SDR SWAA2026071661545

Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date: June 18, 2026
Submitted: July 17, 2026
Operation: Air carrier
Aircraft: N930WN
Make and model: Boeing 7377H4
Aircraft serial: 36636
Aircraft time: 55,646 hours, 33,976 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Condition: Corroded
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

CORROSION ON WEB INTERCOSTAL UPPER SILL LOCATED BS 827 PLUS 4 INCH AT LEVEL S-18R AND WL 200 AFT CARGO COMPARTMENT. REPLACED WEB INTERCOSTAL UPPER SILL AND FASTENERS LOCATED BS 827 PLUS 4 INCH AT LEVEL S-18R AND WL 200 AFT CARGO BAY IAW SRM 51-40-02-0G-0, DWG 143A8310 SHEET 16 REV A, & DWG 143A8310 SHEET 15 REV A.

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