# SDR TWAA9906701

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N9619V](https://openairdocs.org/aircraft/N9619V), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53566
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Dirty
- Location: Cabin
- Stage of operation: TO
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA9906701

## Discrepancy

ON TAKEOFF CABIN FILLED WITH SMOKE.  FLIGHT RETURNED TO DTW.  FOUND SMOKE COMING FROM APU AIR SYSTEM.  PLACARD THE APU AIR INOPERATIVE PER MEL.  CHECK-C 10-31-98 STL.  *S/D*  NO APU OIL LEAKS WERE FOUND.  REPLACED THE WATER SEPARATOR BAGS AND ACCOMPLISHED DUCT BURN OUT PROCEDURES.

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