# SDR UALA2013032001748

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2013
- Submitted: April 12, 2013
- Operation: Air carrier
- Aircraft: N554UA
- Make and model: Boeing 757222
- Aircraft serial: 26644
- Aircraft time: 73,485 hours, 21,756 cycles
- Engine: Pwa PW2037
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Dirty
- Location: Cockpit
- 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/UALA2013032001748

## Discrepancy

RIGHT RECIRCULATION FAN EXTREMELY LOUD.  CLEANED DUCTS AT FLIGHT DECK. WINDSHIELD DECIBEL READING DIFFERENCE LESS THEN 3 DB AND READING AT 68.9 DB, OK FOR FLIGHT.

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