Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
March 10, 2022
Submitted
April 7, 2022
Operation
Air carrier
Aircraft
N240WN
Make and model
Boeing 7377H4
Aircraft serial
32503
Aircraft time
53,442 hours, 31,881 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

RT SIDE VAPOR BARRIER AT STA 663 FOUND CRACKED / [01] PERFORMED VISUAL INSPECTION AND TAP TEST INSPECTION AT VAPOR BARRIER AT STA 663 FOUND CRACK 19'' OF LENGTH. REF B737-700 NDT PART 1 51-05-01PARAGRAPH 5.;[02] DRILLED STOP DRILL ON THE CRACK END. REF 57-10-10-2R-2 REPAIR 2PARAGRAPH 4 B.;[03] PREPARED THE DAMAGED AREA TO DRY OUT. REF B737-700 SRM 57-10-10-2R-2; SRM 51-70-04-2R-10 REPAIR 10 PARAGRAPH 4 B AND C AND SRM 51-70-04-2R-0 PARAGRAPH 4 D.;[04] VERIFIED 1-3. OK TO DRY OUT.;[05] PERFORMED DRY OUT ON RT SIDE VAPOR BARRIER IN DAMAGE AREA; FOUND NO WATER AS PER B737 SRM 51-70-04-2R-10;[06] VERIFIED STEP 5. OK TO INSTALL REPAIR.;[07] REPAIRED CRACK DAMAGE ON RT VAPOR BARRIER AT STA 663 WITH A PERMANENT REPAIR ASPER B737 SRM 51-70-04-2R-10;[08] PERFORMED TAP TEST ON REPAIRED AREA ON RT VAPOR BARRIER; FOUND NO DELAMINATION AS PER B737 NDT 51-05-01 SECTION 5;[09] VERIFIED STEPS 7 AND 8.;[10] OK TO PRIME AND TOPCOAT.;[11] APPLIED PRIMER & TOP COAT AT REWORKED AREA OF REVEAL; AS PER B737-7 AMM 51-21-72-370-804 & 51-21-73-370-803.;[12] CORRECTION ON STEP #11:APPLIED PRIMER & TOP COAT AT REPAIRED VAPOR BARRIER WEB; AS PER B737-7 AMM 51-21-72-370-804 & 51-21-73-370-803.;[13] VERIFIED STEPS 11 AND 12;[14] TASK C/W;[15] TASK C/W

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