SDR SWAA2026082199705

Service difficulty report · Door Sill · Boeing 7377K9

Difficulty date: July 27, 2026
Submitted: August 22, 2026
Operation: Air carrier
Aircraft: N7878A
Make and model: Boeing 7377K9
Aircraft serial: 34320
Aircraft time: 63,499 hours, 33,124 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Door Sill
Condition: Corroded
Location: Zone 100
Stage of operation: IN
How discovered: E
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 UPPER SILL DOOR CUTOUT BS 480, WL 198, RBL 68 IN THEFWD CARGO BAY. REPLACED UPPER SILL WEB & FASTENERS LOCATED ON DOOR CUTOUT BS 440 - 492.40 IN THE FWD CARGO BAY IAW SRM 51-40-02-0G-0, DWG 143A8111, SHEET 12, REV A, & DWG# 143A8110, SHEET 20, REV -.

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