Service difficulty report · Bulb · Boeing 73771B

Difficulty date
October 18, 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
Bulb
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 R/H COMPOSITE BULKHEAD AT BS663 RBL34 WL156. / 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.;[07] VERIFIED CORRECTIVE ACTIONS 4 AND 6<BR><BR>VALIDATED REPAIR PER SRM 51-70-04-2R-10<BR><BR>VERIFIED MEASUREMENTS TABLE;[08] INSTALLED REPAIR PLIES USING RESIN BMS 8-301; CLASS 1; EA9390; LOT# JH2EAA8895. <BR>VACUUM BAGGED REPAIRS; CHECKED VACUUM BAG FOR LEAKS; VACUUM BAG CHECKED GOOD AND SET REPAIRS TO CURE.<BR>WORK ACCOMPLISHED IAW SRM 51-70-04-2R-10 PAR 4.D-F.<BR><BR>CALIBRATED TOOLS USED:<BR>VACUUM GAUGE: ID: E11543; CAL DUE DATE: 09/2023<BR>HOT BONDER MACHINE: ID: NCX000526; CAL DUE DATE: 10/2022;[09] VERIFIED CORRECTIVE ACTION 8;[10] CONFIRMED CURE; UNBAGGED AND LIGHTLY SANDED REPAIR IAW SRM 51-70-04-2R-10 PARA 4F-G;[11] INSPECTED AND VERIFIED CORRECTIVE ACTIONN 10.;[12] REQUESTING POST CURE NDI OF REPAIR IAW SRM 51-70-04-2R-10 PAR. 4.G.;[13] POST REPAIR UT INSPECTED PER 737NDT PART 4 51-00-02. NO DEFECTS FOUND. TOOL E650 ATS 2341 DUE 06/2023.;[14] REFINISHED REPAIR AREAS IAW SRM 51-70-04-2R-10 PARA 4H<BR><BR>INSTALLED 3EA NEW ALUMINUM FOIL MARKERS IAW AMM 20-10-21-400-802 PARA 3B-C;[15] FINAL INSPECTION. JOB COMPLETE.;[16] FINAL INSPECTION. JOB COMPLETE.

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