TGI 38JC212302A01 rev1.pdf

FOUO

FOUO: Public availability to be determined under 5 USC 552

TASK GROUP INSTRUCTION

AIM REV 20.11.4.0 (OCTOBER 2020)

TGI COMPONENT NAME: TYPE: PHASE: REPEAT: CHANGE:

NO.: VCHT RM 4-110-0-E AY A 0 1

SHIP/HULL NO.: SHIP/HULL NAME: SYSTEM: PROJ/WO NO: CASREP CAT:

DDG-83 USS HOWARD JC2

CU PHASE TITLE:

F/O - INSPECT, REPAIR, AND PRESERVE IN VCHT RM NO. ONE

PREPARING ACTIVITY:

PREPARED BY: CODE PHONE DATE

NAOKI KUROKAWA 231B. 315-243-0108 24-APR-2024

APPROVED BY: CODE PHONE DATE

RYOUTA TAKAGI 231B. 315-243-4502 24-APR-2024

CONCURRED BY: CODE PHONE DATE

CONCURRED BY: CODE PHONE DATE

CONCURRED BY: CODE PHONE DATE

CONCURRED BY: CODE PHONE DATE

REASON FOR WORK/NEED FOR CHANGE:

Revise identification is required.

CHANGE INSTRUCTIONS:

CH1: Revise paragraph 1.3.8 (07/24/2024)

SPECIAL REQUIREMENTS:

SURFMEPP

This work affects a fire zone boundary. Fabrication and/or staging of a non-flammable closure is required.

CLEANLINESS FOR PIPING SYSTEM/EQUIPMENT LEVEL III.

WORK CERTIFICATION SIGNATURES

COMPLETION OF WORK REVIEW: BADGE NO.: SHOP/CODE: PHONE: DATE:

ACCEPTANCE OF COMPLETED WORK

PHYSICAL INSPECTION PHYSICAL INSPECTION COMPLETED: BADGE NO.: SHOP/CODE: PHONE: DATE:

REQUIRED:☐YES ☒NO

RECORDS REVIEW: BADGE NO.: SHOP/CODE: PHONE: DATE:

TGI NO.: VCHT RM 4-110-0-E AY A 0

FOUO

SHIP: DDG-83 CHG/VER: 1/0

LIST OF EFFECTIVE PAGES

SHT NO. CHG NO. SHT NO. CHG NO. SHT NO. CHG NO. SHT NO. CHG NO. SHT NO. CHG NO.

1-8 Sketch (1-2)

J1-2 M1-2 Sketch (1)

1. SCOPE/PURPOSE

1.1 Title: Vacuum Collection Holding Tank (VCHT) Room No. One; inspect, repair, and preserve

1.2 Location of Work:

1.2.1 VCHT Room No. One (4-110-0-E)

1.2.2 Fuel Tank Group-2 (4-78-2-F)

1.2.3 Fuel Tank Group-2 (5-78-2-F)

1.2.4 Fuel Tank Group-2 (5-126-2-F)

1.2.5 Interior Communication and Gyro Room No. One (4-94-0-C)

1.2.6 Crew Baggage Room No. One (3-78-2-A)

1.2.7 Auxiliary Machinery Room No. One (4-126-0-E)

1.3 Identification:

1.3.1 Quantity (4 AY), VCHT Piping and Hose Assembly

1.3.1.1 Quantity (One AY), VCHT Piping, from outlet side flange joint of ball valve (VCHT-V-1A, PDJ/V0172) to inlet side flange joint of hose assembly (VCHT-F-1A, PDJ/HA016)

Size: 4 Inch IPS Material: Cu-Ni 90-10 Specification: MIL-T-16420 Remarks: See following for location detail.

2.3: Sheet 4A2 (Zone 4-F and 5-F of SECTION 4A2-5E) 2.4: Sheet 3A (Zone 4-C, 4-D, 4-E, and 4-F)

1.3.1.2 Quantity (One AY), VCHT Hose Assembly for Sewage Ejector Pump No. One A (PDJ/PMP10) Suction Side

Size: 4 Inch IPS Material: Rubber Type: Dog Leg Hose ID: VCHT-F-1A, PDJ/HA016 Remarks: See following for location detail.

