# SDR UALA2013062804529

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2013
- Submitted: July 25, 2013
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 58,897 hours, 6,853 cycles
- Engine: Pwa PW4056
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Corroded
- Location: Bs 1353 S15l-18r
- 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/UALA2013062804529

## Discrepancy

FUSELAGE SKIN INTERNAL SURFACE CORRODED AT BS 1353, S15-18L & S13 -18R.   CUT OUT CORRODED SKIN.  MFG & INSTALLED NEW SKIN SEGMENT, FILLERS, DOUBLERS, & TRIPLERS IAW ECRA 5330-04585.  MAJOR REPAIR.

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