# SDR USAA2011111000016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2011
- Submitted: November 10, 2011
- Operation: Air carrier
- Aircraft: [N180US](https://openairdocs.org/aircraft/N180US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1525
- Aircraft time: 37,159 hours, 13,390 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Cooling Fan
- Part number: 36161407
- Part serial: P3497
- Condition: Leaking
- Location: Apu
- Part time: 12,307 hours, 4,385 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2011111000016

## Discrepancy

FLIGHT ATTENDANTS REPORTED A STRONG BURNING ODOR NEAR 3L DOOR.  MAINTENANCE FOUND APU OIL COOLING FAN LEAKING.  REPLACED FAN.  ALSO FOUND APU OVER-SERVICED BY 1.25 QTS OIL, CORRECTED TO PROPER LEVEL.  CLEANED APU LOAD COMPRESSOR AND REPLACED HEPA FILTERS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.