RMINAL 80ARC ...,._TIHO

TO-

► ► >--rB)--4 -"N- Hl--f 00 ~ cro pfjp NPN 81'1.ICE ..,..,OR CAPACITOR """" PUSH-PU.L TOGCl£

TIWW8TOR TfWl8IST0A

~ CB 0 ~ ~

TIUH6'SlOR

STARffR-oENERATOA.

VAAIIIIII.£ REBISTOR

Oll()I.WD

CME,UHF,'IHFNI> --

MOTOR

H STOWEil -

COMM -

li\-110NUOHT

QUO(

DlllOONNECl i-:e-, COAXIAi.

CAil.i

0--f CCCl<Pn'UOHT

TRM19f"OfMR

SHIELD

W1REB

ffi

WNINNJ LIGtiT

Figure 2. Electrical Symbols (Sheet 2)

Table 1. Historical Record of Applicable Technical Directives

Type/No. Date Title and ECP No. Date Inc. Remarks

AFC-2 30 AUG 85 RADIO INSTALLATION MODIFICATION

(RAMEC T-05-85)

22 JUN 15 —

AFC-3 21 NOV 85 REAR SEAT ICS DUAL CAPABILITY MODI-

FICATION (RAMEC T-07-85)

22 JUN 15 —

AFC-4 7 APR 86 FUEL QUANTITY RESISTOR RELOCATION

(RAMEC T-01-86)

22 JUN 15 —

AFC-7 29 AUG 88 TH-57 ANTICOLLISION LIGHT

VISIBIILITY IMPROVEMENT

(RAMEC T-01-87) (WUC 44215)

22 JUN 15 —

AFC-8 15 AUG 89 AFT CREW STATION ICS CORD

(RAMEC T-02-89)

22 JUN 15 —

AFC-9 15 MAR 90 ALTITUDE ENCODER, KE-127;

INSTALLATION OF (WUC 63R6 2)

22 JUN 15 —

AFC-11 5 SEP 90 FUEL PRESSURE TRANSDUCER FILTER

(RAMEC T-6-89)

22 JUN 15 —

AFC-13 28 OCT 92 AIRCONDITIONING UPGRADE

(ECP FAA STC SH1504NM)

22 JUN 15 —

i 1! .,...oiri

[B:

14 0 11

0 0

1s 0 / 011

120 0 o,, EXIEIIW. P(lWER - OFF

RECEl'TACU: REIAYSWl!CH ~ J DIJB.EPllIJ DOl8.E'ltfl(1jj !Ul.l'fQE

,A1 E II~ fl ~ v(II

IHRICE

IEillllET

Q.IJTQt ffllll'PftCI£ A!TOOAT~

AFC-17 30 DEC 97 TURBINE OUTLET TEMPERATURE (TOT)

AND TORQUE GAGES REPLACEMENT OF

22 JUN 15 —

AFC-18 23 OCT 97 ALTITUDE ENCODER (RAMEC T-03-97) 22 JUN 15 —

AFC-20 14 OCT 97 SEARCHLIGHT WIRING

(RAMEC T-04-96)

22 JUN 15 —

AFC-21 30 DEC 97 TH-57 GLOBAL POSITIONING

SYSTEM(GPS), INSTALLATION OF

22 JUN 15 —

AFC-23 15 JUL 01 AUTO-FAULT CHIP DETECTION

SYSTEM, INSTALLATION OF

22 JUN 15 —

AFC-24 18 JAN 01 WIRING MODIFICATIONS

(RAMEC T-06-00)

22 JUN 15 —

AFC-25 1 JUN 05 ANALOG NIGHT VISION INFORMATION

SYSTEM, INSTALLATION OF

22 JUN 15 —

AFC-26 13 APR 05 SEALED LEAD ACID BATTERY (SLAB) 22 JUN 15 —

AFC-27 13 APR 05 MINI STAB EMI FILTER, PREVENT ELEC-

TRICAL FEEDBACK TO THE CYCLIC

ACTUATOR MOTOR

22 JUN 15 —

AFC-29 6 JUL 05 TH-57 AUTO-FAULT CHIP DETECTOR

POWER UNIT (AFCDPU)

