As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH THE FLAPS FAILED TO EXTEND PAST 12 DEGREES. THE CREW ABORTED THE LANDING & DIVERTED TO AN AIRPORT WITH A LONGER RUNWAY. TROUBLESHOOTING FOUND THE RT FLAP FOLLOW UP SWITCH PN 45AS61015-23 DEFECTIVE. THE SWITCH WAS REPLACED WITH AN OVERHAULED UNIT & RIGGED IAW AMM. OPERATIONS CHECKED OK.