# SDR 0100721148

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2001
- Submitted: March 2, 2001
- Operation: Air carrier
- Aircraft: [N148US](https://openairdocs.org/aircraft/N148US), registered now
- Make and model: Doug DC-10-40
- Registry model: [Doug DC-10-40](https://openairdocs.org/model/douglas-dc-10-40) (OpenAirDocs)
- Aircraft serial: 46757
- Aircraft time: 80,364 hours, 28,712 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Dirty
- Location: Ac Bay
- 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/0100721148

## Discrepancy

AFTER TAKEOFF, AIR CONDITIONING PACKS PRODUCED A BLUE CLOUD OF BILLOWING SMOKE.  FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT.  FOUND NR 2 AND NR 3 COALESCER BAGS DIRTY.  REPLACED COALESCER BAGS AND PERFORMED PACK BURNOUT PROCEDURE.  REPLACED AIR CYCLE MACHINE.  OPERATIONAL CHECK NORMAL.

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