As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RAMP REPORTED THAT WHEN TRYING TO PRESS THE MAIN CABIN DOOR RELEASE BUTTON (OUTSIDE OF AC) THAT THE BUTTON JAMS ON THE MCD LEVER. UNABLE TO OPEN FROM OUTSIDE. REMOVED FROM SERVICE PERFORMED OPS TEST OF THE MAIN CABIN DOOR IAW Q400 AMM 52-11-00-710-802. OPS TEST GOOD. NO FURTHER DEFECTS NOTED.E. AIRCRAFT RETURNED TO SERVICE.