As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN DOOR DIFFICULT TO OPEN AND CLOSE. REMOVED FROM SERVICE. PERFORMED OPS TEST OF MAIN CABIN FWD PASSENGER DOOR IN REF WITH Q400 AMM TASK 51-11-00-710-802. ALSO OPENED AND CLOSED IT SEVERAL TIMES . NO ISSUES WAS FOUND. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.