What was found
AFTER TAKEOFF AND GEAR RETRACTION ALL GEAR LIGHTS WENT OUT. APPROX 5-10 INTO FLIGHT, NOTICED RT GREEN GEAR LIGHT WAS ON. NO OTHER ABNORMAL LIGHTS NOTED. 40 MINUTES LATER LIGHT EXTINGUISHED. TROUBLESHOT SYS BY RIGING ALL DOWN LOCK SWITCH WIRING AND SWITCH MOUNTED TO RT GEAR ACTUATOR AND AFTER COLD SOAKING FOUND SWITCH SR008 (DOWNLOCK SWITCH) HAD A 2.209 M OHM READING WHEN OPEN (SHOULD BE NO READING). REPLACED MLG ACTUATOR WITH A RENTAL UNIT AND OPERATIONAL CHECKS WERE GOOD. RESERVICED EMERGENCY PNEUMATIC GEAR EXTENSION. (K)