The pilot of a mooney M20 experienced a landing gear collapse during landing for unknown reasons.

Attributes
ACN	1299043
Time
Date	201509
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	M-20 K (231) / Encore
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Landing Gear
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 2000 Flight Crew Type 850
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Ground Strike - Aircraft

Narrative:

Cleared to land 22R with a left base entry. The aircraft was configured for landing by base entry. Gear lever down; gear safe light illuminated and manual gear down indication; were observed. One more gear down and locked check on short final indicated gear down and locked. On round out the mains touched first followed by the nose gear. Approximately 1 second after the roll out had begun the left wing began to drop. The belly drug for about 200 feet before the propeller stuck the ground. The aircraft slid to a stop in anther 200-300 feet and did not leave the runway. The tower confirmed seeing the gear down on base and final.

Original NASA ASRS Text

Title: The pilot of a Mooney M20 experienced a landing gear collapse during landing for unknown reasons.

Narrative: Cleared to land 22R with a left base entry. The aircraft was configured for landing by base entry. Gear lever down; gear safe light illuminated and manual gear down indication; were observed. One more gear down and locked check on short final indicated gear down and locked. On round out the mains touched first followed by the nose gear. Approximately 1 second after the roll out had begun the left wing began to drop. The belly drug for about 200 feet before the propeller stuck the ground. The aircraft slid to a stop in anther 200-300 feet and did not leave the runway. The tower confirmed seeing the gear down on base and final.

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.