Incident Overview
An airplane experienced a right main landing gear collapse during landing. The pilot reported that during the approach, the landing gear down indication was not received. The pilot did not activate the emergency landing gear extension system.
Postaccident Examination
A detailed examination of the aircraft after the incident revealed that the electric motor for the hydraulic system had an open electrical circuit. The emergency landing gear extension system was tested and found to have no anomalies.
Sequence of Events
The landing gear collapse occurred at touchdown. The pilot had noted a lack of gear-down indication on approach but continued the landing without resorting to the emergency extension procedure. The reason for not using the emergency system was not stated in the source.
System Findings
The open circuit in the hydraulic system motor rendered the normal gear extension inoperative. Since the emergency extension system operates independently and was found functional, it could have been used to lower the gear manually. No other mechanical issues were identified.