# SDR TRBA2011112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2011
- Submitted: July 15, 2011
- Operation: Air carrier
- Aircraft: N420AT
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 420
- Aircraft time: 30,526 hours, 32,913 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Landing Gear
- Condition: Malfunctioned
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2011112

## Discrepancy

THE CREW REPORTED THAT DURING THE CLIMB, THE MLG WOULD NOT RETRACT, WITH AN UNLOCK INDICATION ON BOTH PANELS AND A NOTICIABLE VIBRATION.  THE CREW ELECTED TO RETURN TO DEPARTURE.  THE ACFT LANDED WITHOUT INCIDENT.   R & R WOW PROX SWITCH 53GB IAW JIC 32-61-00, REPOSITONED DIODE MODULE 910VR IAW SPM 20-44-33, AND ACCOMPLISHED LDG GEAR FUNCTIONAL TEST IAW JIC 32-31-00.  FOUND SATISFACTORY AT THIS TIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.