As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: UNABLE TO OPEN FLIGHT DECK DOOR WHILE INSIDE FLIGHT DECK USING ROTARY RELEASE HANDLE. HAD TO SIMULTANEOUSLY ELECTRICALLY AND MECHANICALLY UNLOCK DOOR AND PULL HARD. REMOVED AND REPLACED COCKPIT DOOR LATCH MECHANISM PER AMM 52-51-21.