As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT THE FLIGHT DECK ACCESS LOCK INTERMITTENTLY DOES NOT UNLOCK WHEN FLIGHT DECK ACCESS SYSTEM SWITCH IS TURNED OFF. FLIGHT CREW REPORTED THAT THE LOCK FAIL LIGHT DOES NOT ILLUMINATE AND THERE IS NO AUDIBLE SOLENOID DISENGAGE. MAINTENANCE LUBRICATED THE DOOR LATCH ASSEMBLY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-51-01.