# SDR UPS96421341

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N671UP](https://openairdocs.org/aircraft/N671UP), registered now
- Make and model: Boeing 747123
- Aircraft serial: 20323
- Engine: Pwa JT9D7A
- System (JASC): [8012 · Engine Start Valves/Controls](https://openairdocs.org/jasc/8012)
- Part: Pressure Switch
- Part number: 214N411B
- Condition: Defective
- Location: Nr 4 Engine
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS96421341

## Discrepancy

INSPECTION TYPE-N/A, PERFORMED PRECAUTIONARY SHUTDOWN OF NR 4 ENGINE DUE TO START VALVE LIGHT ILLUMINATION.  REPLACED NR 4 START VALVE PRESSURE SWITCH.

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