Incident Overview
A pilot reported that when attempting to extend the landing gear using the gear selector, the gear did not extend. The pilot then manually extended the gear by cranking until resistance was felt, but no gear down and locked indication was received in the cockpit.
Precautionary Measures
Ground personnel advised the pilot that the landing gear appeared to be extended. The pilot proceeded with a normal approach and landing.
Collapse During Landing Roll
During the landing roll, the pilot applied the brakes. At that point, the main landing gear collapsed.
Investigation Findings
Subsequent investigation revealed that the landing gear slide tubes lacked lubrication and that the right main landing gear slide tube was corroded.
Aircraft Maintenance History
The aircraft had flown 16.25 hours since its most recent annual inspection, which was performed on November 3, 1992.