As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SELECTING FLAPS TO 45° AIRCRAFT WANTED TO ROLL LT. REQUIRED A SIGNIFICANT AMOUNT OF RWD AILERON TRIM TO COMPENSATE. FLT 6281 REPLACED LT OTBD FLAP IAW AMM. PN 601R14501-841, SN ON SB/RJ/585, PN OFF 601R14501-1 & SN OFF SB/RJ/071.