Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
June 11, 2021
Submitted
July 7, 2021
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
32,578 hours, 19,816 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Bs 663
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

CRACKED LOWER L/H COMPOSITE BULKHEAD AT BS663 LBL36 WL159. ; / [01] IDENTIFIED BS663 VAPOR BARRIER IAW SRM 57-10-10-0I-2 FIGURE 2 ITEM 4 AND TABLE 2 ITEM 4. DAMAGE IS BEYOND ALLOWABLE LIMITS IAW SRM 57-10-10-1A-2 PARA 4.D.(1) AND WILL BE REPAIRED IAW SRM 51-70-04-2R-10 PER SRM 57-10-10-2R-2 PARA 1.C. REMOVED MULTIPLE AREAS OF CRACK DAMAGE AND PREPARED DAMAGE AREA FOR REPAIR IAW SRM 51-70-04-2R-10 PARA 4.A-C.; [02] CERTIFIED IDENTIFICATION; ALLOWABLE DAMAGE; REPAIR AND DAMAGE REMOVAL IAW SRM 57-10-10-0I-2; SRM 57-10-10-1A-2; SRM 57-10-10-2R-2 AND SRM 51-70-04-2R-10.; [03] VALIDATED APPLICABILITY OF SRM 51-70-04-2R-10.; [04] VERIFIED CORRECTIVE ACTION STEPS 1-3; [05] FABRICATED FWD REPAIR PLIES OUT OF BMS 9-3 ST 1581 LOT#1458851-1 IAW SRM 51-70-04-2R-10 PAR 4D. OK TO INSTALL.; [06] VERIFIED FABRICATION OF FWD REPAIR PLIES IAW SRM 51-70-04-2R-10 PAR 4; OK TO INSTALL; [07] INSTALLED REPAIR PLIES USING BMS 8-301 LOT#1454403-1; VACUUM BAGGED AND CHECKED FOR LEAKS USING PRESSURE GAGE ID:ATS2587 S/N:5432766772 IAW SRM 51-70-04-2R-10 PAR 4D-E.; [08] VERIFIED INSTALLATION OF REPAIR PLIES USING; VACUUM BAGGED AND CHECKED FOR LEAKS IAW SRM 51-70-04-2R-10;

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