2.3: Sheet 4A2 (Zone 4-F of SECTION 4A2-5E) 2.4: Sheet 3A (Zone 4-F)

FOUO

SHIP: DDG-83 CHG/VER: 1/0

1.3.1.3 Quantity (One AY), VCHT Piping including Pressure Gage (VCHT-GA-3B, PDX/GA004), from outlet side flange joint of cutout valve (VCHT-V-77B, PDX/V0019) and cutout valve (VCHT-V-79B, PDX/V0180) to inlet side flange joint of hose assembly (VCHT-F-10B, PDJ/HA003A)

Size: 2 Inch IPS Material: Cu-Ni 90-10 Specification: MIL-T-16420 Remarks: See following for location detail.

2.3: Sheet 3H (Zone 6-C, 6-D, 7-C, and 7-D of PLAN VIEW 3H-6B) 2.4: Sheet 3A (Zone 3-C, 4-C, 4-D, and 4-E)

1.3.1.4 Quantity (One AY), VCHT Hose Assembly for VCHT Sewage Pump No. One B (PDX/PMP02) Suction Side

Size: 2 Inch IPS Material: Rubber Type: Dog Leg Hose ID: VCHT-F-10B, PDJ/HA003A Remarks: See following for location detail.

2.3: Sheet 3H (6-D of PLAN VIEW 3H-6B) 2.4: Sheet 3A (Zone 3-E)

1.3.2 Quantity (One AY), Strainer Plate Assembly on Bilge Drain Well in 4-300-0-E

Remarks: See 2.6 for material and 2.5 for detail

1.3.3 Quantity (One AY), Flanged Piping Section: VCHT, Valve to Drain Well

Size: 2 Inch IPS Material: CuNi 90-10 Specification: MIL-T-16420 Remarks: See 2.7 for detail

1.3.4 Quantity (One EA), Bilge Drain Well in 4-110-0-E, between Frames 124 and 126, and Longitudinal No. 1P and No. 2P

Reading Point: 6 Inches x 6 Inches Grid Pattern in Bilge Drain Well, including beneath the bottom of suction piping(s)

Remarks: See 2.13 and 2.14 for base material and Sketch Enclosure-01 for detail

1.3.5 Quantity (2 EA), Zinc Anode, including studs on Bilge Drain Well in 4-110-0-E

Type: ZHC-23 Size: 6 Inches x 12 Inches x 1-1/4 Inches Thickness Remarks: See 2.8 through 2.12 for material and detail

1.3.6 Quantity (19 SF), Deck Plating around the Bilge Drain Well in 4-110-0-E

Remarks: The area is between Frames 122 and 126, and Longitudinal No. 3P and Ship’s Center Line except around vertical surfaces

1.3.7 Quantity (14 SF), Bilge Drain Well in 4-110-0-E, between Frames 124 and 126, and Longitudinal No. 1P and No. 2P

1.3.8 Quantity (190 SF), Bilge Area in 4-110-0-E

FOUO

SHIP: DDG-83 CHG/VER: 1/0

REF.

NO.

DOCUMENT

/DRAWING

NUMBER

DOCUMENT/DRAWING TITLE REV CHG

NO.

COPY

REQ’D

(Y/N)

SOURCE

DOC

(Y/N)

PARA SEC PG CHP

1 NSI FY-25 NAVSEA Standard Items - ORG N 2 LI FY-25 Local Standard Items - ORG N

3 DWG 505-

7027108

INSTL MCHRY & PP HOLD FR

110 TO FR 120

J Y 4A 2,3 H

4 DWG 593-

6567446

SEWAGE & PLUMBING DR DISH

PP DIAG

E Y 3A

5 DWG 8100-

4220-0002

SEACHEST STRAINER PLATES

AND DRAIN WELL COVER

T Y 13

6 PDD 100-

ELM-240158

SUPPLEMENTAL INFO FOR MATL

CHANGE OF DRAIN WELL STR IN

VCHT RM NO.1 (4-110-0-E)

- Y AL

L

7 DWG 593-

6567448

VACUUM SEWAGE SYS PP DIAG D Y 3A

8 DWG 113-

8570500

BILGE WELL REDESIGN MODS &

ML

A Y 1,2 ,6, 9 LAR

83111/DDG6

9/1146068

Add Zincs in Sump (Fwd VCHT 4- 110-0-E)

- Y AL

L

10 LAR

83111/DDG5

2/1168849

SUMP MATERIAL WALL

THICKNESS

- Y AL

L

11 LAR

83111/DDG5

1/1209108

THIS ALT MODIFIED FROM A

SHIPALT TO A (AER)

