# SDR AALA201801089017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2018
- Submitted: January 12, 2018
- Operation: Air carrier
- Aircraft: [N535UW](https://openairdocs.org/aircraft/N535UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3993
- Aircraft time: 31,259 hours, 10,943 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 38007081
- Part serial: P3515
- Condition: Odor
- Location: Apu Bay
- Part time: 30,722 hours, 15,649 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/AALA201801089017

## Discrepancy

DURING CLIMB OUT,  PASSING 5000 FT, FLIGHT ATTENDANTS REPORTED VERY STRONG ODOR FROM BACK OF CABIN.   NO APU USED ON GROUND.  FUMES WENT AWAY AFTER THE NR 2 PACK WAS TURNED OFF. THE NR 2 PACK REMAINED OFF FOR THE DURATION OF FLIGHT.  AIRCRAFT WAS GROUNDED.    TROUBLESHOT THE CABIN ODOR, AND REPLACED THE APU TO RECTIFIY PROBLEM.  PERFORMED A SATISFACTORY OPS CHECK., NO ODOR NOTED.

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