SDR SWAA2026092813491

Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date: August 25, 2026
Submitted: September 29, 2026
Operation: Air carrier
Aircraft: N8643A
Make and model: Boeing 7378H4
Aircraft serial: 42524
Aircraft time: 39,924 hours, 19,432 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Condition: Corroded
Location: Zone 200
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

FOUND CORROSION ON FLOOR SUPPORT, BS 328+5 - 328+12, LBL 22, WL 208. REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-40-02-0G-0, AND DWG 141A5730, REV A. NUT PLATE DEBONDED AND TWO FASTENERS ARE NOT INSTALLED AT BS 344, LBL 22. AFTER INTERCOSTAL INSTALLED 2 FASTENERS AT BS LBL 22 AND 3 NUTPLATES INSTALLED IAW SRM 51-40-02-0G-0.

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