As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEST FAILED. NOTHING HAPPENED WHEN ATTEMPTING THE DOORBELL MODE OR THE EMERGENCY UNLOCK WERE ATTEMPTED. ENABLED COCKPIT DOORBELL FUNCTION IAW B737 AMM 52-51-00-900-802 AND PERFORMED SATISFACTORY FLIGHT COMPARTMENT DOOR SECURITY ACCESS SYSTEM TEST IAW B737 AMM 52-51-00-700-801.