SDR SWAA2026071398475

Service difficulty report · Floorbeam · Boeing 7378

Difficulty date: May 14, 2026
Submitted: July 14, 2026
Operation: Air carrier
Aircraft: N8705Q
Make and model: Boeing 7378
Aircraft serial: 42558
Aircraft time: 21,339 hours, 9,887 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
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

AFT CABIN FLOORBEAM UPPER FLANGE HAS EVIDENCE OF CORROSION AT BS 947, RBL 25. JUST BELOW LAV ATTACH FITTING, TTG8Q01C6CMA. MEASURED CORROSION TO BE 0.020 DEEP REMAINING THICKNESS IS 0.160 FLOORBEAM UPPER FLANGE IS OUT OF LIMITS IAW SRM 53-70-51-1A-1. REPAIRED FLOORBEAM IAW SRM 53-70-51-2R-5 AND EA 26-153-01429-WIP 1, WIP 2, WIP 3, WIP 4,

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