# SDR CALA2013112793293

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2013
- Submitted: November 27, 2013
- Operation: Air carrier
- Aircraft: [N120UA](https://openairdocs.org/aircraft/N120UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29166
- Aircraft time: 59,645 hours, 6,899 cycles
- Engine: Pwa PW4056
- System (JASC): [5347 · Fuselage, Seat/Cargo Attach Fittings](https://openairdocs.org/jasc/5347)
- Part: Seat Track
- Part number: 140U561720
- Condition: Corroded
- Location: Fuselage
- 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/CALA2013112793293

## Discrepancy

MAIN DECK SEAT TRACK AT ZONE D STATION 1658 TO 1660 RBL 40 SEAT TRACK FOUND CORRODED. CORROSION REPLACES AT BS 1580 TO 1770 RBL 40.  CORROSION REMOVED IAW SRM 51-10-02, RECORD BLEND OUT CORROSION DEPTH 0.035", WIDTH  0.9", LENGTH 2".  CORROSION BLEND OUT NOT WITHIN SRM 53-00-52 ALLOWABLE DAMAGE FIG 101 LIMIT.  FOR REPAIR REFER TO SRM FIG 51-10-02 & REPLACEMENT PN 140U5617-20.

---
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.