What was found
MASTER WARNING IN FLIGHT, MAIN CARGO DOOR, LIGHT ILLUMINATED ON CLIMB OUT, PASSING FL180. LIGHT EXTINGUISHED ON DESCENT PASSING 7000'. OPERATED & INSPECTED MAIN CARGO DOOR, NO DEFECTS AT THIS TIME, PRESSURIZED ACFT, ALL CHECKED GOOD. OK FOR CONTINUED SERVICE IAW AMM 52-71-00, 52-32-00 & 5-51-24.