22 JUN 15 —

AFC-31 2 NOV 07 ANTI-COLLISION LIGHT AND LANDING

LIGHT SWITCH EXTENSION

(WUC 44212, 44215) (RAMEC T-03-07)

22 JUN 15 —

AFC-34 20 OCT 11 STARBOARD REAR SEAT RESTRAINT

REPLACEMENT

22 JUN 15 —

AFB-9 2 MAY 90 TH-57C BUS BAR, P/N 949-11811-002,

INSPECTION OF

22 JUN 15 —

AFC-43 28 AUG 18 TH-57B AVIONICS, UPGRADE OF 12 OCT 18 —

AFC-44 4 OCT 17 TH-57B AVIONICS, UPGRADE OF 12 OCT 18 —

Table 1. Historical Record of Applicable Technical Directives (Continued)

Type/No. Date Title and ECP No. Date Inc. Remarks

Change 2 - 9 March 2021

Table 2. Subject Index

A

ARC-159 Transceiver (B Model) 23-10-00 ADF Navigation System (C Model) 34-00-00 Air Conditioning System, Electrical 21-00-00 Air Data Computer (C Model) 22-00-00 Altimeter 34-20-01 Anti-Collision Light 33-40-00 Annunciator Dimmer Assembly (C Model) 33-10-02 ARC Intercommunication Wiring Diagram 23-40-01 Audio Control 23-40-01 Audio Generator Unit 23-40-02 Audio Mute Switch 23-40-02 Auto-Fault Chip Detector System 31-00-00 Avionics Inv (C Model) 24-00-00

B Battery BT1 24-00-01 Battery Compartment Module (C Model) 24-00-00 Battery Relay 24-00-01 Blind Encoder A-30 34-20-02 Blower, Air Conditioner (aft) 21-00-00 Bus Switching Unit (C Model) 77-00-04 Bus Switching Unit, Wiring Diagram 24-00-00

C C-6533/ARC ICS; Pilot, Copilot and Aft 23-40-00 Cargo Hook Wiring (B Model) 50-00-00 Caution Light Test Switch 33-10-00 Caution Panel 24-00-00 CI-1125 Antenna Coupler Clock 33-00-01A Cockpit Lights 33-10-03 Collective Stick 24-00-00 COMM 1 System (B Model) 23-10-00 COMM 1 System Wiring Diagram

(B Model) 23-10-00

COMM 2 System Wiring Diagram 23-10-03 Compass/Heading System 34-00-00 Compressor Assembly 21-00-00 Condenser, Air Conditioner 21-00-00 Configuration Module (C Model) 28-00-02 Control Boost Switch 29-00-00 Control Tube Actuator, MINISTAB (C Model) 22-00-00

Controller, MINISTAB (C Model) 22-00-00 Co-pilot Force Trim 22-00-03 Co-pilot Grip 22-00-00 Co-pilot Instrument Panel 33-00-00

Course/DME Select Relay (C Model) 34-20-04 Course Deviation Indicator (C Model) 34-00-00 Cyclic Stick, Pilot and Copilot 23-40-00 Cyclic Stick Grip 22-00-04

D DC Power System (C Model) 24-00-00 DC Power System Loading (C Model) 24-00-00 DC Voltmeter 24-00-02 Dimmer Circuit Relay (C Model) 33-10-00 Dimmer Circuit Wiring Diagram (C Model) 33-10-00 Directional Gyro 34-00-00 Distance Measuring Indicator (C Model) 34-20-04 DMC 70-1/A Antenna 23-10-03 DME Display Interface Assembly (C Model) 34-20-05 DME Indicators (C Model) 34-00-00 DME/TACAN Antenna (C Model) 34-00-00 DME/TACAN System (C Model) 34-00-00 DME/TACAN Transceiver (C Model) 34-00-00 DMN48-1 NAV Antenna 34-00-00 Dual Voltmeter (C Model) 24-00-00

