# SDR CALA2025091909050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2025
- Submitted: September 19, 2025
- Operation: Air carrier
- Aircraft: [N57862](https://openairdocs.org/aircraft/N57862), registered now
- Make and model: Boeing 757-33N
- Registry model: [Boeing 757-33N](https://openairdocs.org/model/boeing-757-33n) (OpenAirDocs)
- Aircraft serial: 32586
- Aircraft time: 65,020 hours, 19,374 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Condition: Odor
- Location: Zone 100
- Stage of operation: NR
- 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/CALA2025091909050

## Discrepancy

ACFT SMELLS OF VAPOR & BURNING OIL WITH APU & ENG BLEED.   REPLACED RECIRCULATION FILTERS IAW 21-25-02/401.  RAN APU AND BOTH ENGINES ONE AT A TIME.  THE ODOR WAS ONLY NOTICEABLE WHEN USING THE APU BLEED.  ENINE RUNS WERE NORMAL.  SUGGEST PLACING APU BLEED ON MEL.

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