Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
June 20, 2022
Submitted
July 28, 2022
Operation
Air carrier
Aircraft
N485WN
Make and model
Boeing 7377H4
Aircraft serial
32473
Aircraft time
60,155 hours, 35,804 cycles
Part
Vapor Barrier
Condition
Cracked
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

LEFT W/W VERTICAL VAPOR BARRIER CRACKED / [01] MEASUREMENTS;[02] CLEANED AND PREPARED DAMAGE AREA FOR REPAIR; STOP DRILL CRACKS; AND PERFORMED DRY OUT; FOUND NO WATER AS PER B737 SRM 51-70-04-2R-10;[03] VERIFIED STEP #1 AND #2;[04] OK TO INSTALL REPAIR;[05] REPAIRED CRACK DAMAGE ON L/H VAPOR BARRIER WITH A PERMANENT REPAIR AS PER B737 SRM 51-70-04-2R-10; MATERIALS USED PO#1690463 AND PO#1753794;[06] PERFORMED TAP TEST ON REPAIRED AREA; FOUND NO DELAMINATION AS PER B737 NDT 51-05-01 SECTION 5;[07] CORRECTED TABLE MEASUREMENT FROM 25' TO CORRECT MEASUREMENT 17';[08] VERIFIED STEPS 5; 6 AND 7;[09] APPLIED TOPCOAT AND TEFLON ON LEFT W/W VERTICAL VAPOR BARRIER AS PER B737-700 AMM 51-21-81-370-802 AND 28-11-00-600-801;[10] STOP DRILL CRACKS AND PERFORMED DRY OUT ON LEFT W/W VERTICAL VAPOR BARRIER AS PER B737 SRM 51-70-04-2R-10. REPAIRED WITH A PERMANENT REPAIR; CRACK ON L/H VAPOR BARRIER AS PER B737 SRM 51-70-04-2R-10; MATERIALS USED PO#1690463 AND PO#1753794. PERFORMED TAP TEST ON REPAIRED AREA; NO DELAMINATION FOUND AS PER B737 NDT 51-05-01 SECTION 5. APPLIED TOPCOAT AND TEFLON AS PER B737-700 AMM 51-21-81-370-802 AND 28-11-00-600-801.;[11] VERIFIED STEPS 9 AND 10; TASK COMPLETE

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