Service difficulty report · Attach Angle · Boeing 7378H4

Difficulty date
June 15, 2023
Submitted
July 19, 2023
Operation
Air carrier
Aircraft
N8543Z
Make and model
Boeing 7378H4
Aircraft serial
63587
Aircraft time
19,500 hours, 9,726 cycles
Part
Attach 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

L/H BS663 UPPER ATTACH ANGLE IS CRACKED ON VAPOR BARRIER LBL8 WL167.68<[01] VERIFIED APPLICABILITY OF SRM 57-10-10-2R-5.;[07] REQUIRED NDI HFEC FOR OPEN HOLES AND CRACK FREE CUT OUT ON REPAIR AREA L/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER LBL6-22 WL167.68 IAW SRM 57-10-10-2R-5 PAR. C.[09] FABRICATED; LOCATED; DRILLED; APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA L/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER LBL6-22 WL167.68 IAW SRM 57-10-10-2R-5 PAR. E-K. REPLACEMENT ANGLE MATERIAL USED 2024T3 CLAD 0.063' LOT# 1507920-1. AND SPLICE ANGLE MATERIAL USED 2024T3 CLAD 0.071' LOT# 1501822-1.;[10] CAP SEAL OF FUEL TANK REPAIR FASTENERS L/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER LBL6-22 WL167.68 IS DOCUMENTED ON NRC TTG8Q00LNQZR STEP 6.;[14] INSTALLED FASTENERS OF HORIZNTAL FLANGE OF L/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER LBL6-22 WL167.68 IAW SRM 57-10-10-2R-5 PAR.L.;[15] RII VERIFIED CORRECTIVE ACTION ITEM 14.;[16] INSTALLED 100% TEMPORARY AND PERMANENT FASTENERS ON VERTICAL FLANGE OF L/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER LBL6-22 WL167.68 BEFORE SQUEEZE OUT TIME EXPIRE 24 JUN 2023 10:00 UTC IAW SRM 57-10-10-2R-5 PAR.L; DWG 111A1000 AND SOPM 20-50-19.;

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