# SDR AALA201609069018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2016
- Submitted: September 7, 2016
- Operation: Air carrier
- Aircraft: [N539UW](https://openairdocs.org/aircraft/N539UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4082
- Aircraft time: 22,870 hours, 8,916 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Part number: 38007081
- Part serial: P3975
- Condition: Contaminated
- Location: Apu Bay
- Part time: 25,150 hours, 10,098 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201609069018

## Discrepancy

ODOR IN COCKPIT CABIN WHEN RUNNING PACKS WITH APU.  ALSO SMELLED THE ODOR DESCENDING BELOW 10,000.  AIRCRAFT WAS GROUNDED.  MAINTENANCE FOUND EVIDENCE OF OIL IN THE APU PLENEUM.  MAINTENANCE REPLACED APU IAW JOB CARD 26L31049003 AND ACCOMPLISHED SATISFACTORY OPS CHECK.

---
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.