# SDR AALA202311240251

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2023
- Submitted: November 24, 2023
- Operation: Air carrier
- Aircraft: [N657AW](https://openairdocs.org/aircraft/N657AW), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1083
- Aircraft time: 78,492 hours, 31,692 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Ptu
- Part number: 410100211
- Part serial: 1752
- Condition: Leaking
- Location: Zone 100 - Fuse
- Part time: 60,112 hours, 26,818 cycles
- Stage of operation: CL
- 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/AALA202311240251

## Discrepancy

AIRCRAFT WAS GROUNDED: MUSTY SMELL REPORTED BY FLIGHT ATTENDANT IN BACK AFTER TAKEOFF. MAINTENANCE FOUND THE POWER TRANSFER UNIT (PTU) LEAKING HYDRAULIC FLUID INTO THE APU INLET AND REPLACED IT PER AMM 29-23-41. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.

---
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.