Service difficulty report · Angle · Boeing 7377H4

Difficulty date
June 27, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
45,460 hours, 27,871 cycles
Part
Angle
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
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

B.S. 663 LOWER COMPOSITE BULKHEAD UPPER ATTACH ANGLE IS CRACKED AT L.B.L. 45; W.L. 165.<[01] UPDATED STEP 1 AND 2;[17] FABRICATED SPLICE REPAIR FROM 2024 T3 0.071' LOT. 1508358-1 IAW SRM 57-10-10-2R-5; APPLIED CHEMICAL CONVERSION IAW SOPM 20-43-03; REQ. OR TO PRIME;[23] INSTALLED ALL FASTENERS COMMON TO FUER TANK IAW SRM 57-10-10-2R-5 AND DWG 111A1000 REV:A;[24] VERIFIED CORRECTIVE ACTION ITEM 23.;[25] PARTIAL ENTRY STEPS 3;5;6.;[26] REQUEST OK TO INSTALL FASTENERS AT REPAIR ANGLE BETWEEN LBL 25 TO LBL 55 ; BS 663 ; WL 167.;[27] OK TO INSTALL FASTENERS AT REPAIR ANGLE BETWEEN LBL 25 TO LBL 55 ; BS 663 ; WL 167 GIVEN; AND PARTIAL UPDATED STEPS 3;5;6.;[28] UPDATE STEPS 3;5 AND 6.;[29] INSTALLED NEW FASTENERS AT REPAIR ANGLE BETWEEN LBL 25 TO LBL 55 ; BS 663 ; WL 167 IAW SRM 57-10-1--2R-5 REPAIR 5 AND DWG:111A1000;[30] OK TO APPLY CAP SEAL AT FASTENERS AFT SIDE L/H VAPOR BARRIER BS 663

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