What was found
AFTER TAKEOFF, A FEW MINUTES AFTER GEAR WAS RAISED THE LEFT MAIN REG LIGHT ON THE FWD PANEL ILLUMINATED. NO LIGHTS ON S/O'S PANEL. CYCLED THE GEAR AND ALL LIGHTS EXTINGUISHED. LIGHTS ILLUMINATED AGAIN DURING APPROACH PHASE. REPEAT WRITE-UP. REPLACED D1-81 LT MAIN GEAR DOOR UP AND LATCHED SENSOR IAW MM 32-61-03, OPS CKS GOOD.