Airliner 99
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Commercial
Troubleshooting
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Shortly after gear retraction; I heard an electrical pop and looked down to see a shower of sparks coming from beneath the instrument panel raining down on my legs. I immediately requested left traffic to return to land on Runway XXR at ZZZ. After the initial pop and sparking; there were no further indications of malfunctioning equipment or any signs of smoke or electrical smell. I returned to land without further incident. [Tower called for fire rescue]. The equipment followed me from the runway to the parking spot. The firemen collected my information and used a thermal camera to look for hot spots on the panel.
Beech 99 Captain reported a shower of sparks from behind the control panel after takeoff and returning to the departure airport.