# SDR AALA201803169030

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2018
- Submitted: March 19, 2018
- Operation: Air carrier
- Aircraft: [N979UY](https://openairdocs.org/aircraft/N979UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5763
- Aircraft time: 15,461 hours, 6,233 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Relay
- Part number: E0219ASXUU
- Condition: Faulty
- Location: Mlg
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201803169030

## Discrepancy

AFTER TAKEOFF, THE LANDING GEAR WOULD NOT RAISE WITH THE HANDLE UP.   NO EMERGENCY DECLARED,  AIRCRAFT LANDED WITHOUT FURTHER INCIDENT.  MAINTENANCE TROUBLESHOT IAW TSM 32-31-00-810-808A,  NO 28 VDC AT SAFETY VALVE 49GA CONNECTOR.  REPLACED THE RELAY 62GA IAW ESPM 20-46-50.  THE LANDING GEAR CONTROL INTERFACE UNITS 1 AND 2 WERE CHECKED IAW AMM 32-69-00-740-001A,  28 VDC RESTORED AND PERFORMED SUCCESSFUL FUNCTIONAL CHECKS ON THE GEAR SWINGS IAW AMM 32-31-00-720-002A.  AIRCRAFT WAS GROUNDED.


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