# SDR SWAA2026071398475

- 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/SWAA2026071398475

## Discrepancy

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,

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.