What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The PIC said he was conducting a test flight. After departure the landing gear would not come up. The PIC left the gear handle in down position and remained in the pattern at Bend muni to return for landing. The PIC said the landing was uneventful, but while rolling out the nose and left main gear collapsed. The PIC later discovered he had wired the squat switch backwards causing the gear to retract on roll out after deaccelerating past 40 knots.
As the FAA filed it
THE PIC SAID HE WAS CONDUCTING A TEST FLIGHT. AFTER DEPARTURE THE LANDING GEAR WOULD NOT COME UP. THE PIC LEFT THE GEAR HANDLE IN DOWN POSITION AND REMAINED IN THE PATTERN AT BEND MUNI TO RETURN FOR LANDING. THE PIC SAID THE LANDING WAS UNEVENTFUL, BUT WHILE ROLLING OUT THE NOSE AND LEFT MAIN GEAR COLLAPSED.THE PIC LATER DISCOVERED HE HAD WIRED THE SQUAT SWITCH BACKWARDS CAUSING THE GEAR TO RETRACT ON ROLL OUT AFTER DEACCELERATING PAST 40 KNOTS.