ALTERATION EQUIVELENT TO A

REPAIR

- Y AL

L

12 DWG 633-

6567062

Installation of Cathodic Protection & Zinc Anode

AB Y 4A

,4 B

13 DWG 100-

7026677

UNIT STRL ARR DWG ASSY UNIT

H Y 3,4 A, 14 DWG 100-

7026672

UNIT STRL ARR DWG ASSY UNIT

E Y 3,4 ,6 A

15 TM T9074-

AS-GIB-

010/271

Requirements for Nondestructive Testing Methods

1 N

16 TM S9086-

DA-STM-

010/CH-100

Hull Structures 4 N

Remarks: See Sketch Enclosure-02 for location detail and the area including vertical structural surface up to height of 7 inches from tank top plating such as structure members, deck fittings, bulkhead fittings, foundation, coaming, piping, and piping hangers.

1.4 Security Classification: None.

1.5 Initial Condition:

1.5.1 Critical Coated Area: CCNY-DDG83-019-24 for the areas listed in 1.3.6 through 1.3.8.

1.5.2 Potential Asbestos Hazard

1.6 Contractor work start date: 4/7/2025

1.7 Contractor work completion date: 9/3/2025

2. REFERENCES:

FOUO

SHIP: DDG-83 CHG/VER: 1/0

REF.

NO.

DOCUMENT

/DRAWING

NUMBER

DOCUMENT/DRAWING TITLE REV CHG

NO.

COPY

REQ’D

(Y/N)

SOURCE

DOC

(Y/N)

PARA SEC PG CHP

17 TM

SYSTEMS &

SPECIFICAT

IONS

SSPC Painting Manual Volume 2 - N

3. APPENDICES:

3.1. Appendix “J” TGI Job Summary Information Sheet

3.2. Appendix "M" TGI Material List

3.3. Appendix “D” Deficiency Form

4. GENERAL REQUIREMENTS:

4.1 Not Applicable.

5. PROCEDURE:

5.1 Pump out, clean and dry the bilge area located in 1.2.1 free from oil, debris, and other foreign matter.

5.2 Disconnect and reconnect each VCHT piping and hose assembly listed in 1.3.1 for supporting preservation work, using 2.3 and 2.4 for guidance.

5.2.1 Accomplish the requirements of 009-09 of 2.1 for the certification.

5.3 Remove each existing strainer plate assembly listed in 1.3.2, using 2.5 for guidance.

5.3.1 Matchmark, identify and retain each strainer plate assembly.

5.4 Fabricate and install each new strainer plate assembly listed in 1.3.2 in accordance with 2.6, using 2.5 for guidance.

5.4.1 Template from original strainer plate assembly retained in 5.3.1 and to suit existing shipboard conditions.

5.4.2 New strainer material must be CRES Grade 316L.

5.4.3 Dimensions of openings in perforated metal must be of same size as existing.

5.4.4 Accomplish the requirements of 009-12 of 2.1, including Table 2, Column(s) D, Lines One through 7.

5.5 Remove each flanged piping section listed in 1.3.3 from each bilge drain well listed in 1.3.4 and, located in 1.2.1 to the first flange upstream of the bell mouth, using 2.7 for guidance.

5.5.1 Matchmark, identify, and retain each flanged pipe section.

5.6 Restore each piping flange mating surface exposed by removal of the piping system in 5.5, listed 1.3.3 from each bilge drain well listed in 1.3.4, and located in 1.2.1, in accordance with 2.7.

5.6.1 Restore each piping flange mating surface exposed by disassembly of piping system. Repair by removing each high spot, burr, abrasion, and foreign matter, where removal can be accomplished by a hand tool. Maintain phonographic finish on each flange that has it.

C1209.3 Shimizu, 11120180, SS, 7/24/2024

Shinya.Shimizu.ja Line

FOUO

SHIP: DDG-83 CHG/VER: 1/0

5.7 Remove existing and install new each zinc anode listed in 1.3.5 in accordance with 2.8 through 2.11, using 2.12 through 2.14 for guidance.

5.7.1 Accomplish the requirements of 009-12 of 2.1, including Table 2, Column(s) A, Lines One through 7.

5.7.2 Install new washers and new nuts conforming to material list of 2.8 and 2.9.

5.8 Accomplish the requirements of 009-32 of 2.1, including Table 3, Line(s) 13, Column(s) A, for surfaces preparation for inspection each bilge drain well and deck plating listed in 1.3.4 and 1.3.6.

5.9 Accomplish ultrasonic thickness measurement (UTM) on each bilge drain well listed in 1.3.4 in accordance with Paragraph 6.7 of 2.15 and 2.16, using 2.13 and 2.14 for guidance.

