What was found
(CAN) ON CLIMB PASSENGER DOOR WARNING LIGHT ON. AIRCRAFT RETURNED. INVESTIGATION FOUND THE DOOR DIFFICULT TO CLOSE WITH THE LATCH ONLY CATCHING AT ABOUT THE HALF WAY TO FULL LATCH POSITION. WHEN PANELS WEREREMOVED THE DOOR ACTUATOR SHAFT WAS BADLY CORRODED AS WERE BOTH PUSH PULL RODS, AND ROD ENDS. THE INTERIOR OF THE DOOR WAS VERY DIRTY AND THE LOWER BELLCRANK PIVOT WAS RUSTED AND THE BOLT SEIZED. INV ESTIGATION OF THE PREVIOUS MAINTENANCE FOUND THAT THE RESPONSIBLE MECHANIC WAS VERY NEW TO THE INDUSTRY. STEPS UNDERTAKEN TO ENSURE FUTURE AND PROPER COMPLIANCE WITH MAINTENANCE PROGRAM.