# SDR IPXA2025031311380

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2025
- Submitted: March 26, 2025
- Operation: Air carrier
- Aircraft: [N473UP](https://openairdocs.org/aircraft/N473UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 28846
- Aircraft time: 25,469 hours, 16,974 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 149N76555
- 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/IPXA2025031311380

## Discrepancy

FS 1220 LBL 65 TO LBL 70 UPPER PART OF T-CHORD FLANGE IS EXFOLIATED.REMOVED T-CHORD ON FS 1220 LBL 65 TO LBL 70 IAW B757-200, SRM 51-40-02, EVALUATED AND FOUND OUT OF LIMITS IAW B757-200, SRM 53-00-71-1A-1 DETAIL IX.INSTALLED NEW T-CHORD AT STA1220 LBL65-70 AND APPLIED CIC TO NEW T-CHORD.

---
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.