5.9.1 Accomplish a visual inspection of each bilge drain well and inner bottom plating listed in 1.3.4 and 1.3.6 for structural integrity, deterioration, pitting, each crack, and area of damage or distortion, using 2.13 and 2.14 for guidance.

5.9.2 Submit one legible copy, in hard copy or approved transferrable media, of a report listing results of the requirements of 5.9 and 5.9.1 to the SUPERVISOR.

5.10 Accomplish the following repairs of each bilge drain well listed in 1.3.4, located in 1.2.1, based on each report in 5.9.2, using 2.13 and 2.14 for guidance, as designated by the SUPERVISOR. See 5.14.3 and 5.14.4.

5.10.1 Remove existing, fabricate and install new a total of 5 square feet of deteriorated bilge drain well bottom plate(s), using 0.5 inch thickness plate conforming to MIL-S-22698 DH-36 for bottom plate, using 2.13 and 2.14 for guidance.

5.10.2 Chip and grind each surface flush in way of each repair.

5.10.3 Base metal weld build-up a total of 29 square inches of each plate defect.

5.10.3.1 For bidding purposes, the weld build-up must be one quarter inch thick.

5.10.3.2 Surface must be ground to sound metal prior to base metal weld build-up.

5.10.3.3 Fill each local pit and groove with weld metal prior to the application of each principal build-up layer.

5.10.3.4 Grind each surface of completed base metal weld build-up smooth if greater than 1/8 inch above plate surface.

5.10.4 Accomplish the requirements of 009-12 of 2.1, including Table 2, Column(s) A, Lines One through 7.

5.10.5 Accomplish the requirements of 009-25 of 2.1 for a local air hose test of new bilge drain well plating weld seams. Allowable leakage: None.

5.11 Accomplish the requirements of 009-32 of 2.1, including Table 3, Line(s) 13, for each area listed in 1.3.6 through 1.3.8.

5.11.1 Power tool clean to bare metal for each area. Accomplish each requirement of Surface Preparation Specification SSPC-SP 11 of 2.17.

5.11.2 Accomplish a visual inspection of each area listed in 1.3.8, including each deck plate and support, grating and support, foundation, piping, piping hanger and liner, and structural member for structural integrity, deterioration, pitting, crack, and area of damage or distortion.

FOUO

SHIP: DDG-83 CHG/VER: 1/0

5.11.2.1 Submit one legible copy, in hard copy or approved transferrable media, of a report listing results of the requirements of 5.11.2 to the SUPERVISOR.

5.12 Install each flanged piping section retained in 5.5, using 2.13 and 2.14 for guidance, in accordance with 2.7.

5.13 Accomplish the requirements of 009-32 of 2.1 for each new and disturbed surface.

5.14 Notes:

5.14.1 Planner: Code 231B N. Kurokawa, 243-0108

Planner: Code 231B T. Ando, 243-4372 Planner: Code 233 M. Yamaguchi, 080-9350-1450 Planner: Code 234 H. Komoto, 243-0975 Engineer: Code 250 T. Ukigai, 243-0954

5.14.2 Work Integration Manager (WIM): Code 333 T. Yaginuma, 080-5419-0598

5.14.3 Removal and installation of interferences, and gas free operation, preservation of boundary spaces relating to front loading structure repair are not included in this TGI. They will be covered by a DL in the future based on Contractor submitted condition report.

5.14.4 Materials for structure members relating to front loading repair will be provided in the future as a DL based on Contractor submitted condition report.

5.14.5 Opening, initial cleaning, and closing of each space listed in 1.2.2 through 1.2.4 will be covered by the following TGI No(s).

Fuel Tank Group-2 (4-78-2-F): 38JC212314A01 (KTR TGI) Fuel Tank Group-2 (5-78-2-F): 38JC212314A01 (KTR TGI) Fuel Tank Group-2 (5-126-2-F): 38JC212316A01 (KTR TGI)

5.14.6 Work per this instruction involves cutting an access (or removal of a door) through a fire zone bulkhead, through the hull of the ship above the turn of the bilge, through ventilation components (ducting, plenums, etc.), or through any air-tight, fume-tight or watertight bulkheads normally used to control air flow in the event of a shipboard fire. A nonflammable closure is required in accordance with COMNAVSEASYSCOM MSG R 261400Z JUL 12. The closure, if not continuously in use, shall be staged near the access, readily visible and accessible, so that any emergency responder can install the closure to affect proper air flow onboard the ship.

