What was found
(CAN) DURING A C CHECK INSPECTION WHILE PERFORMING THE CREW ESCAPE HATCH FUNCTIONAL CHECK, MAINTENANCE WERE UNABLE TO OPEN THE HATCH USING THE EXTERNAL HANDLE. THE HANDLE WOULD NOT UNLATCH WHEN THE EXTERNAL TRIGGER WAS PUSHED.FURTHER VERIFICATION ON THE BENCH REVEALED CORROSION ON THE INNER SHAFT OF THE EXTERNAL ASSEMBLY. THE HANDLE WAS REMOVED AND A NEW HANDLE WAS INSTALLED.