E Edge Light Control Panel 33-10-00 EFIS or CDI/HSI Interface 34-00-00 Electrical Control Panels 24-00-00 Electrical System 24-00-01 Electrical Wiring, Auto Fault System 31-00-00 Engine Compartment 24-00-00 Engine Fire Detection Caution Light 26-10-00 Environmental Control Wiring Diagram 21-00-00 Evaporator, Air Conditioner 21-00-00 Expansion Valve, Air Conditioner 21-00-00 External Power Receptacle 24-00-01 External Power Relay 24-00-01

F FCS Controller (C Model) 33-00-01A FCS Inv (C Model) 24-00-00 Flight Controls (C Model Helicopters) 22-00-00 Fire Detector System 26-10-00 Fire Detector Test Switch 26-10-00 Fire Overheat Detector 26-10-00 Flight Control System Off Switch 22-00-00 Flux Valve 34-00-00 Fore and Aft Force Trim Mag Brake

(B Model) 22-00-03

Force Trim (B Model) 22-00-03

Table 2. Subject Index - (Continued)

F (Continued)

Force Trim Rigging (B Model) 22-00-03 Force Trim Switch 22-00-03 FT-25 Speaker Amp (B Model) 23-40-00 Fuel Indicators 28-00-00 Fuel Pressure Loadmeter 28-00-01 Fuel Pressure Transmitter 28-00-01 Fuel Pump 28-00-01 Fuel Pump Noise Filters (Ref) 28-00-02 Fuel Shut off Valve 28-00-01 Fuel Tank Units, (B and C Models) 28-00-00

G Gen Field Control Relay (B Model) 24-00-01 GPS Antenna (C Model) 34-20-04

H HS Power Supply 33-40-00 Heading Interface 34-00-00 Heading/Navigation System (B Model) 34-00-00 Headphone Jacks, Pilot and Copilot 23-40-04 Heating System 21-00-00 Horizontal Situation Indicator 34-00-00 Hydraulic Bypass Solenoid 29-00-00 Hydraulic Low Pressure Caution Light B 29-00-00 Hydraulic Low Pressure Caution System 29-30-00 Hydraulic Pressure Switch 29-30-00

I ICS Foot Switch, Pilot and Copilot 23-40-01 ICS Headset Cord 23-40-01 IFR Power Distribution (C Model) 24-60-00 Illuminated Panels, Upper and Lower 33-00-01A Instrument Cluster 24-00-01 Interior Lighting System 33-00-02

J Junction Box, MINISTAB (C Model) 22-00-00

K KA-23 Marker Beacon Antenna (C Model) 34-20-03 KA-33 Cooling Fan (C Model) 34-20-04 KA-40 Marker Beacon Indicator (C Model) 34-20-03 KA-51B Slaving ACC 34-00-00 KA-54 Antenna 34-20-01 KA-44B ADF Antenna (C Model) 34-00-00 KA-60 Transponder Antenna 34-00-00 KA-65 Isolation Amplifiers (C Model) 23-40-01 KCM-100 Configuration Module (C Model) 34-20-04

KDI-572, DME Indicator No. 1 (C Model) 34-00-00 KDI-573, DME Indicator No. 2 (C Model) 34-00-00 KE-127 Blind Encoder 34-20-02 KG-102A Gyro 34-00-00 KI-206 CDI (C Model) 34-00-00 KI-525A HSI Indicator 34-00-00 KLN-900 GPS Receiver (C Model) 34-20-04 KMA-24H Audio Panels (C Model) 23-40-01 KN-72(B Model) 23-10-02 KNI-416, RAD ALT Indicator, No. 1 and 2 34-20-01 KNI-532 RMI, (B Model) 23-10-02 KNI-582 RMI, No. 1 and 2 34-00-00 KNS-81 NAV 1 (C Model) 34-00-00 KR-21 Marker Beacon Receiver (C Model) 34-20-03 KR-87 ADF Receiver (C Model) 34-00-00

KRA-405 RAD ALT R/T 34-20-01

KRA-405 RAD ALT R/T (B Model) 34-20-01 KT-79 Transponder 34-20-02 KTU-709 DME (C Model) 34-00-00 KX-155 NAV COMM Receiver (B Model) 23-10-02