5.14.7 This TGI meets the intent of DDG CSWT File Nos. 113-002 and 631-047.

5.14.8 JCNs ER01-ZAN4 and ER01-ZAV4 are related to this TGI.

5.15 Government Furnished Material (GFM):

5.15.1 SRF-JRMC will provide GFM listed in Appendix “M”.

5.16 SRF-JRMC will provide the following service work: (TGI No. 38JC212302S02)

5.16.1 [C740] Crane and rigging service.

5.16.2 [X99E] Utility service, electrical.

5.16.3 [X99M] Utility service, including low pressure air supply, water supply, and steam supply.

5.16.4 [C106.1] Safety inspection for SRF-JRMC employees.

FOUO

SHIP: DDG-83 CHG/VER: 1/0

5.16.5 [C106.2] Gas free inspection for SRF-JRMC employees.

5.16.6 [C133] QA inspection for (G) symbol(s) and review coating application data.

5.16.7 [C250] Technical support for frontload repair work.

FOUO

M-1

SHIP: DDG-83 CHG/VER: 1/0

APPENDIX “M”

TGI MATERIAL LIST

SYSTEM: PLANT NO.: COMPONENT NAME: TYPE: PHASE: REPEAT: CU PH

VERSION:

CASREP

CAT:

VCHT RM 4-110-0-E AY A 0 0

CU PHASE TITLE:

F/O - INSPECT, REPAIR, AND PRESERVE IN VCHT RM NO. ONE

MATERIAL REFERENCES

REF

NO.

DOCUMENT/DRAWING

NUMBER

DOCUMENT/DRAWING TITLE REV

JOB ORDER: KEY OP:

38JC212302 A01

MATERIAL LIST

ITEM

NO.

PC

NO.

REF

NO.

M

C DESCRIPTION

STOCK

NUMBER

GENERIC

MATL

TYPE LVL QA

HAZ

MAT

DOC

NO.

QTY

REQD/

UNIT

QTY

USED/

UNIT

001 M ANODE,CORROSION PRE,

ORIG: C231B, T. ANDO 243-

ORDERED FOR KTR

9B 5342 008136058 NA 4 N 40965154 2/EA

002 M STUD,WEL, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

9B 5307 012813886 NA 4 N 40965156 4/EA

003 M NUT,SELF, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

9B 5310 005957421 NA 4 N 40965157 4/EA

004 M WASHER,L, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

9B 5310 015492705 NA 4 N 40965160 4/EA

NOTES:

FOUO

M-2

SHIP: DDG-83 CHG/VER: 1/0

MATERIAL LIST

ITEM

NO.

PC

NO.

REF

NO.

M

C DESCRIPTION

STOCK

NUMBER

GENERIC

MATL

TYPE LVL QA

HAZ

MAT

DOC

NO.

QTY

REQD/

UNIT

QTY

USED/

UNIT

005 M SHEET, PERFORATED, SHEET,

PERFORATED, SIZE: 3FT X 3FT

X 1/4" THK (10.2#) MATL: ASTM

A240 CLASS 316L, 1/2"DIA

DRILL HOLE, 1-

1/2"TYPICAL(TYP) X

3/4"TYPICAL(TYP).

* PLEASE SEND THE

ATTACHED DRAWING TO

VENDORS FOR RFQ.

ORIG: C231B, T. ANDO 243-

ORDERED FOR KTR

9B 9515 LL9306088 NA 4 N 41707588 1/PM

006 M PLATE,ME, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

QTY: 1 SF

1 FT X 1 FT X 1 PM

9B 9515 002044622 NA 4 N 40965162 1/SF

007 M NUT,HEX,, NUT, SELF

LOCKING, SIZE: 1/2"-13UNJC-

3B, MATL: NICKEL COPPER ALLOY

MONEL,

250D DEG MAX TEMP.

