SDR SWAA2022042790196

Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date: March 31, 2022
Submitted: April 27, 2022
Operation: Air carrier
Aircraft: N475WN
Make and model: Boeing 7377H4
Aircraft serial: 32474
Aircraft time: 59,744 hours, 35,276 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Intercostal
Condition: Cracked
Location: Bs 294-312
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

CRACKED INTERCOSTAL AT BS 294.5-312; RBL 15; WL 208.1. INSTALLED FOD PROTECTION FROM BS277 - BS328, BL 0 - RBL 30, WL 198 IAW AMM 20-60-07-913-801. REMOVED ALL FASTENERS FROM INTERCOSTAL IAW SRM 51-40-02-0G-0. REMOVED STIFFENER AT BS 312 RBL 24 AND INTERCOSTAL AT BS 294.5-BS312 RBL 36 IAW SRM 51-40-02-0G-0, LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05-0G-0. INSTALLED THE INTERCOSTAL IAW SRM 51-40-02 AND DRAWING 141A5400 SH. 9.

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