# SDR DHL2001802003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2001
- Submitted: March 23, 2001
- Operation: Air carrier
- Aircraft: [N802DH](https://openairdocs.org/aircraft/N802DH), registered now
- Make and model: Doug DC-8-73F
- Registry model: [Doug DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f) (OpenAirDocs)
- Aircraft serial: 46076
- System (JASC): [3000 · Ice/Rain Protection System](https://openairdocs.org/jasc/3000)
- Part: Switch
- Condition: Faulty
- Location: Anti-Ice Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2001802003

## Discrepancy

UNABLE TO MAINTAIN CABIN PRESS WITH FLOWS AT MAX MANUAL CONTROL FULL CLOSED.  FOUND FAULTY SCOOP ANTI-ICE SWITCH CAUSING LT SCOOP VALVE TO INTERMITTINGLY STICK IN THE OPEN POSITION.  REPLACED SWITCH PER MM 20-50-1.  ALSO REPLACED LT SCOOP VALVE AS PRECAUTION PER MM 30-20-2.  OPS CK GOOD.  OK FOR SERVICE.

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