# SDR UPS06M47311

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2006
- Submitted: July 12, 2006
- Operation: Air carrier
- Aircraft: [N275UP](https://openairdocs.org/aircraft/N275UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48774
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Clogged
- Location: A/C Bay
- Stage of operation: UK
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS06M47311

## Discrepancy

FLIGHT DIVERTED TO HKG DUE TO SMOKE IN COCKPIT.  FLIGHT DUMPED FUEL TO ALLOWABLE MAX LANDING WEIGHT.  FOUND COALESCER BAG TO BE CLOGGED.  REMOVED AND REPLACED NR 1 ACM COALESCER BAG IAW 21-54-05-2.  OPERATED NR 1 ACM AND NOW NORMAL.  PERFORMED ENG GROUND RUN ENG'S 1 ,2, 3 AND OPERATED BLEED SYSTEMS INDEPENDENTLY AND OPS TEST NORMAL.  AC OK FOR SERVICE.

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