Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
March 8, 2023
Submitted
April 11, 2023
Operation
Air carrier
Aircraft
N290WN
Make and model
Boeing 7377H4
Aircraft serial
36632
Aircraft time
51,201 hours, 30,730 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

LT VAPOR BARRIER WEB IS CRACKED; STA 663.<[01] MEASUREMENTS;[02] REMOVED THE DAMAGED PLIES; NO WATER NOTE AT REPAIR AREA AND PREPARED DAMAGED AREA TO APPLY THE GLASS FABRIC REPAIR PLIES ON LT VAPOR BARRIER WEB. REF B737 SRM 57-10-10-2R-2 PARAGRAPH 1 C. AND SRM 51-70-04-2R-10 PARAGRAPH 4.;[03] CORRECTION STEP 2.<BR>REMOVED THE DAMAGED PLIES; NO WATER INPREGNATION NOTED AT REPAIR AREA.PREPARED DAMAGED AREA TO APPLY THE GLASS FABRIC REPAIR PLIES ON LT VAPORBARRIER WEB. REF B737 SRM 57-10-10-2R-2 PARAGRAPH 1 C. AND SRM 51-70-04-2R-10PARAGRAPH 4;[04] VERIFIED STEP 1;[05] VERIFIED STEP 3;[06] OK TO APPLY REPAIR;[07] REPAIRED CRACK DAMAGE ON LT VAPOR BARRIER AT STA 663 WITH A PERMANENT REPAIR AS PER B737 SRM 51-70-04-2R-10. MATERIALS USED PO#1800550 AND PO#1694548;[08] PERFORMED TAP TEST ON REPAIRED AREA ;FOUND NO DELAMINATION AS PER B737 NDT 51-05-01 SECTION 5;[09] VERIFIED STEP NO 7 AND 8. OK TO PAINT.;[10] APPLIED PRIMER AND TEFLON PAINT ON LT VAPOR BARRIER WEB REF B 737 AMM 51-21-72-370-804 AND 51-21-81-370-802;[11] VERIFIED STEP 10

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