# SDR AALA202606226655

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 19, 2026
- Submitted: June 22, 2026
- Operation: Air carrier
- Aircraft: [N150NN](https://openairdocs.org/aircraft/N150NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6828
- Aircraft time: 32,683 hours, 12,958 cycles
- System (JASC): [3297 · Landing Gear System Wiring](https://openairdocs.org/jasc/3297)
- Part: Circuit Board
- Part number: 350F51000
- Condition: Defective
- Location: Zone 200
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202606226655

## Discrepancy

AIRCRAFT WAS GROUNDED: WHEN SELECTING THE LANDING GEAR DOWN LEVER IN FLIGHT, THE LANDING GEAR RED UNLOCK LIGHT DID NOT ILLUMINATE ON THE NUMBER 2 MAIN LANDING GEAR. THE FLIGHT CREW REPORTED THAT ON THE GROUND THE LIGHTS TESTED OK. MAINTENANCE PERFORMED BITE CHECK USING MCDU TO ENSURE "GEAR NOT DOWN FOR LANDING" AMM 32-61-00-710-001-A AND FOUND RIGHT LANDING GEAR UNLOCK RED INDICATOR (8GB) FLASHING DURING TEST, REPLACED RIGHT LANDING GEAR INDICATOR 8GB (AALA202606229990) AS WELL AS BOARD-ANN LIGHTT 9LP (AALA202606226655) PER ASM 32-61-01 MAINTENANCE ACCOMPLISHED THE SAME TEST AGAIN AND THE RIGHT LANDING GEAR UNLOCK LIGHT STAYED ON AND NO FAILURES WERE NOTED.

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