As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - FLT 606 - ON CLIMB-OUT, BATTERY AND LEFT EMERGENCY AC INDICATED ZERO VOLTS AND ZERO AMPS. AIRCRAFT AIR INTERRUPTED AND RETURNED TO LAX WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND LEFT BATTERY QUICK DISCONNECT LOOSE. SECURED LEFT BATTERY QUICK DISCONNECT. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)