SDR SWAA2021072797588

Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date: July 23, 2021
Submitted: July 27, 2021
Operation: Air carrier
Aircraft: N495WN
Make and model: Boeing 7377H4
Aircraft serial: 33869
Aircraft time: 56,617 hours, 33,403 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Stiffener
Condition: Cracked
Location: Bs 540 Bl0
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

TRANSFERRED FROM MXI TTG8Q005WAHL; STA. 540 CRACK AT BL-0 VERTICAL STIFFENER; 4 INCHES DOWN FROM TOP OF CENTER TANK. REMOVED CRACKED VERTICAL STIFFENER IAW SRM 51-40-02-0G-0. VERTICAL STIFFENER FOUND TO BE OUT OF LIMITS IAW SRM 51-10-02-0G-0 STEP 9. LOCATED AND DRILLED VERTICAL STIFFENER IAW SRM 51-40- 05 DWG 11A2001 AND DWG 11A6000. INSTALLED VERTICAL STIFFENER IAW SRM 51-40-02-0G-0 AND DRAWING # 111A2001 SHT. 55.

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