SDR SWAA2026061002373

Service difficulty report · Door Sill · Boeing 7377BD

Difficulty date: May 13, 2026
Submitted: June 11, 2026
Operation: Air carrier
Aircraft: N7749B
Make and model: Boeing 7377BD
Aircraft serial: 36724
Aircraft time: 50,992 hours, 27,256 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Door Sill
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 UPPER MAIN SILL ON UPPER SURFACE LOCATED BTW BS 794 TO 847, STR 18R, WL 198 IN THE AFT CARGO BAY. REPLACED UPPER MAIN SILL LOCATED BTW BS 794.37 - 847, STR 18R, WL 198 IAW SRM 51-10-02, ITEM 9, AND DWG 146A0080, SHEET 16, REV A, & DWG 146A8111, SHEET 16, REV-.

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