As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING ALT EXTENSION DOOR FLOOR DOES NOT FULLY OPEN. REMOVED FROM SERVICE. SUSPECT SPILL CONTAMINATION ON ALTERNATE SELECT VALVE ACTUATOR PLUNGER. CLEANED IAW Q400 AMM MCN 61225-01 ISSUE 1 ALT EXTENSIION DOOR OPERATES NORMAL RETURNED TO SERVICE. NO PARTS REPLACED.