What was found
ON CLIMBOUT AFTER TAKEOFF, APROX 600 MSL, CARGO DOOR MESSAGE ED1 AND CAUTION LIGHT ILLUMINATED. CABIN CLIMBING APPROX 1400 FT PER MIN. C/W QRH. AFTER LANDING NOTED CARGO DOOR HANDLE POPPED. FOUND CARGO DOOR HANDLE EXTENDED UPON ARRIVAL AT GATE. STOWED CARGO DOOR HANDLE, PRESSURIZED AIRCRAFT, NO DEFECTS NOTED W/ CARGO DOOR WARNING SYS, OPS CHECK OF CARGO DOOR HANDLE GOOD IAW AMM 52-31-03. OK FOR CONTINUED SERVICE. (K)