# SDR SWAA2025090804491

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2025
- Submitted: September 8, 2025
- Operation: Air carrier
- Aircraft: [N447WN](https://openairdocs.org/aircraft/N447WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33720
- Aircraft time: 70,511 hours, 42,001 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/SWAA2025090804491

## Discrepancy

CORROSION ANGLE FLOOR STRUCTURE ON BS 695 AT LEVEL STR 18L AND LBL 64 AT PASSENGER CABIN.   REPLACED ANGLE AND FASTENERS LOCATED ON FLOOR STRUCTURE ON BS 695 AT LEVEL STR 18L AND LBL 64 AT PASSENGER CABIN IAW  SRM 51-40-02-0G-0 AND DWG# 144A7730; SHEET 9; REV -.

---
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.