As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY LIGHTS COME ON IN THE ARM POSITION, ALSO THE EMERGENCY CHARGER CIRCUIT BREAKER POPPED. THIS IS THE SECOND TIME THE CIRCUIT BREAKER POPPED, FOUND BATTERY POWER SUPPLY M1675 WITH ELECTRICAL ODOR. REMOVED AND REPLACED M1675, M1674 AND BATTERY PACKS. OPERATIONAL CHECKS OK PER B737 AMM 33-51-06-960-806 /805.