PA-24 comanche pilot reported a landing gear collapse upon landing for unknown reasons.

Attributes
ACN	1487285
Time
Date	201709
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	PA-24 Comanche
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Landing Gear
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument
Experience	Flight Crew Last 90 Days 5 Flight Crew Total 650 Flight Crew Type 60
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Ground Strike - Aircraft

Narrative:

I was cleared for landing and was on final approach. I previously lowered the landing gear approximately three miles out. I know this because I remember engaging the landing gear switch and adjusting the trim and power for the altered handling as a result of the landing gear lowering. Also; after the incident; a tower personnel confirmed that the tower had confirmed that my landing gear was down before I landed.as I landed; the gear gave way and collapsed causing the aircraft to skid down the runway on its belly. This caused me to block the only runway and resulted in the closing of the airport for approximately 2 hours until my plane could be removed off the runway.my comanche had recently passed its annual and I had passed my flight review within the last month. I was not fatigued or in any way impaired. I had made a short flight to get gas and was returning to where I hangar my plane.

Original NASA ASRS Text

Title: PA-24 Comanche pilot reported a landing gear collapse upon landing for unknown reasons.

Narrative: I was cleared for landing and was on final approach. I previously lowered the landing gear approximately three miles out. I know this because I remember engaging the landing gear switch and adjusting the trim and power for the altered handling as a result of the landing gear lowering. Also; after the incident; a tower personnel confirmed that the tower had confirmed that my landing gear was down before I landed.As I landed; the gear gave way and collapsed causing the aircraft to skid down the runway on its belly. This caused me to block the only runway and resulted in the closing of the airport for approximately 2 hours until my plane could be removed off the runway.My Comanche had recently passed its annual and I had passed my flight review within the last month. I was not fatigued or in any way impaired. I had made a short flight to get gas and was returning to where I hangar my plane.

Data retrieved from NASA's ASRS site 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.