Service difficulty report · Barrier · Boeing 7377H4

Difficulty date
July 22, 2022
Submitted
August 10, 2022
Operation
Air carrier
Aircraft
N930WN
Make and model
Boeing 7377H4
Aircraft serial
36636
Aircraft time
44,026 hours, 26,491 cycles
Part
Barrier
Condition
Cracked
Location
Center Wing
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

RH STA 663 VAPOR BARRIER CRACKED AT RBL 25. / [01] MEASUREMENTS;[02] CLEANED R/H VAPOR BARRIER ;PREPARED DAMAGE AREA FOR REPAIR; STOP DRILL ALL CRACKS AS PER B737 SRM 51-70-04-2R-10;[03] PERFORMED DRY OUT ON VAPOR BARRIER; FOUND NO WATER AS PER B737 SRM 51-70-04-2R-10;[04] VERIFIED STEPS 1 ;2 & 3 AND OK TO INSTALL REPAIR;[05] REPAIRED CRACK DAMAGE ON R/H VAPOR BARRIER WITH A PERMANENT REPAIR AS PER B737 SRM 51-70-04-2R-10;[06] PERFORMED TAP TEST ON REPAIRED AREA ;FOUND NO DELAMINATION AS PER B737 NDT 51-05-01 SECTION 5;[07] VERIFIED STEPS #5 AND #6.;[08] OK TO APPLY PRIMER AND TOP COAT.;[09] APPLIED TREAT AND PRIMER AT VAPOR BARRIER REPAIR AS PER REF B737-700 AMM 51-21-73-370-803;[10] APPLIED TOP COAT AT VAPOR BARRIER REPAIR AS PER REF B737-700 AMM 51-21-73-370-803;[11] VERIFIED STEPS 9 AND 10.

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