What was found
AUTOMATIC DOOR LOCKING AND UNLOCKING PUSH BUTTON WOULD NOT UNLOCK FLIGHT DECK DOOR. HAD TO USE EMERGENCY DOOR OPENING MANUAL LATCH. PLACED ON MEL 52-51-00A.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AUTOMATIC DOOR LOCKING AND UNLOCKING PUSH BUTTON WOULD NOT UNLOCK FLIGHT DECK DOOR. HAD TO USE EMERGENCY DOOR OPENING MANUAL LATCH. PLACED ON MEL 52-51-00A.