# SDR UALA2012121207175

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2012
- Submitted: January 18, 2013
- Operation: Air carrier
- Aircraft: [N677UA](https://openairdocs.org/aircraft/N677UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30029
- Aircraft time: 40,947 hours, 10,107 cycles
- Engine: Pwa PW4056
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 65B480372
- Part serial: 13410877
- Condition: Faulty
- Location: Nr 1
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012121207175

## Discrepancy

VERY LOUD HOWL FROM AFT EXHAUST FAN OUTFLOW DOOR.  ALSO LOUD IN AFT GALLEY.  AFT EQ EXHAUST FAN 1 MSG DISPLAYED.  REMOVED AND REPLACED NR 1 AFT EQUIPMENT - LAVATORY FAN IAW AMM, NO DEFECTS NOTED.

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