What was found
MCI - FLT 179 - DURING CLIMB, LANDING GEAR DOOR OPEN LIGHT ILLUMINATED AND LEFT MAIN LANDING GEAR UNSAFE RED LIGHT ILLUMINATED. VERIFIED LANDING GEAR WAS DOWN AND DOOR REMAINED OPEN. FOUND LEFT MAIN LANDING GEAR DOOR ACTUATOR BUSHING, MFG P/N S2210370P9-157, MISSING. INSTALLED BUSHING AND LANDING GEAR AND LANDING GEAR DOOR OPERATION CHECKED NORMAL.