As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, WE SELECTED THE FLAP HANDLE TO FLAPS 0. IMMEDIATELY AFTER THAT, WE GOT A FLAPS FAIL AMBER CAS. FLAPS DID NOT MOVE AND REMAINED AT 20 DEGREES. NEAR FREEZING TEMPS ON RON. REMOVED FAULTY FLAP CONTROL UNIT. P/N: 600-93000-121, S/N: 431 INSTALLED INSPECTED/TESTED FLAP CONTROL UNLT IAW CL650 AMM TASK 27-51-04-400-801. P/N: 600-93000-121, S/N: 244. OPERATIONAL TEST OF THE FLAP CONTROL UNIT IAW CL650 AMM TASK 27-51-04-710-801. OPERATIONAL CHECK GOOD. NO FAULTS NOTED AT THIS TIME.