As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN FLAPS 45 DEGREES SELECTED A/C STARTS TO VIBRATE AND ROLL TO LEFT. DUIRNG TAKEOFF FLAPS 20 EXCESSIVE RIGHT AILERON TRIM REQUIRED. PERFORMED BLENDING OF L/E TEFLON STRIP OF FLAPS IAW SL-RJ-27-022 AMM 27-15 AND AMM 27-54-01-370-001 SECTION 8. (M)