A PA24-250 landed gear up when the pilot was unable to extend the landing gear.

Attributes
ACN	947035
Time
Date	201104
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	PA-24 Comanche
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Pilot Flying Single Pilot
Experience	Flight Crew Last 90 Days 32 Flight Crew Total 204 Flight Crew Type 6.9
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Gear Up Landing

Narrative:

I landed gear up when the landing gear switch malfunctioned. Performed emergency manual gear down; multiple tries to put gear down manually; over an hour; jack screw bar from gear motor fell below point and jammed; preventing from the gear from coming down.

Original NASA ASRS Text

Title: A PA24-250 landed gear up when the pilot was unable to extend the landing gear.

Narrative: I landed gear up when the landing gear switch malfunctioned. Performed emergency manual gear down; multiple tries to put gear down manually; over an hour; jack screw bar from gear motor fell below point and jammed; preventing from the gear from coming down.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.