As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING 12 YEARS MAJOR AIRFRAME INSPECTION, RT WING SPOILER ACTUATOR WAS REMOVED TO GAIN ACCESS TO INSPECT THE RT FLAP ACTUATOR ATACHMENT FITTING. WHEN HANDLING THE SPOILER ACTUATOR FOUND PITTING COROSION ON THE PISTON-ROD (CHROME SURFACE). NEW PART ORDERED. NEW PART WILL BE INSTALLED.