L L4 Audio Attenuator (B Model) 23-40-00 Landing Light 33-40-03 Lateral Force Trim Mag Brake (B Model) 22-00-03 Light Adapter, Marker Beacon (C Model) 34-20-03 Lighting Circuit Wiring Diagram (C Model) 33-00-00 Lighting Panel, 5V (C Model) 33-00-01A Load Meter 24-00-00 Lower Circuit Breaker Panel (C Model) 24-60-01

M Main Battery System (C Model) 24-00-00 Main Battery System (B Model) 24-00-01 Main Regulator (C Model) 24-00-00 Main Regulator (B Model) 24-00-01 Marker Beacon Antenna (C Model) 34-20-03 Marker Beacon Indicators (C Model) 34-20-03 Marker Beacon Wiring Diagram (C Model) 34-20-03 MINISTAB System Wiring Diagram

(C Model) 22-00-00

MINISTAB Yaw Option (C Model) 22-00-02

N NAV 1 Receiver 34-00-00 NAV 2 Receiver (C Model) 34-20-04 Navigation Antenna (DMN 48-1) 34-00-00 Navigation Instruments 34-00-00 Navigation Lights Flasher 33-40-02 Navigation Wiring Diagram (B Model) 34-00-00

Table 2. Subject Index - (Continued)

N (Continued)

Night Flying System Wiring Diagram (C Model) 33-00-04

NVIS Lighting (C Model) 33-00-03

O Over voltage Regulator (B Model) 24-00-01

P

PC-50 Inverter (C Model) 22-00-00 Pilot GPS Switch, No. 1 and 2 (C Model) 34-20-04 Pilot External DH Indicator (C Model) 33-00-03 Pilot Remote Annunciator (C Model) 34-20-04 Pitch Computer (C Model) 22-00-00 Pilot’s Force Trim (B Model) 22-00-03 Pilot Grip (C Model) 22-00-00

Pilot Instrument Panel (C Model) 33-00-00 Pitch Indicator (C Model) 22-00-00 Pitch Trim Damper Unit (C Model) 22-00-00 Position Lights 33-40-02

R

RAD/ALT Antennas 34-20-01 RAD/ALT Indicators 34-20-01 Radar Altimeter Wiring Diagram 34-20-01 Reverse Current Relay (B Model) 24-00-01 Roll Computer (C Model) 22-00-00 Roll Indicator (C Model) 22-00-00 Rotor Tach Gen. 29-00-00

S Search Light 33-40-01 Speaker, 4A2 (B Model) 23-40-00 Standby Attitude Indicator (C Model) 24-00-00 Standby Battery System (C Model) 24-00-00 Standby Regulator (C Model) 24-00-00 Standby Generator Reset Switch (C Model) 24-00-00 Standby Generator Shunt (C Model) 24-00-00 Standby Generator System (C Model) 24-00-00 Standby Voltage Regulator (C Model) 24-00-00 Starter Relay (B Model) 24-00-01 Starter Generator (C Model) 24-00-00 Starter Generator (B Model) 24-00-01 Starter Switch 24-00-00 Static Inverters (C Model) 24-00-00 Switching and Protection Conditions

(C Model) 24-00-00

Switching Relay, Pilot and Copilot (C Model) 34-20-04

T

Tail Light 33-40-02 Temperature Sensor 33-10-01 Test Connector, MINISTAB (C Model) 22-00-00 Thermocouple Temperature (TOT) Ind. 77-00-02 Torque Indicator (NVIS) (C Model) 77-00-03 Torque Indicator and Wire Harness 77-00-04 TOT Calibration Set Up (NVIS) (C Model) 77-00-02 TOT Outline and Pin Out Drawing 77-00-00 TOT Outline and Pin Out Drawing (NVIS) 77-00-01 Transponder 34-20-02 Transponder and Blind Encoder System 34-20-02 Transponder Antenna 34-00-00

U

UF 10-76 Antenna 23-10-00 UHF Control Panel, KFS599A (C Model) 23-10-01 UHF Transceiver, KTR909 (C Model) 23-10-01 UHF Wiring Diagram (C Model) 23-10-01 Upper Circuit Breaker Panel 24-00-00

V VHF Antenna 23-10-03 Voltmeter Panel (C Model) 24-00-00 Voltage Regulator 24-00-00

