# SDR 9716636729

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N629US
- Make and model: Boeing 747251F
- Aircraft serial: 22388
- Engine: Pwa JT9D7J
- System (JASC): [8012 · Engine Start Valves/Controls](https://openairdocs.org/jasc/8012)
- Part: Ind Switch
- Condition: Malfunctioned
- Location: Nr 1 Engine
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9716636729

## Discrepancy

AT FL250, THE NR 1 ENGINE START VALVE OPEN LIGHT ILLUMINATED.  CREW SHUT DOWN THE ENGINE AND RETURNED TO ANC WITHOUT INCIDENT.  MAINTENANCE REPLACED THE NR 1 ENGINE START VALVE INDICATING SWITCH.  EXACT PART CAUSING PROBLEM TO BE DETERMINED.

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