As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS SOON AS FLAPS ARE SELECTED TO 45 DEG, ACFT BECOMES UNSTABLE AROUND A LONGITUDINAL AXIS. ACFT SNAPS TO THE LT AND RT WITHOUT AILERON INPUT, AND WHEN APPLYING AILERON , CORRECTION AILERONS DOS100-0080-01 EFFECTIVE UNTIL SIGNIFICANT. CLEANED AND PAINTED INBD FLAP TEFLON ABRASION STRIP IAW AMM 27-54-01.