What was found
WHILE PERFORMING AN OVERSPEED SHUT-DOWN CHECK ON RIGHT ENGINE, THE ENGINE FAILED TO SHUT DOWN WHEN OVERSPEED TEST SWITCH WAS THROWN. THE PROBLEM WAS TRACED TO THE OVERSPEED CONTROLLER. THE UNIT WAS REPLACED AND OPS CHECKED NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE PERFORMING AN OVERSPEED SHUT-DOWN CHECK ON RIGHT ENGINE, THE ENGINE FAILED TO SHUT DOWN WHEN OVERSPEED TEST SWITCH WAS THROWN. THE PROBLEM WAS TRACED TO THE OVERSPEED CONTROLLER. THE UNIT WAS REPLACED AND OPS CHECKED NORMAL.