# SDR 9600859756

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N756NW
- Make and model: Doug DC-9-41
- Registry model: [Doug DC-9-41](https://openairdocs.org/model/douglas-dc-9-41) (OpenAirDocs)
- Aircraft serial: 47180
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Press Switch
- Condition: Malfunctioned
- Location: Anti-Ice
- Stage of operation: UK
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9600859756

## Discrepancy

EN ROUTE DTW-YHZ, AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT REMAINED ON DURING WING ANTI-ICE OPERATION.  FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT.  REPLACED THE TAIL ANTI-ICE VALVE, NO HELP.  REPLACED THE PRESSURE SWITCH AND OPERATIONAL CHECK NORMAL.  AIRCRAFT RETURNED TO SERVICE.

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