# SDR MRKA9520

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N691MA](https://openairdocs.org/aircraft/N691MA), registered now
- Make and model: Boeing 737-4S3
- Registry model: [Boeing 737-4S3](https://openairdocs.org/model/boeing-737-4s3) (OpenAirDocs)
- Aircraft serial: 24166
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Uplock Switch
- Part number: 189915
- Condition: Failed
- Location: Lt Mlg
- Stage of operation: CR
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MRKA9520

## Discrepancy

LEFT MAIN LANDING GEAR RED LIGHT INTERMITTENT ON IN FLIGHT.  REMOVED AND REPLACED LEFT MAIL LANDING GEAR UPLOCK SENSOR PER MAINTENANCE MANUAL 32-32-31 AND PERFORMED EXTENSION AND RETRACTION PER MM 32-32-00.  (W)

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