# SDR USAASB02152

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2002
- Operation: Air carrier
- Aircraft: [N407US](https://openairdocs.org/aircraft/N407US), registered now
- Make and model: Boeing 737401
- Aircraft serial: 23877
- Engine: Ge CFM56*
- System (JASC): [3233 · Landing Gear Actuator](https://openairdocs.org/jasc/3233)
- Part: Actuator
- Part number: ACTBEAMLINK400
- Condition: Failed
- Location: Lt Mlg
- Part time: 36,467 hours
- Stage of operation: CL
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAASB02152

## Discrepancy

ON CLIMB OUT, ENROUTE, CREW REPORTED THE LEFT MAIN LANDING GEAR WOULD NOT RETRACT AFTER PLACING GEAR LEVER TO THE UP POSITION.  THE LEFT MAIN LANDING GEAR UNSAFE LIGHT WAS ALSO ILLUMINATED.  CREW RECEIVED NORMAL GEAR INDICATION OF THREE GREEN LIGHTS WHEN GEAR WAS EXTENDED.  FLIGHT RETURNED AND LANDED WITHOUT FURTHER INCIDENT.  NO EMERGENCY WAS DECLARED.  MAINTENANCE REMOVED AND REPLACED THE LEFT MAIN LANDING GEAR RETRACT ACTUATOR PER MM.  ALSO, REMOVED AND REPLACED LEFT MAIN LANDING GEAR UPLOCK SENSOR (PN 189929).  OPERATIONAL CHECK AND LEAK CHECK GOOD.

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