# SDR IPXA2026041795275

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2026
- Submitted: April 22, 2026
- Operation: Air carrier
- Aircraft: [N421UP](https://openairdocs.org/aircraft/N421UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25281
- Aircraft time: 35,922 hours, 23,455 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Seat Track
- Part number: 146N5217
- 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/IPXA2026041795275

## Discrepancy

FAULT-STR-Z200-MDC FLOOR STRUCTURE BETWEEN STA 1180 TO 1200 SEAT TRACKS BL 0 AND LBL 24 HOLE OF THE NUTPLATES WITH CORROSION DOT 07-012.  REMOVED DAMAGE ON THE SEAT TRACK STRUCTURE PER SRM 51-10-02-0G AND PERFORMED EVALUATION ON THE SEAT TRACK AT BL0 TO LBL24 BTWNSTA 1180 AND 1200. FLANGE WAS FOUND TO BE WHITIN ALLOWABLE LIMITS. PER SRM 53-00-52-1A-1. INSTALLED NUTPLATES 2(EA) AT MDC FLOOR STRUCTURE BETWEEN STA 1180 TO 1200 SEAT TRACKS BL 0 AND LBL 24. PER SRM 51-40-02-0G.  REVIEWED.

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