Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
June 20, 2024
Submitted
July 30, 2024
Operation
Air carrier
Aircraft
N481WN
Make and model
Boeing 7377H4
Aircraft serial
29853
Aircraft time
66,500 hours, 39,674 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Zone 100
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

RWW FWD SIDE OF VAPOR BARRIER CRACKED AT 4 EACH FASTENER HOLES ALONG LWR EDGE ABOVE PACK AIR HEAT EXCHANGR OUTLET RBL 18. 8-19<[01] APPLIED REPAIR ON RWW FWD SIDE VAPOR BARRIER AT 4 EACH FASTNER HOLES AND CURED PER B737 SRM 51-70-04-2R-9 PARAGRAPH 4.K AND 4.M AND B737 SRM 51-70-04-2R-0 PARAGRAPH 4.L AND 4.N. MATERIALS USED RESIN EY3804 P/O#1759622; CLOTH BMS-9-3 P/O#1738579. TOOLS USED TEMP CONTROLLER ID 160354; CALIBRATION DUE: 03-07-25. AND APPLIED TOPCOAT AT RWW FWD SIDE OF VAPOR BARRIER ON REPAIR AREA PER B737 AMM51-21-72-370-802 PRIMER USED 512X310QTKT PO#2059196;[02] VERIFIED COMPOSITE REPAIR ON VAPOR BARRIER.

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