# SDR 99UAL900334

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N312UA
- Make and model: Boeing 737322
- Aircraft serial: 23673
- Engine: Ge CFM56*
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Contaminated
- Location: Cabin
- Stage of operation: CR
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99UAL900334

## Discrepancy

EXPERIENCED SMOKE IN CABIN.  *S/D*  POSSIBLE COALESCER BAG FAILURE.  REPLACED BOTH COALESCER BAGS AND CHANGED THE RECIRCULATION FAN AND EQUIPMENT COOLING FAN BLOWER AS PRECAUTIONARY.  EXTENSIVE INSPECTION OF E & E BAY, CABIN LIGHTING, SIDE AND OVERHEAD PANELS AND ENVIRONMENTAL CONTROL SYSTEM FOUND NO DISCREPANCIES.

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