Service difficulty report · Vapor Barrier · Boeing 7377BD

Difficulty date
June 8, 2022
Submitted
June 27, 2022
Operation
Air carrier
Aircraft
N7737E
Make and model
Boeing 7377BD
Aircraft serial
33929
Aircraft time
50,078 hours, 25,303 cycles
Part
Vapor 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

C/R RT STA 663 VAPOR BARRIER CRACKED IN MULTIPLE AREAS MARKED WITH RED DOTS / [01] REMOVED THE DAMAGED PLIES AND PREPARED DAMAGED AREA TO APPLY DRY OUT. DRILLED STOP HOLES AT THE CRACKS END. REF B737-700 SRM 57-10-10-2R-2 PARAGRAPH 6 AND SRM 51-70-04-2R-10 REPAIR 10 PARAGRAPH 4.;[02] VERIFIED STEP 1; OK TO DRY OUT;[03] PERFORMED DRY OUT AT DAMAGED AREA ON RT STA 663 VAPOR BARRIER. REF B737-700 SRM 57-10-10-2R-2 PARAGRAPH 6 AND SRM 51-70-04-2R-10 REPAIR 10 PARAGRAPH 4 B.;[04] VERIFIED STEP 3<BR>OK TO INSTALL REPAIR;[05] REPAIRED VAPOR BARRIER R/H AS PER B-737 SRM 51-70-04-2R-10 REPAIR 10. MATERIAL USED EY3804 A/B PO# 1753794 PLUS BMS9-3-120TYD CL7 PO#1690463;[06] VERIFIED STEP 5<BR>OK TO TOP COAT;[07] TOP COATED R/H VAPOR BARRIER AS PER REFERENCE B737-700 AMM 51-21-72-370-804 AND AMM 51-21-81-370-802.;[08] LATE ENTRY: APPLIED PRIMER AT R/H VAPOR BARRIER AS PER REFERENCE B737-700 AMM 51-21-72-370-804.;[09] VERIFIED STEPS 7 AND 8.

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