MIL-N-25027D,

BIW CAT# 53416-047

ORIG: C231B, T. ANDO 243-

ORDERED FOR KTR

9Z 5310 LL9302679 NA 4 N 40967478 4/EA

008 M BOLT,MAC, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

9B 5306 016646135 EY NA 4 N 40965163 4/EA

009 M WASHER,F, ORIG: C231B, T.

ANDO 243-4372

ORDERED FOR KTR

9B 5310 011799482 NA 4 N 40965166 4/EA

400 M COUPLING,TUBE, SIZE: ONE

INCH IPS

MATERIAL: CU-NI 90-10

ORDERED FOR: KTR

ORIG: C234 H. KOMOTO 070-

7787-2047

9B 4730 014635857 NA 4 N 41005004 1/EA

401 M COUPLING,TUBE, SIZE: 1/2

INCH IPS

MATERIAL: CU-NI 90-10

ORDERED FOR: KTR

ORIG: C234 H. KOMOTO 070-

7787-2047

9B 4730 014635873 NA 4 N 41005005 1/EA

FOUO: Public availability to be determined under 5 USC 552 SHEET_____OF_____

☐ NUCLEAR APPENDIX "D"

DEFICIENCY FORM

☐ NON-NUCLEAR

1. SHIP/HULL NO.: 2a. DL or DR No.

(Circle One)

2b. REVISION: 3a. COMPONENT NAME: 3b. TYPE: 3c. PHASE: 3d. REPEAT:

DDG-83 VCHT RM 4-110-0-E AY A 0

4a. ICN: 4b. KEY OP: 5. LOC SPACE/LVL: FRAME: P/S/C: 6. CAUSED BY:

38JC212302 A01

7. DESCRIPTION:

8. ORIGINATOR: NAME: BADGE: SHOP/CODE: DATE: PHONE NO.:

9. CORRECTIVE ACTION:

10. EVALUATOR: NAME: BADGE: SHOP/CODE: DATE: PHONE NO.:

FOR NON-NUCLEAR USE ONLY

11. RFD/RFW REQ’D ☐ LAR REQ'D ☐

ILS MOD REQ’D ☐

SRD/PLAN REV REQ'D ☐

DWG NO.: _____________________ S/A NO.: ___________________

12. ISOLATION SIGN: BADGE: SHOP/CODE: DATE: PHONE NO.:

SATISFACTORY:

13. SUBSAFE OQE RECORD? SIGN: BADGE: SHOP/CODE: DATE: PHONE NO.

YES ☐ NO ☐

14. CORRECTIVE ACTION SIGN: BADGE: SHOP/CODE: DATE: PHONE NO.

COMPLETE:

15. INSPECTION REQ’D? INSPECTION COMPLETE/SIGN: BADGE: SHOP/CODE: DATE: PHONE NO.

_________:YES ☐ NO ☐

16. RECORDS REVIEW SIGN: BADGE: SHOP/CODE: DATE: PHONE NO.

COMPLETE (DR ONLY)

DL’s ISSUED

(DR ONLY)

FOUO: Public availability to be determined under 5 USC 552 SHEET_____OF_____

☐ NUCLEAR Deficiency Form Continuation Sheet ☐ NON-NUCLEAR

1. SHIP/HULL NO.: 2a. DL or DR No.

(Circle One) 2b. REVISION: 3a. COMPONENT NAME: 3b. TYPE: 3c. PHASE: 3d. REPEAT:

DDG-83 VCHT RM 4-110-0-E AY A 0

BILGE DRAIN WELL ASSESSMENT FORM

ASSESSOR: HULL: DATE:

ALL ASSESSMENT FORMS SUBMITTED TO SUPERVISOR AND E-MAILED TO SURFMEPP_BILGEWELLASSESSMENT@NAVY.MIL

%Wastage = (Current Thickness – Original Thickness)/Original Thickness

VCHT Room No. 1 (4-110-0-E)

Thickness % Wastage Thickness % Wastage Thickness % Wastage

(in) (in) (in)

(1) (A)

(2) (B)

BELL MOUTH

(C)

(D)

(E)

(F)

(a)

(b)

38JC212302A01 SKETCH

ENCLOSURE-01

Sheet 1 of 1 mailto:SURFMEPP_BILGEWELLASSESSMENT@NAVY.MIL Tomohiko.Ando.ja Line

Sheet 1 of 2

SKETCH

ENCLOSURE-02

PLAN VIEW

4-110-0-E

38JC212302A01

P10

A

B

C

PRESERVATION OF BILGE AREA

Escape Trunk

Sea Chest

10P

10P

10P

4P

Sheet 2 of 238JC212302A01

SKETCH

ENCLOSURE-02

FR 118 LKG FWD

FWD SIDE OF SEA CHEST SHOWN AFT SIM & OPP

2-C

FR 122 LKG AFT

2-A

FR 110 LKG AFT

2-B

Naoki.Kurokawa.ja Polygon

Naoki.Kurokawa.ja_1 Polygon

Naoki.Kurokawa.ja_2 Polygon