As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD CARGO FIRE LIGHT WONT ILLUMINATE DURING FIRE TEST. DOES ILLUMINATE DURING LIGHTS TEST. GROUNDED - YES. CARGO BAY SMOKE DETECTION OPERATIONAL TEST DONE REF B737-900 AMM 26-16-00-710-801: NO FAULTS FOUND. CONTROL PANEL DET SELECT SWITCH RETURNED TO NORMAL.