What was found
MAIN DOOR: SHORTLY AFTER TAKEOFF FROM KFLL, CABIN DOOR OPEN AND CHECK DOORS EICAS WAS DISPLAYED, CABIN ALSO STOPPED PRESSURIZING. //SIGNOFF //POWERED AIRCRAFT AND WAS ABLE TO DUPLICATE SQUAWK, GAINED ACCES TO CMC AND VERIFIED SWITCHES OPERATION AND VENT DOOR SWITCH WAS WORKING BUT IT FAIL ONE TIME AND DID NOT FALL AGAIN. GAINED ACCESS TO VENT DOOR AND SWITCH AND FOUND S5 SWITCH TO HAVE EXCESSIVE GAP. RESEARCHED A.M.M. AND MEASURED A GAP OF .180 AND MANUAL STATE THAT SHOULD BE .10. READJUSTED S5 VENT DOOR SWITCH AS REQUIRED AND ALSO FOUND VENT DOOR NOT CLOSING COMPLETLY. RIGGED VENT DOOR AS REQUIRED. PERFORMED GOOD OPERATIONAL CHECK WITH THE ACCESS OPEN. CLOSED ACCESS BY REINSTALLING CABIN DOOR STEPS AND TRIM PANELS. PERFORMED OPERATIONAL CHECK OF STEP ENTRY LIGHTS, OPS CHECK GOOD. PERFORMED OPERATIONAL CHECK OF CABIN DOOR, NO DEFECTS NOTED AT THIS TIME. WORK ACCOMPLISHED IN REFERENCE WITH CE 700 AMM CH 52-10·00 , 52-70--25, 52-10-43..