As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION - TROUBLESHOOTING FLAP FAIL CAUTION FOUND FLAP TORQUE TUBE INBOARD OF LEFT NR 2 FLAP ACTUATOR SEVERLY CORRODED BETWEEN WS 97.45 AND WS 148.00 AND NEARLY SHEARED (BETWEEN WS 97.45 AND WS 148.00). THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT INBOARD NR 2 FLAP TORQUE TUBE AND COTTER PIN IAW CRJ-700 AMM 27-52-01. COTTER PIN PART NUMBER: MS24665-132. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.