As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO FIRE 'DISCH' LIGHT ILLUMINATED DURING PREFLIGHT. GROUNDED - YES. REF B737-800 WDM 26-23-11-2-AT #1 BOTTLE PRESSURE SWITCH CONNECTOR D12792 AND #2 BOTTLE CONNECTOR D12816 VERIFIED GOOD GROUND AT PINS #1 AND #2 AND GOOD VOLTAGE (13.5 VDC) AT PIN #3. REINSTALLED CONNECTORS AND PERFORMED INITIAL EVALUATION PER FIM 26-23 TASK 802 - NO DEFECTS NOTED. DUE TO HISTORY OF THIS FAULT, SEAMC REQUESTS REPLACEMENT OF #2 BOTTLE. COMPLETED INSTALLATION OF #2 FIRE BOTTLE . REF W/C 78226001, OPS CHECK GOOD.