# SDR GTIA2025092539087

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2025
- Submitted: September 25, 2025
- Operation: Air carrier
- Aircraft: [N705NK](https://openairdocs.org/aircraft/N705NK), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11608
- Aircraft time: 6,666 hours, 2,811 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Overserviced
- Location: Zone 100
- Stage of operation: DE
- 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/GTIA2025092539087

## Discrepancy

FUME EVENT DETECTED IN CABIN ON DESCENT-FOLLOWED TSM 05-50-00-810-831-1. FOUND APU OVERSERVICED TYPE 3 & DRAIN OIL AS PER AMM 49-90-00 TO PROPER LEVEL, ALSO REF. LOG ITEMS 3510219-1 & 2 FOR RECIRC FILTERS, R/R AND ENG IDLE RUN. NO DEFECTS AT THIS TIME.

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