# SDR DHL98717004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N717DH](https://openairdocs.org/aircraft/N717DH), registered now
- Make and model: Boeing 727-23
- Registry model: [Boeing 727-23](https://openairdocs.org/model/boeing-727-23) (OpenAirDocs)
- Aircraft serial: 19389
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 1111588311
- Condition: Dirty
- Location: Nr 1 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/DHL98717004

## Discrepancy

SMOKE IN COCKPIT AFTER TAKEOFF.  FOUND NR 1 ENGINE PRECOOLER CHECK VALVE STUCK OPEN.  CLEANED VALVED AND RAN ENGINE, OPS CHECK GOOD.

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