Service difficulty report · Vapor Barrier · Boeing 73771B

Difficulty date
October 25, 2022
Submitted
November 14, 2022
Operation
Air carrier
Aircraft
N7854B
Make and model
Boeing 73771B
Aircraft serial
29372
Aircraft time
45,663 hours, 30,470 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

R/H B.S. 663 VAPOR BARRIER IS CRACKED ON UPPER EDGE MID SPAN / FABRICATED REPAIR PLIES USING FIBERGLASS 9-3; STYLE 1581; LOT# 1502472-1 IAW SRM 51-70-04-2R-10 PAR 4.D. OK TO INSTALL REPAIR PLIES.;[06] VERIFIED CORRECTIVE ACTION 5<BR><BR>OK TO INSTALL REPAIR PLIES;[07] INSTALLED PLIES WITH BMS8-301 CLASS 2 LOT NUMBER 1506171-2; VACUUM BAGGED PLIES AND VERIFIED 5X5 USING VACUUM GAUGE ID: ATS2796 DUE: 10/2023; WORK PERFORMED IAW SRM 51-70-04-2R-10 PARAGRAPH 4.D-E;[08] INSPECTED AND VERIFIED CORRECTIVE ACTION 7. 5X5 LEAK CHECKED PASSED PER 51-70-04-2R-10.;[09] CURED PLIES USING THERMOMETER ID: ATS2663 DUE: 09/2023 UNBAGGED PLIES AND LIGHTLY SANDED PLIES; WORK PERFORMED IAW SRM 51-70-04-2R-10 PARAGRAPH 4.F AND H;[10] INSPECTED AND VERIFIED CORRECTIVE ACTION 9.;[11] PERFORM POST CURE NDI IAW SRM 51-70-04-2R-10 PARAGRAPH 4.G;[12] POST REPAIR UT INSPECTED PER 737NDT PART 4 51-00-02. NO DEFECTS FOUND. TOOL E650 ATS2031 DUE 03/2023;[13] REFINISHED REPAIR AREAS IAW SRM 51-70-04-2R-10-2R-10 PARAGRAPH 4.H;[14] VERIFIED CORRECTIVE ACTION 13;[15] VERIFIED CORRECTIVE ACTION 13

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