# SDR UIEA2025072601030

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2025
- Submitted: August 8, 2025
- Operation: Air carrier
- Aircraft: [N446MC](https://openairdocs.org/aircraft/N446MC), registered now
- Make and model: Boeing 747-4B5F
- Registry model: [Boeing 747-4B5F](https://openairdocs.org/model/boeing-747-4b5f) (OpenAirDocs)
- Aircraft serial: 33517
- Aircraft time: 88,448 hours, 15,129 cycles
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Seat Track
- 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/UIEA2025072601030

## Discrepancy

MAIN DECK,  BS 1900-1920,  RBL 33, SEAT TRACK FOUND CORRODED.  SEAT TRACK CORROSION REMOVED IAW SRM 51-10-02 & REPROTECTED IAW SRM 51-20-01 AND BLEND OUT AREA MEASURED L:8" X W: 0.7" X D: 0.007", WITHIN SRM 53-00-52-1A-1. ALLOWABLE DAMAGE 1,  FIG 101 LIMITS. NO FURTHER DEFECTS NOTED.

---
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.