# SDR DXTA2021091448810

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2021
- Submitted: September 14, 2021
- Operation: Air carrier
- Aircraft: [N697QS](https://openairdocs.org/aircraft/N697QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0229
- Aircraft time: 1,773 hours, 1,160 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2021091448810

## Discrepancy

CABIN SMOKE: WHILE ON GROUND WITH APU ON, A FINE MIST WITH AN  ODOR OF ENGINE OIL BEGAN TO APPEAR & THICKENED UNTIL BLEED AIR TURNED OFF.  
COMPLIED WITH TC-68A-21-181006M ENVIRON CONTROL SYS BLEED DUCT BURN PROCEDURE & NOTED SMOKE WHILE DOING PROCEDURE.  FOUND APU OIL LEVEL LOW NO OIL ON APU OIL DIP STICK. NOTICED OIL ON APU INLET DRAIN LINES. MCC REQUEST TO BOROSCOPE APU & LOOK FOR INTERNAL OIL LEAKS.PERFORMED BORESCOPE OF APU. COMPLIED WITH ENVIRON CONTROL SYSTEM BLEED DUCT BURN PROCEDURE WITH ENGINES RUNNING ONLY & NO SMOKE NOTED IN COCKPIT & CABIN.  REMOVED & REPLACED HEPA FILTER WITH A CUSTOMER SUPPLIED NEW PART PER NJA TASK TC-68A-21-181006M & AMM 21-70-10.

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