What was found
CARGO DOOR OPENED AFTER TAKEOFF, NO PRESSURIZATION ISSUES. FOUND THE AFT CARGO DOOR SWITCH SUPPORT LEVER WITH A LOT OF PLAY. REMOVED AND REPLACED THE AFT CARGO DOOR SWITCH IAW AMM 52-76-01-04, OPS CHECKED IAW AMM 52-76-01-05, AND PRESSURIZED AIRCRAFT IAW AMM 21-31-00, COULD NOT DUPLICATE FAULT.