What was found
AFTER LIFTOFF- RETRACT GEAR, APPROX 30 SEC. AFTER DARK LANDING GEAR PANEL WE GOT A ILLUM. GEAR HANDLE AND 2 UNSAFE MAIN GEAR (RT RED) LIGHTS, LASTED APPROX 5 SEC. AFTER THAT ALL LIGHTS WENT OUT AND STAYED THAT WAY. PERFORMED ALTERNATE GEAR EXTENSION. LANDED UNDER NORMAL WEIGHT WITHOUT INCIDENT. TOWED TO THE GATE. INSPECTED MLG DOOR LINKAGE, AND ADJUSTED OF MLG DOOR PROX SENSORS TARGETS IAW AMM TASK 32-12-01-830-801. ALL CHECKS GOOD NO DEFECTS NOTED. CHECK FLIGHT OK RETURNED TO SERVICE.