Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
April 26, 2023
Submitted
May 30, 2023
Operation
Air carrier
Aircraft
N416WN
Make and model
Boeing 7377H4
Aircraft serial
32453
Aircraft time
70,967 hours, 42,001 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CRACK ON BS 663 VAPOR BARRIER BULKHEAD AT LBL 28 WL 151.<[01] REMOVED BS 663 VAPOR BARRIER BULKHEAD AT LBL 28 WL 151 IAW SRM 51-40-02-0G-0;[02] LOCATED AND DRILLED NEW LH BS663 VAPOR BARRIER BLKHD IAW SRM 51-40-05 AND DWG #111A1000.;[03] VERIFIED CORRECTIVE ACTION 2.;[04] VERIFIED PARTIAL STEPS 1-7.;[05] OK TO INSTALL LH BS663 VAPOR BARRIER BLKHD.;[06] OK TO INSTALL IS GIVEN;VERIFIED CORRECTIVE ACTION 5.;[07] COMPLETED STEP 1-6 IAW SRM 51-40-02.;[08] INSTALLED NEW LH BS663 VAPOR BARRIER BLKHD IAW SRM 51-40-02 AND DWG #111A1000.;[09] UPDATED STEP 1 THROUGH 7;[10] VERIFIED CORRECTION ACTION ITEM 8 PARTIAL INSTALL AND MEASUREMENT TABLE.;[11] UPDATED STEP 4;[12] UPDATED STEP 8;[13] INSTALLED NEW LH BS663 VAPOR BARRIER BLKHD IAW SRM 51-40-02; DWG #111A1000 DWG #ATSHFAB-101-209; DWG #144A7100 AND DWG 111A7000.;[14] COMPLETED STEP 1-6;[15] CHANGED STEPS 1 THROUGH 6 TO PARTIAL;[16] CAP SEALED AND APPLIED PLACARDS IAW AMM 51-31-00-390-805; AIPC 11-22-06-01 AND AMM 11-00-00-201.;[17] UPDATED STEP 8 TO PATRIAL;[18] VERIFIED STEPS 1;2;3;4;5; AND 6 COMPLETE AND CORRECTIONS ACTION ITEM 11;12;13;14;15 AND 16.;[19] UPDATED MEASUREMENT TABLE;[20] UPDATED STEP 8;[21] VERIFIED PARTIAL STEP 8.;[22] UPDATED STEP 8;[23] UPDATED STEP 7 AND 8.;[24] VERIFIED STEPS 7 AND 8 (PARTIAL);[25] ALL WORK COMPLETE;[26] VERIFIED ALL STEPS 1; 2; 3; 4; 5; 6; 7; 8; ALL STEPS COMPLETE AND CARD COMPLETE.

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