Service difficulty report · Attach Angle · Boeing 7378H4

Difficulty date
October 28, 2025
Submitted
November 20, 2025
Operation
Air carrier
Aircraft
N8507C
Make and model
Boeing 7378H4
Aircraft serial
41531
Aircraft time
29,852 hours, 15,036 cycles
Part
Attach Angle
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
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

CRACK FOUND ON BS 663 LT ATTACH ANGLE, LBL 34. REMOVED TANK FASTENERS FROM LBL 34 TO LBL 65. CUT AND REMOVED DAMAGED SECTION OF ATTACH ANGLE IAW SRM 57-10-10-2R-5. CW NDT INSPECTIONS OF HOLES COMMON TO REPAIR IAW PART 6 51-00-00. PROCEDURE 16, AND PERFORMED NDT REQUIREMENT FOR CUTOUT OF DAMAGE IAW PART 6, 51-00-00 PROCEDURE 23. NO DEFECTS NOTED. LOCATED AND DRILLED REPLACEMENT ATTACH ANGLE, FASTENER HOLES IAW SRM 57-10-10-2R-5. INSTALLED TANK FASTENERS IAW SRM 57-10-10-2R-5. CAP SEALED FUEL TANK FASTENERS COMMON TO THE LT ATTACH ANGLE PER SRM 57-10-10-2R-5.

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