# SDR AALA202604100675

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2026
- Submitted: April 10, 2026
- Operation: Air carrier
- Aircraft: [N995AN](https://openairdocs.org/aircraft/N995AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7301
- Aircraft time: 28,578 hours, 11,407 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Control Valve
- Part number: 32912382
- Condition: Leaking
- Location: Zone 100
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604100675

## Discrepancy

AIRCRAFT WAS GROUNDED: ON DECENT WITH IDLE POWER AND APU OFF, SMELL IN CABIN AND FLIGHT DECK OF WET SOCKS. APPROPRIATELY 15000FT ALTITUDE WITH VMC CONDITIONS/NO MOISTURE. SWITCHING AIR SOURCE FROM ENGINE TO APU HELPED.TURNING OFF PACK 1 HELPED A LOT. SMELL WENT AWAY ONCE AIRPLANE APPLIED POWER.  MAINTENANCE FOUND THE APU SURGE CONTROL VALVE LEAKING FUEL AND REPLACED IT. A SATISAFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.

---
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.