Service difficulty report · Web · Boeing 7377H4

Difficulty date
August 15, 2022
Submitted
August 26, 2022
Operation
Air carrier
Aircraft
N212WN
Make and model
Boeing 7377H4
Aircraft serial
32485
Aircraft time
58,046 hours, 34,711 cycles
Part
Web
Condition
Cracked
Location
Center Wing Box
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

STA 663 LEFT HAND CENTER TANK LOWER ATTACH ANGLE COMMON TO VAPOR BARRIER WEB IS CRACKED AT LBL 6.8 (JUST OB OF KEEL BEAM) AND WL 167.68 / [01] APPLIED EWIS PROTECTION TO REPAIR AREA IAW AMM 20-60-07;[02] REMOVED ALL FASTENERS IN AREA AND CUT OUT DAMAGED SECTION OF ANGLE IAW SRM 57-10-10-2R-5;[03] PERFORMED DETAILED VISUAL INSPECTION OF REPAIR AREA AND UNDERLYING STRUCTURE; NO DEFECTS NOTED IAW SRM 57-10-10-2R-5;[04] VERIFIED STEPS 1 - 3 ARE COMPLETE;[05] RECEIVED -1 REPLACEMENT ANGLE FABRICATED ON BACK SHOP W/O 44079-5000-0001 AND -2 SPLICE ANGLE FABRICATED ON BACK SHOP W/O 44079-5000-0002 IAW SRM 51-10-10-2R-5;[06] VERIFIED ACTION 5 IS COMPLETE;[07] HFEC IAW B737 NDT PART 6; 51-00-00 PROC 16. NO DEFECTS NOTED. TOOL#31823; DUE 23DEC22;[08] VERIFIED STEPS 2; 3 & 5 C/W;[09] FABRICATED REPAIR PARTS IAW SRM 57-10-10-2R-5;[10] VERIFIED STEP 9 C/W; OK GIVEN TO TREAT AND PRIME;[11] APPLIED ALODINE AND PRIMER REPAIR PARTS IAW SRM 51-20-01 AND AMM 51-21-72-370-804;[12] VERIFIED STEP 11 C/W; OK GIVEN TO INSTALL REPAIR PARTS;[13] FAULT TTG8Q00EA1AG GENERATED TO TRACK EWIS PROTECTION;[14] INSTALLED ALL REPAIR PARTS IAW SRM 57-10-10-2R-5 REPAIR 5. ALL FASTENERS INSTALLED WET WITH BMS5-95 B-2 MIXED AT 1200 19AUG22. SQUEEZE OUT AT 1600 19AUG22; FINAL CURE AT 1200 21AUG22. ALL PERMANENT FASTENERS INSTALLED BEFORE SQUEEZE OUT.;

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