Attachment 0009 - Critical Characteristics.pdf

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Solicitation for the Overhaul of the Main Rotor Blade for the UH-60 Black Hawk
Solicitation number
W58RGZ-26-B-0001
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This is an M&O Critical Safety Items document (GB362-1) that identifies critical safety components and their manufacturing requirements for UH-60 main rotor blade assemblies.

The document lists seven primary components with part numbers, National Stock Numbers (NSNs), and detailed critical characteristics requiring verification during manufacturing and maintenance operations. The primary assembly is part number 70150-09100-043 (Blade Assy, M/R, NSN 1615-01-106-1903), which contains sub-assemblies 70150-09101-043 and 70150-09101-045. Critical characteristics for this assembly include bond skin assembly verification per bond control requirements and tip cap screw torque verification during initial assembly and subsequent retorques. Additional components include blade sub-assemblies, cuff assemblies, cuff forgings, and tip cap assemblies (part numbers 70150-09101-043, 70150-09109-041, 70150-09109-101, 70150-09127-001, 70150-09207-041, and 70150-09207-044). Critical characteristics across all components address surface finish requirements (nicks, dents, scratches limitations per SS9208), roller burnish compliance, edge break inspections, shot peen coverage verification using liquid tracer dye per SS8766, corner radius tolerances (0.040±0.010), and heat treat condition verification through microstructure examination. Six approved replacement sources are listed, with Sikorsky Aircraft Corp (CAGE code 78286) serving as the primary approved source across all components. Serial number requirements, engineering test requirements, and fatigue endurance testing are specified for each assembly, with most components requiring initial engineering testing and fatigue endurance evaluation.

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Final Amendment 0003 - Solicitation W58RZG-26-B-0001.pdf PDF
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M&O Critical Safety Items

Part Number

Yes - 1/25/2018Nomenclature

NSN70150-09100-043

CSI /

Date

Blade Assy, M/R

1615-01-106-1903

M D I Critical Characteristic

Y Y N Bond skin assemblies to each other along the trailing edge tab per note 1. Inspection acceptance of the bond within the final production trim to the requirements of bond control 70150-09160, para. 6, is a Critical Characteristic.

Y Y Y Verification of tip cap screw torque to the requirements specified in field of drawing and note 14 is a C.C. during initial assembly or installation and at subsequent stabilization retorques.

Y Y N Assembly Contains CSIs 70150-09101-043 and 70150-09101-045.

CAGE Approved Replacement (Spares) Source Name

7HDT0 Advanced Composite Structures FL

78286 Sikorsky Aircraft Corp

52VE4 Overhaul Support Services LLC

2491A Israel Aerospace Industries - Bedek, Accessories Mata

1EKF5 Aviation Blade Services, Inc.

1BHR6 IAC LTD

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Output Part

Part Number

Yes - 6/20/2025Nomenclature

NSN70150-09101-043

CSI /

Date

Blade Sub-Assy, M/R

M D I Critical Characteristic

Y Y Y Compliance with roller burnish marked * in field of drawing requires verification. Acceptance is a C.C.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

Part Number

Yes - 6/20/2025Nomenclature

NSN70150-09109-041

Cuff Assy, M/R

1615-01-099-2341

PRI

D

GB362-1 Part Number

NomenclatureNSN System

Status70150-09100-043

BLADE, MAIN ROTOR1615-01-106-1903 UH-60

Routine

Page 1 of 3M&O Critical Safety Items - GB362-1

CSI /

Date

M D I Critical Characteristic

Y Y N Nicks, dents, scratches and scuff marks within the lugbores of the 1.124 to 1.125 dia holes including chamfers and the surface area of the lug denoted by -e- shall not exceed the acceptance limits of SS9208, para 3.1. Acceptance is a C.C.

N Y N Compliance with roller burnish marked * in field of drawing requires verification. Acceptance is a C.C.

N Y N Verification of .040 +/- .010 corner radius of bolt holes.

CAGE Approved Replacement (M&O) Source Name

82001 PCX Aerostructures, LLC - Newington

78286 Sikorsky Aircraft Corp

15152 PCX Aerosystems – Manchester LLC

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Part Number

Yes - 1/25/2018Nomenclature

NSN70150-09109-101

CSI /

Date

Cuff, M/R

1615-01-432-9948

M D I Critical Characteristic

Y N N DRWG Note/Zone: 33 Sheet 1 - Inspect the indicated holes for presence of Edge Break. Verification of Edge Break is a Critical Characteristic.

Y Y N Nicks, dents, scratches and scuff marks within the lugbores of the 1.124 to 1.125 dia holes including chamfers and the surface area of the lug denoted by -E- shall not exceed the acceptance limits of SS9208, para 3.1. Acceptance is a C.C.

Y Y N Inspect each part for shot peen coverage in the lugbores of the 1.124 to 1.125 dia holes including chamfers and the surface area of the lug denoted by -E- using liquid tracer dye per SS8766. Areas where coating has not been completely removed must be visually inspected with 10x magnification, verifying overlapping dimple appearance. Verification of coverage for this method is a C.C.

N Y N Compliance with roller burnish marked * in field of drawing requires verification. Acceptance is a C.C.

N Y N Verification of .040 +/- .010 corner radius of bolt holes.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

Part Number

Yes - 9/24/2019Nomenclature

NSN70150-09127-001

CSI /

Date

Cuff, Forging, Blade, M/R

M D I Critical Characteristic

Y N N The beta solution heat treat and overaged condition verification by microstructure examination note 7

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

Page 2 of 3M&O Critical Safety Items - GB362-1

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Part Number

NoNomenclature

NSN70150-09207-041

CSI /

Date

Tip Cap Assembly

1560-01-447-9774

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Part Number

NoNomenclature

NSN70150-09207-044

CSI /

Date

Tip Cap Assembly

1560-01-447-9774

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Page 3 of 3M&O Critical Safety Items - GB362-1

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