What was found
LEFT O/B AILERON O/B COUNTER BALANCE WEIGHT ARM SKIN IS CORRODED AT FWD UPPER TIP. REMOVED AND REPLACED LEFT AILERON BALANCE MAST ASSY, IAW SRM 51-40-02, SRM 51-40-04 AND DWG 1177106 & 113T7100. REMOVAL, REINSTALLED & BALANCED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT O/B AILERON O/B COUNTER BALANCE WEIGHT ARM SKIN IS CORRODED AT FWD UPPER TIP. REMOVED AND REPLACED LEFT AILERON BALANCE MAST ASSY, IAW SRM 51-40-02, SRM 51-40-04 AND DWG 1177106 & 113T7100. REMOVAL, REINSTALLED & BALANCED.