As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT ON FLIGHT #2726, FLAP CAUTION LIGHT ILLUMINATED. FLAPS OPERATED NORMAL ON APPROACH. AIR RETURN TO MEM. MAINTENANCE RE-RACKED WARNING ELECTRICAL UNIT. PERFORMED OPS CHECK OF FLAP SYSTEM IAW SF3 MM 27-51-00-5 PROCEDURE 3. OPS CHECK GOOD. A/C RETURNED TO SERVICE