PA-24 Comanche
Flight Crew Private
Flight Crew Last 90 Days 30.4; Flight Crew Total 171.1; Flight Crew Type 38.4
Troubleshooting
Aircraft Equipment Problem Critical; Ground Event / Encounter Other / Unknown
Aircraft Aircraft Damaged
Aircraft
Taking my airplane up to test the new avionics installed. Upon completion; made a VFR approach to [the] Runway. Selected gear down abeam the runway markings; observe a green indicator; added flaps and configured the plane for landing. Upon touchdown the gear collapsed and the plane came to a rest shortly there after.
Private Pilot reported difficulties with landing gear extension. Pilot landed and gear collapsed bringing aircraft to a stop.