# SDR 2000ZZZX409

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 6, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N3272F](https://openairdocs.org/aircraft/N3272F), registered now
- Make and model: Mooney M20F
- Registry model: [Mooney M20F](https://openairdocs.org/model/mooney-m20f) (OpenAirDocs)
- Aircraft serial: 670365
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Nut
- Part number: AN364720C
- Condition: Loose
- Location: Mfg Actuator
- Component: Dukes, 4196001C
- Stage of operation: LD
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000ZZZX409

## Discrepancy

LANDING GEAR COLLAPSED ON LANDING.  AFTER AIRCRAFT WAS TOWED TO HANGAR AND PLACED ON JACKS, FOUND THE GEAR ACTUATOR JACKSCREW HAD BECOME SEPARATED FROM THE MOTOR/GEAR PORTION OF THE GEAR ACTUATOR.  AFTER REMOVAL OF THE ACTUATOR FROM AIRCRAFT AND DISASSEMBLY, DISCOVERED THE DRIVE GEAR/JACKSCREW RETAINING NUT, P/N AN364-720C, HAD BACKED OFF THE THREADED SHAFT OF THE JACKSCREW ALLOWING THE JACKSCREW TO SEPARATE FROM THE DRIVE MECHANISM.

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