Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 150; Flight Crew Total 2000; Flight Crew Type 850
Aircraft Equipment Problem Critical; Ground Event / Encounter Ground Strike - Aircraft
Aircraft Aircraft Damaged; General Evacuated; General Maintenance Action
Aircraft
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.
The reporter indicated that the event was not a hard landing. He added that the single gear position indicator; the gear safe light; was verified several times prior to landing. The left main gear collapsed initially; but only partially. The nose and right main gear in a 'less extended' position. The landing gear system is linked together by pushrods and the failure of one rod may have affected other portions.
The pilot of a Mooney M20 experienced a landing gear collapse during landing for unknown reasons.