# SDR DALA2026011200296

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2026
- Submitted: January 12, 2026
- Operation: Air carrier
- Aircraft: [N584NW](https://openairdocs.org/aircraft/N584NW), registered now
- Make and model: Boeing 757351
- Aircraft serial: 32984
- Aircraft time: 78,976 hours, 26,027 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Part time: 96,233 hours, 33,426 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026011200296

## Discrepancy

SMKE/FUME- ON TAXI OUT CREW REPORTED FLIGHT DECK FILLED WITH NOTICEABLE HAZE AND SMOKE.  FOUND APU OIL LEAK AT GEN SEAL AND OIL QTY XMTR. REPLACED GEN AND XMTR SEAL. INSPECTED APU BLEED DUCT AND PACK HEAT EXCHANGERS FOR CONTAMINATION, NONE FOUND. CHECKED CABIN LIGHT BALLASTS, COFFEE MAKERS, AND IFE SYSTEM WITH NO FINDINGS. REPLACED CABIN RECIRC FILTERS. PERFORMED HIGH POWER ENGINE RUNS AND DUCT BURNOUT WITH NO SMOKE.

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