Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
December 6, 2020
Submitted
December 9, 2020
Operation
Air carrier
Aircraft
N254WN
Make and model
Boeing 7377H4
Aircraft serial
32512
Aircraft time
49,108 hours, 29,303 cycles
Part
Vapor Barrier
Condition
Cracked
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FOUND CRACK ON VAPOR BARRIER LOWER LEFT WEB STA 663.75 LBL 48 LENGTH: 2'. CRACK IS WITHIN ALLOWABLE DAMAGE LIMITS, PER SRM 57-10-10-1A-2(4) NOT MORE THAN 16 INCH ZONE 1. PERFORMED INTERMIN REPAIR, PER SRM57-10-10-1A-2(4)(A). VISUAL INSPECTION OF REPAIR AREA AT 1200 FLT CYCLES OR MORE FREQUENTLY. ENSURE CRACK HAS NOT GROWN PAST THE INTERIM SEAL. IF ADDITIONAL DAMAGE IS FOUND DURING VISUAL INSPECTION AND THE COMBINED DAMAGE IS MORE THAN 20 INCHES, THEN YOU MUST REPLACE INTERIM REPAIR WITH PERMANENT REPAIR. MORE THAN ONE CRACK IS PERMITTED ON THE LEFT AND RIGHT OF BL 0.0.

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