# SDR AALA201709149029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2017
- Submitted: September 14, 2017
- Operation: Air carrier
- Aircraft: [N166NN](https://openairdocs.org/aircraft/N166NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6973
- Aircraft time: 3,564 hours, 1,385 cycles
- System (JASC): [3231 · Landing Gear Door Retract Section](https://openairdocs.org/jasc/3231)
- Part: Proximity Sensor
- Part number: 893301
- Condition: Faulty
- Location: Mlg Door
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201709149029

## Discrepancy

LANDING GEAR WOULD NOT EXTEND NORMALLY. GRAVITY EXTENSION WAS REQUIRED. MAINTENANCE FOUND BAD RELAY (62GA) PER TSM 32-31-00-810-808-A. REPLACED HERMETICAL RELAY (62GA) AND ACCOMPLISHED AMM TASK 32-31-00-720-002-A AS REQUIRED. NO FAULTS NOTED. . REPLACED THE RIGHT MAIN LANDING GEAR DOOR SENSOR 26GM IAW AMM 32-31-73.  AIRCRAFT WAS GROUNDED.

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