# SDR AALA202111105340

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 27, 2021
- Submitted: November 10, 2021
- Operation: Air carrier
- Aircraft: [N753US](https://openairdocs.org/aircraft/N753US), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1326
- Aircraft time: 49,226 hours, 34,486 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Apu
- Part number: 38007081
- Part serial: P4946
- Condition: Leaking
- Location: Zone 100
- Part time: 28,697 hours, 11,938 cycles
- 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/AALA202111105340

## Discrepancy

AIRCRAFT WAS GROUNDED: SMELLED AN ODOR ON GROUND IN MKE. DID NOT THINK IT WAS A TOXIC FUME. SMELL PERSISTED THROUGH OUT FLIGHT. ON ARRIVAL SMELL BECAME EXTREMELY PUNGENT. CREW MEMBERS WITH METALLIC TASTE IN MOUTH AND BURNING THROATS/EYES. SOURCE OF ODOR DETERMINED TO BE THE APU.  REPLACED APU AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER TASK CARD 26L00021004. (CLOSED)

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