# SDR UALA2011071503607

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2011
- Submitted: July 28, 2011
- Operation: Air carrier
- Aircraft: [N673UA](https://openairdocs.org/aircraft/N673UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29241
- Aircraft time: 41,632 hours, 10,931 cycles
- Engine: Pwa PW4052
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Blade
- Condition: Damaged
- Location: Apu Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011071503607

## Discrepancy

VIBRATION IN YOKE ON GROUND.   WORST ON F-O SIDE.  FOUND NO VIBRATION WITH APU OFF.  VISUAL INSPECTION OF APU MOUNTS, STRUTS AND BRACKETS - NO OBVIOUS DEFECTS NOTED.  DUCTS AND APU EXHAUST SECURE.  RAN APU, NOTED NO LOOSE OR VIBRATING ITEMS.  FOUND FOREIGN IMPACT DAMAGE 1 STAGE BLADE.  APU REPLACED.

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