# SDR UALA2011042702053

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2011
- Submitted: May 27, 2011
- Operation: Air carrier
- Aircraft: N555UA
- Make and model: Boeing 757222
- Aircraft serial: 26647
- Aircraft time: 66,733 hours, 20,302 cycles
- Engine: Pwa PW2037
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Filter
- Condition: Out Of Tolerance
- Location: Recirc Fan
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011042702053

## Discrepancy

COCKPIT AIR NOISE IS EXCESSIVE.  REPLACED RECIR FAN FILTERS PER MM AND EQUIPMENT COOLING FILTER PER MM.

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