# SDR AALA2019010219004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2019
- Submitted: February 4, 2020
- Operation: Air carrier
- Aircraft: [N559UW](https://openairdocs.org/aircraft/N559UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5292
- Aircraft time: 24,723 hours, 9,849 cycles
- Engine time: 14,576 hours, 5,851 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Seal
- Condition: Leaking
- Location: Apu
- Component: Apu, Hnywl
- Component part number: 38007081WGEN
- Stage of operation: DE
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019010219004

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS DIRTY SOCK- FUME SMELL NOTED IN DECENT INTO DFW-13000FT 4.4 D.PSI- ALT 2350 NOTICED MOST INFRONT + DOOR 3 AREA. MAINTENANCE DETERMINED THAT APU IS LEAKING AT THE INLET ALONG THE SEAL. APU CHANGE HAS BEEN DECLARED. ***SUPPLEMENTAL ACTION SECT.4, 5 AND 6: APU INLET SEAL LEAKING, REMOVED AND REPLACED APU.***(CLOSED)

---
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.