# SDR DXTA2015012005963

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 19, 2015
- Submitted: January 23, 2015
- Operation: Air carrier
- Aircraft: [N939QS](https://openairdocs.org/aircraft/N939QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500193
- Aircraft time: 11,696 hours, 7,049 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Part number: 7464513
- Condition: Odor
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2015012005963

## Discrepancy

IMMEDIATELY AFTER TAKEOFF, THE COCKPIT BEGAN TO FILL WITH SMOKE.  AFTER TURNING COCKPIT PACK OFF, SMOKE SEEMED TO DISSIPATE.   COMPLIED WITH A LIMITED BORESCOPE INSPECTION OF THE APU IMPELLER. NO DEFECTS NOTED. COMPLIED WITH APU OPERATIONAL CHECK IAW MM 49-10-00. OPS CHECKS GOOD. ACCOMPLISHED NJA FORM TC-750-21-120801M R1 ENVIRONMENTAL CONTROL SYSTEM (ECS) DUCT BURNOUT AND REMOVED AND REPLACED THE COALESCHER BAGS, OPS CHECKED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.