W

Wet Compass 33-00-00 Wire Circuit Function Intro

Y

Yaw Actuator (C Model) 22-00-01 Yaw Computer (C Model) 22-00-01

Yaw Control Tube Actuator Assembly (C Model) 22-00-01

Yaw Computer (C Model) 22-00-01 Yaw Indicator (C Model) 22-00-00 Yaw Power Amplifier (C Model) 22-00-01 Yaw Servo Amp (C Model) 22-00-01

A1-H57BC-WDM-000 003 00

ORGANIZATIONAL MAINTENANCE

NUMERICAL INDEX OF REFERENCE DESIGNATIONS

WIRING DIAGRAMS

REF

DES NOMENCLATURE DWG

NO.

1S16 FUEL LOW LEVEL SW 28-00-00

2301AR1 FT 25 SPKR AMP 23-40-00

2301CP1 PILOT C-6533/ARC ICS 23-40-00

2301CP2 CO-PILOT C-6533/ARC ICS 23-40-00

2301CP3 AFT C-6533/ARC ICS 23-40-00

2301DS1 KNI-532 RMI IND 23-10-02

2301LS1 4A2 SPEAKER 23-40-00

2301LS2 4A2 SPEAKER 23-40-00

2301R1 L4 AUDIO ATTN 23-40-00

2301S1 PILOT ICS FT SW 23-40-00

2301S2 CO-PILOT ICS FT SW 23-40-00

2303TR1 KX-155 NAV COMM 23-10-02

2303E1 COMM ANTENNA 23-10-02

3407DS1 HSI IND 23-10-02

3407DS3 KA-51B COMPENSATOR 34-00-00

3407MP1 KG-102A GYRO 34-00-00

3407PS1 KN-72 CONVERTER 23-10-02

3407TR1 FLUX VALVE 34-00-00

3408DS1 KNI-415 IND 34-20-01

3408E1 RADA ALT XMIT ANT 34-20-01

3408E2 RADA ALT RCVR ANT 34-20-01

3408TR1 RADAR ALTIMETER 34-20-01

8DS2 ANTI-COLLISION LIGHT 33-40-00

8PS2 HS POWER SUPPLY 33-40-00

9L4 FORE/AFT MAG BRAKE 22-00-03

9L5 LATERAL MAG BRAKE 22-00-03

9S1 FORCE TRIM SW 22-00-03

9S2 PILOT'S CYCLIC FORCE TRM SW 22-00-03

ANNP1 ANNUNCIATOR DIMMER ASSY 33-10-02

A1 CAUTION PANEL 33-10-00

BT1 AIRCRAFT BATTERY (B MODEL) 24-00-01

B11 FWD FUEL PUMP 28-00-01

B11 FUEL PRESSURE XMTR 28-00-01

B201 AIRCRAFT BATTERY 24-00-00

B6 FUEL SHUT OFF VALVE 28-00-01

CB100 FT ESS 2 22-00-00

CB205 LOADMETER VM 24-00-00

CB206 LOADMETER 24-00-00

CB207 BAT RELAY 24-00-00

CB208 BUS TIE RELAY 24-00-00

CB209 STDBY GEN RELAY 24-00-00

CB210 ENG IGN 24-00-00

CB211 MAIN GENERATOR RESET 24-00-00

CB212 MAIN GENERATOR FIELD 24-00-00

CB213 ENGINE START 24-00-00

CB214 STBY BAT CHRG 24-00-00

CB215 BAT 24-00-00

CB216 STBY GEN 24-00-00

CB217 MAIN GEN 24-00-00

CB218 MAIN GENERATOR 24-00-00

CB219 BATTERY 24-00-00

CB220 NON-ESSENTIAL BUS SUPPLY 24-00-00

CB221 ESS 1 BAT PROTECTION 24-00-00

CB222 FCS ESS 1 24-00-00

CB223 ESS 1 BUS SUPPLY 24-00-00

CB224 ESS 1 VM MAIN GEN RESET 24-00-00

CB225 ESSENTIAL VM 24-00-00

CB226 NON-ESSENTIAL VM 24-00-00

CB227 AVIONICS INV 24-00-00

CB228 FT ESS 1 24-00-00

CB28 ENG CHIP 31-00-00

CB401 RMI RIGHT 34-00-00

CB402 ADF 34-00-00

CB403 NAV 2 34-00-00

REF

DES NOMENCLATURE DWG

NO.

