# SDR DXTA2015005006014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2015
- Submitted: May 4, 2015
- Operation: Air carrier
- Aircraft: [N341QS](https://openairdocs.org/aircraft/N341QS), registered now
- Make and model: Cessna 680CE
- Aircraft serial: 6800225
- Aircraft time: 6,249 hours, 4,054 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Dirty
- Stage of operation: TX
- 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/DXTA2015005006014

## Discrepancy

WHEN APU STARTED & BLEED AIR VALVES OPENED, SMOKE BEGAN TO POUR OUT OF VENTS.  SMOKE DISSIPATED WHEN APU BLEEDS CLOSED.  WHEN ENG STARTED, NO SMOKE WAS OBSERVED.  R & R COALESCER SOCK & COMPLIED WITH ENVIRONMENTAL CONTROL SYS, ECS, DUCT BURN OUT FORM IAW TC-680-21-120905M.  OPERATIONAL CHECKED GOOD.  NO LEAKS NOTED.

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