# SDR UALA2009121803921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2009
- Submitted: December 18, 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): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 900 Lbl 20-40
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009121803921

## Discrepancy

MAIN DECK FLOORBEAM UPPER CHORD HAS CORROSION, BS 900, LBL 20 - LBL 40.  MAJOR REPAIR ACCOMPLISHED: INSTALLED REPAIR.

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