# SDR ASAA2025012255960

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2025
- Submitted: February 14, 2025
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 38,181 hours, 11,907 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 141A550425
- 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/ASAA2025012255960

## Discrepancy

FWD WET AREA STA 328 FLOOR BEAM HAS COFRROSION AT APPROX RBL 24. GROUNDED - YES. REMOVED CORROSION FROM FLOOR BEAM AT F5 328 AND RBL 24 DETERMIND TO BE OUT OF ALLOWABLE LIMITS IAW BOEING 797-900 SRM 53-16-51-1A-1, REPAIRED MADE TO FLOOR BEAM IAW BOEING 737-900 SRM 53-10-51-2R-7W: 1.5 O: .125 R:.067 L:2 D:.058.

---
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.