# SDR SWAA2026071398474

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2026
- Submitted: July 14, 2026
- Operation: Air carrier
- Aircraft: [N8705Q](https://openairdocs.org/aircraft/N8705Q), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 42558
- Aircraft time: 21,339 hours, 9,887 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026071398474

## Discrepancy

AFT CABIN FLOORBEAM UPPER FLANGE HAS EVIDENCE OF CORROSION AT BS 947, RBL 51, JUST BELOW LAV ATTACH FITTING.   MEASURED CORROSION TO BE 0.060, DEEP REMAINING THICKNESS IS 0.120, FLOORBEAM UPPER FLANGE IS OUT OF LIMITS IAW SRM 53-70-51-1A-1.   CUT AND REMOVED THE DAMAGED FLANGES OF THE FLOORBEAM BS 947, LBL 8 TO RBL 60 IAW 53-70-51-2R-5, ALTERNATIVE 270-51-2R-5; ALTERNATIVE 2 AND EA 26-153-01429. CORRECTIVE ACTION NR 2 WAS ACCOMPLISHED IAW SRM 53-70-51-2R-5; ALTERNATIVE 2.

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