# SDR 9721376641

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N641NW
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21941
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pneumatic Syst
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: CL
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9721376641

## Discrepancy

DURING CLIMB, THE NR 2 ENGINE FIRE WARNING LIGHT ILLUMINATED.  REDUCED POWER TO IDLE ON NR 2 ENGINE AND RETURNED TO NRT.  AIRCRAFT LANDED WITHOUT INCIDENT.  REPLACED THE NR 2 ENGINE PRESSURE RELIEF VALVE, HIGH STAGE VALVE, AND HIGH STAGE CONTROL.  EXACT PART CAUSING EVENT TO BE DETERMINED.

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