# SDR IPXA11M70791

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2011
- Submitted: January 3, 2012
- Operation: Air carrier
- Aircraft: [N253UP](https://openairdocs.org/aircraft/N253UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48439
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Part number: 20D103
- Condition: Contaminated
- Location: Nr 3 Pack
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA11M70791

## Discrepancy

SMOKE IN CARGO BAY - MAIN CARGO DECK; NO SMOKE OR FIRE INDICATIONS; RAN SMOKE REMOVAL CHECKLIST DURING RETURN; OCCURRED ON CLIMBOUT ABOUT 15000' MSL. ISOLATED APU AND NR 3 ENGINE BLEEDS AND DETERMINED THE NR 3 ENGINE BLEED SYS  INOPERATIVE.  R & R ALL COALESCER BAGS AND PERFORMED DUCT BURN.  REACTIVATED NR 3 PACK IN REF TO MEL DMP 21-51-1-0-1. PERFORMED OPS CHECK OF NR 3 PACK IN REF TO MM 21-53-20-5.  PACK OPS CHECKED NORMAL.

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