# SDR 97FDEA00479

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N601FE](https://openairdocs.org/aircraft/N601FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48401
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 14711525
- Condition: Failure
- Location: Nr1 Engine
- Stage of operation: CL
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97FDEA00479

## Discrepancy

NRT: AFTER T/O SMOKE OF UNKNOWN ORIGIN APPEARED IN COCKPIT; DID AIR TURNBACK AND RETURNED TO NRT.  SMOKE APPEARED TO BE COMING FROM AIR CONDITIONING.  FOUND DIRTY OIL IN COALESER OF WATER SEPARATOR IN THE NR 1 PACK AND WET OIL IN NR 1 ENG STATER PNEU DUCT IN THE NR 1 ENG.  ALSO, FOUND HOLE BY CHAFING BY HYD LINE (MAINTENANCE REV HALF OPEN MECH) ON THE NR 1 ENG BLEED DUCT.  THEN CLEANUP INSIDE OF NR 1 PACK WATER SEPARATOR AND R/R COALESER ALSO BLEED DUCT.

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