# SDR COEA2017051601921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2017
- Submitted: May 17, 2017
- Operation: Air carrier
- Aircraft: [N921FX](https://openairdocs.org/aircraft/N921FX), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 319
- Aircraft time: 26,863 hours, 30,869 cycles
- System (JASC): [3297 · Landing Gear System Wiring](https://openairdocs.org/jasc/3297)
- Part: Wire
- Condition: Damaged
- Location: Proximity Switch
- Component: Proximity Switc
- Component part number: D22924010
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COEA2017051601921

## Discrepancy

DURING VISUAL APPROACH, THE CREW RECEIVED A MASTER WARNING LANDING GEAR NOT DOWN ON CAP AND 1 RT UNLOCK LIGHT ON OVERHEAD PANEL.  INITIATED A GO AROUND,  CYCLED THE GEAR 3 TIMES AND RAN THE EMERGENCY LANDING GEAR EXTENSION CHECKLIST.  LANDED WITH OUT INCIDENT.  MAINTENANCE FOUND THE MLG PROXIMITY SWITCH RT (10GB) WIRING DAMAGED.  REPLACED THE SWITCH. CHECKED GOOD.

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