# SDR UPS99431001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N691UP](https://openairdocs.org/aircraft/N691UP), registered now
- Make and model: Boeing 747121
- Aircraft serial: 19641
- System (JASC): [8010 · Engine Cranking](https://openairdocs.org/jasc/8010)
- Part: Connector
- Condition: Contaminated
- Location: Nr 4 Engine
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS99431001

## Discrepancy

APPROX 2 HRS INTO FLIGHT, NR 4 START VALVE LIGHT CAME ON THE WENT OUT CAME ON AGAIN, THEN SHUT DOWN NR 4 ENGINE PER AOM.  LIGHT WENT OUT.  MX FOUND CONNECTORS AT START VALVE OIL SOAKED AND SHORTED.  CLEANED CONNECTORS.  SYSTEM OPS CHECK NORMAL.  THIS CLEARS M180958.

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