A1-H57BC-WDM-000 003 00

CB404 UHF COMM 23-10-00

CB405 ICS LEFT EMER 22-00-00

CB407 ICS RIGHT NORM 22-00-00

CB410 TURN IND RIGHT 33-00-00

CB411 VHF COMM 23-10-03

CB412 NAV 1 34-00-00

CB413 HSI 34-00-00

CB414 ICS RIGHT EMER 22-00-00

CB415 ICS LEFT NORM 22-00-00

CB416 DME 34-00-00

CB417 RAD ALT 28-00-01

CB418 RMI LEFT 34-00-00

CB419 MKR BCN 34-20-03

CB420 TURN IND LEFT 33-00-00

CB421 ATT IND LEFT 33-00-00

CB710 INSTR LIGHTS 33-00-01A

CB711 CO-PILOT CKPT LIGHTS 33-40-00

DS1 VERTICAL LANDING LIGHT 33-40-03

DS2 POSITION LT 33-40-02

DS3 POSITION LT 33-40-02

DS4 TAIL LT 33-40-02

GPSDS1 PILOT REMOTE ANN NO. 1 34-20-04

GPSDS3 COURS INOP ANN 34-20-04

GPSE1 GPS ANTENNA 34-20-04

GPSK1 PILOTS SWITCHING RELAY 34-20-04

GPSK2 CO-PILOTS SWITCHING RELAY 34-20-04

GPSK3 COURSE/DME SEL RELAY 34-20-04

GPSR1 KLN-900 GPS 34-20-04

GPSSW1 PILOT GPS SW NO. 1 34-20-04

GPSSW2 PILOT GPS SW NO. 2 34-20-04

G101 STARTER GENERATOR 24-00-01

G2 ROTOR TACH GEN 29-00-00

G201 MAIN GENERATOR 24-00-00

G202 STNBY GENERATOR 24-00-00

K201 EXTERNAL PWR RELAY 24-00-00

K202 BATTERY RELAY 24-00-00

K205 MAIN GEN RELAY 24-00-00

K207 STNBY GEN IND RELAY 24-00-00

REF

DES NOMENCLATURE DWG

NO.

K24 DIMMER CIRCUIT RELAY 33-10-00

L1 HYDRAULIC BYPASS SOLENOID 29-00-00

M10 FUEL QTY INDICATOR 24-00-02

M4 D.C. VOLTMETER 28-00-00

R5 FUEL IND FULL ADJ 28-00-00

R6 FUEL IND EMPTY ADJ 28-00-00

S17 FUEL VALVE PWR SW 28-00-01

S33 CARGO RELEASE SW 50-00-00

S49 SEARCH LIGHT PWR SW 33-40-01

S67 HYDRAULIC PRESSURE SW 29-30-00

S68 NAV LIGHTS SELECTOR SW 33-40-02

S70 FIRE DETECTOR TST SW 26-10-00

S95 SEARCH LIGHT SELECTOR SW 33-40-01

S97 RPM SENSOR SW 23-40-02

S99 LOW RPM WARN COLL SW 23-40-02

S107 CAUTION LIGHT TEST SW 33-10-00

S201 BATTERY SW 24-00-00

S202 STDBY GEN SW 24-00-00

S204 STBY ATT IND SW 24-00-00

S206 START SW 24-00-00

S290 MAIN GEN RESET SW 24-00-00

S405 PILOT FOOT SW 23-40-01

S406 CO-PILOT FOOT SWITCH 23-40-01

S407 PILOT CYCLIC SW 23-40-01

S408 CO-PILOT CYCLIC SWITCH 23-40-01

S410 AUDIO MUTE SW 23-40-03

UHFCBI UHF COMM ANTENNA 23-10-01

UHFCP1 UHF CONTROL PANEL 23-10-01

UHFE1 UHF COMM ANTENNA 23-10-01

VR201 MAIN REGULATOR 24-00-00

VR202 STNBY REGULATOR 24-00-00

Z4 UPPER FUEL TANK PROBE 28-00-00

Z5 LOWER FUEL TANK PROBE 28-00-00

REF

DES NOMENCLATURE DWG

NO.

