Baron pilot reported a gear collapse on landing.

Attributes
ACN	1740800
Time
Date	202004
Local Time Of Day	0601-1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Baron 58/58TC
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Landing Gear
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 156 Flight Crew Total 21000 Flight Crew Type 1500
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

This was the first flight after annual inspection of the aircraft. Upon takeoff the gear would not retract. The gear indication was unsafe. I noticed that the landing gear motor breaker had popped out. I reset the circuit breaker only to have it pop out again. On the third attempt; the breaker stayed in and the gear retracted. We continued on to take on fuel and to have a longer runway in case we encountered any other problems. I put the gear down early and flew the pattern with the gear down. The gear lights were checked multiple times with all times showing three green lights. After landing and during roll out at approximately 45 kts.; the left main landing gear appeared to collapse followed by the nose gear. As we were sliding toward the left side of the runway; I closed the mixture levers. As soon as we stopped; I turned the master switch off and we quickly exited the aircraft.

Original NASA ASRS Text

Title: Baron pilot reported a gear collapse on landing.

Narrative: This was the first flight after annual inspection of the aircraft. Upon takeoff the gear would not retract. The gear indication was unsafe. I noticed that the landing gear motor breaker had popped out. I reset the circuit breaker only to have it pop out again. On the third attempt; the breaker stayed in and the gear retracted. We continued on to take on fuel and to have a longer runway in case we encountered any other problems. I put the gear down early and flew the pattern with the gear down. The gear lights were checked multiple times with all times showing three green lights. After landing and during roll out at approximately 45 kts.; the left main landing gear appeared to collapse followed by the nose gear. As we were sliding toward the left side of the runway; I closed the mixture levers. As soon as we stopped; I turned the master switch off and we quickly exited the aircraft.

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.