# SDR UIEA2012110500512

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2012
- Submitted: November 5, 2012
- Operation: Air carrier
- Aircraft: [N850GT](https://openairdocs.org/aircraft/N850GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37562
- Aircraft time: 2,087 hours, 353 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Switch
- Condition: Failed
- Location: Mlg
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2012110500512

## Discrepancy

RT WING GEAR HAD AN UP INDICATION AFTER LOWERING GEAR FOR LANDING.  QRH COMPLETED WITH ALL GEAR DOWN.  CMC REPORTED FAILURE OF PRI AND ALT PROXIMITY SWITCHES FOR RT WING GEAR UP, DOWN AND DOORS.  CYCLED GEAR SWITCHES BACK TO NORMAL, RUN CMC TEST IAW AMM 32-09-03 ALL INDICATIONS NORMAL.  CMC REPORTS NO EXISTING FAULTS.

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