What was found
DURING HEAVY MX CHECK, FOUND AT OPS CHECK, AFT SERVICE DOOR EMERGENCY SLIDE FAILED TO OPEN. REPACKED PNEUMATIC ASSY. REMOVED & REPLACED DIAPHRAGM.SERVICED AND PERFORMED EMERGENCY EVACUATION SLIDE MECHANISM OPS TEST IN REF TO E190 AMM 52-42-40,52-42-51,52-42-53 SATISFACTORY. NOTE: THE DIAPHRAGM WAS REPLACED AGAIN AFTER SUCCESSFUL TEST.