As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKEOF, 15 DEGREE FLAP SELECTED AND THEN FLAPS SELECTED UP. ONLY LEFT SIDE WENT UP. RIGHT SIDE STAYED DOWN. LANDED WITHOUT INCIDENT. CABLE ENDS AT GEARBOX FOUND SHEARED. SUBMITTER SUSPECTS A PREVIOUS OVERLOAD OF FLAP SYSTEM THAT STRESSED THE CABLES.