Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
August 5, 2026
Submitted
September 2, 2026
Operation
Air carrier
Aircraft
N954WN
Make and model
Boeing 7377H4
Aircraft serial
36669
Aircraft time
49,596 hours, 30,444 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
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

CRACK ON VAPOR BARRIER LOC. BS 663 BETWEEN LBL 30 TO LBL 45 AT MAIN WHELL WELL 472825 ON STEP 11 ULTRASONIC FLAW DETECTOR P/N: EPOCH 650 S/N: 190776902 DUE DATE: 11-NOV-26. REPAIRED VAPOR BARRIER LOC. BS 663 BETWEEN LBL 30 TO LBL 45 AT MAIN WHELL WELL IAW B737-700 SRM 51-70-04-2R-10 REPAIR 10. SEE INDIVIDUAL SIGNOFF BELOW. REPAIRED VAPOR BARRIER LOC. BS 663 BETWEEN LBL 30 TO LBL 45 AT MAIN WHELL WELL IAW B737-700 SRM 51-70-04-2R-10 REPAIR 10. SEE INDIVIDUAL SIGNOFF BELOW.

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