As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS RETURNED TO THE GATE DUE TO THE LEFT AFT BOOST PUMP CIRCUIT BREAKER TRIPPING WITH REPORTED SMOKE AND ODOR. CORRECTIVE ACTION: MAINTENANCE FOUND R5-6001 CONNECTOR WIRES SHORTED. R5-6001 WAS REPLACED, PER SWPM 20-31-15. BONDING CHECK WAS GOOD, PER SWPM 20-50-01. OPERATIONAL CHECK OF THE LEFT AFT & FORWARD PUMPS AND THE LEFT WING LIGHTS WAS NORMAL. COMPLIED WITH SFAR88/CDCCL, PER B717 AMM 28-22.