A1-H57BC-WDM-000 004 00

ORGANIZATIONAL MAINTENANCE

WIRING DIAGRAMS INDEX

WIRING DIAGRAMS

System Wiring Diagram Alphabetical Index Drawing

System Number

AIR CONDITIONING

Air Conditioning Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-00-00

AUTO FLIGHT

Flight Control/MINISTAB System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-00 Flight Control/MINISTAB System Wiring Diagram (Yaw) (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . 22-00-01 MINISTAB Yaw Option Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-02 Cyclic Force Trim Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-03 Cyclic Stick Grip Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-00-04

CARGO AND ACCESSORY COMPARTMENTS

Cargo Hook Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-00-00

COMMUNICATIONS

AN/ARC-159 UHF COMM 1 System Wiring Diagram (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-00 KTR 909 UHF COMM System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-01 KX-155 VHF COMM 2 System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-02 KY-196 COMM 2 System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10-03 C6533/ARC Intercommunication System Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . 23-40-00 C6533/ARC Intercommunication System Wiring Diagram (TH-57B) After AFC-43 - Deleted . . . 23-40-00A KMA-24H Audio/ICS Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-01 PAC-24 Audio/ICS Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-01A Tone Generator Wiring Diagram (TH-57B) Before AFC-43 - Deleted . . . . . . . . . . . . . . . . . . . . . . 23-40-02 Tone Generator Wiring Diagram (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-02A Tone Generator Wiring Diagram (TH-57C) Before AFC-44 - Deleted . . . . . . . . . . . . . . . . . . . . . . 23-40-03 Tone Generator Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-03A Crew Headset Cord Wiring Diagram Before AFC-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-04 Crew Headset Cord Wiring Diagram After AFC-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-40-04A

ELECTRICAL POWER

Electrical Power System Wiring Diagram (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-00 Electrical System Wiring Diagram (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-01 Voltmeter Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-02 Bus Switching Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-00-03 Power Distribution (TH-57B). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-00 Bus Distribution (TH-57C) Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-01 Bus Distribution (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-01A Lower Circuit Breaker Panel (TH-57C) - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-02 Lower Circuit Breaker Panel (TH-57C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-60-02A

ENGINE INDICATING

Turbine Outlet Temperature Indicator Circuit (TH-57B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-00 Turbine Outlet Temperature Indicator Circuit (TH-57C W/O NVIS) . . . . . . . . . . . . . . . . . . . . . . . . 77-00-01 Turbine Outlet Temperature Indicator Circuit (TH-57C NVIS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-02 Turbine Outlet Temperature Outline Pin Drawing with NVIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-03 Torque Indicator w/ NVIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-04 Torque Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-00-05

Change 5 - 26 March 2024

I

A1-H57BC-WDM-000 004 00

System Wiring Diagram Alphabetical Index (Continued)

Drawing System Number

FIRE PROTECTION

Engine Fire Detection Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-10-00

FUEL

Fuel Quantity Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-00 Low Fuel Warning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-01 Fuel Pump Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-00-02

HYDRAULIC POWER

Hydraulic Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-00-00 Hydraulic Pressure Low Warning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30-00

INDICATING / RECORDING SYSTEMS

Auto Fault Chip Detector Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-00-00

LIGHTS

Lighting Circuits Wiring Diagram (TH-57C) Before AFC-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-00 Lighting Circuits Wiring Diagram (TH-57C) After AFC-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-00A Lighting Circuits (TH-57C) Before AFC-44 - Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-01 Lighting Circuits (TH-57C) After AFC-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-01A Simplified Interior Lighting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-02 Night Vision Information System Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-03 Night Flying System Wiring Diagram (Overhead Console). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-00-04 Caution Panel/Dimming Circuits Interconnect Wiring Diagram Before AFC-44 - Deleted . . . . . . . 33-10-00 Caution Panel/Dimming Circuits Interconnect Wiring Diagram After AFC-44. . . . . . . . . . . . . . . . 33-10-00A Duct Temp High Indicator Segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-10-01 Annunciator Dimming Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .