# SDR 9506529907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N957N
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47253
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Valve
- Condition: Malfunctioned
- Location: Airfoil De-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/9506529907

## Discrepancy

AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED WHEN ANTI-ICE WAS ACTIVATED.  FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT.  REPLACED THE PRESSURE REGULATOR VALVE AND SHUTOFF VALVE.  OPERATIONAL CHECK OK.  AIRCRAFT RETURNED TO SERVICE.

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