# SDR AALA202608274465

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2026
- Submitted: August 27, 2026
- Operation: Air carrier
- Aircraft: [N579UW](https://openairdocs.org/aircraft/N579UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6100
- Aircraft time: 39,401 hours, 16,222 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil Tank
- Condition: Overserviced
- Location: Apu
- Component: Apu, Hnywl, 1319A
- Component part number: 38007081
- Stage of operation: CL
- How discovered: O
- Nature of condition: W, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608274465

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORTED A STRONGER THAN NORMAL CLEANING OR CHEMICAL SMELL EMANATING FROM THE MIDDLE SECTION OF THE CABIN DURING TAXI THAT SEEMED TO DISSIPATE BUT AFTER AN HOUR AT CRUISE THE ODOR RETURNED WITH A STRONGER THAN NORMAL ODOR - MAINTENANCE FOUND THE APU OIL WAS OVERSERVICED RESULTING IN THE APU INTAKE PLUNUM TO BECOME VERY SATURATED WITH OIL REQUIRING THE INTAKE PLENUM TO BE REPLACE - MAINTENANCE CORRECTLY SERVICED THE APU OIL TANK ALONG WITH CHECKING AND CLEANING THE APU PER JOB CARD 26L31049011

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