# SDR UALA2009122904051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2009
- Submitted: December 30, 2009
- Operation: Air carrier
- Aircraft: [N171UA](https://openairdocs.org/aircraft/N171UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 24322
- Aircraft time: 76,508 hours, 9,128 cycles
- Engine: Pwa PW4056
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Misrepaired
- Location: Bs 760-780 S24r
- Stage of operation: IN
- How discovered: 9
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009122904051

## Discrepancy

AN EXTERNAL DOUBLER IS INSTALLED WITH BLIND FASTENERS AT BS 760-780 STR 24R-25R.  MAJOR REPAIR ACCOMPLISHED: REPLACED BLIND FASTENERS WITH SOLID FASTENERS.

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