What was found
AIRCRAFT ROLLS HARD TO RIGHT WHEN FLAPS ARE PAST 42 DEGREES. TRIM PAST HALF WAY MARK, LEFT WING DOWN REQUIRED TO KEEP AIRCRAFT BALANCED. (FLT 4521) CLEANED EXTREMELY DIRTY FLAP SURFACES.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT ROLLS HARD TO RIGHT WHEN FLAPS ARE PAST 42 DEGREES. TRIM PAST HALF WAY MARK, LEFT WING DOWN REQUIRED TO KEEP AIRCRAFT BALANCED. (FLT 4521) CLEANED EXTREMELY DIRTY FLAP SURFACES.