SDR SWAA2026092842020

Service difficulty report · Sidewall Support · Boeing 7378H4

Difficulty date: August 21, 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: Sidewall Support
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

CORROSIN HAS FOUND AT FLOOR TO SIDEWALL SUPPORT FROM BS 500D+15 TO 500I, WL: 156, L-20. REMOVED AND REPLACED FCB FLOOR TO SIDEWALL SUPPORT AT BS 484 TO 500I LBL25 WL156 IAW SRM 53-00-53-2R-5, SRM 51-40-02-0G-0, DWG 143A7500, REV -. AND EA M-22-153-01550.

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