Cessna 402/402C/B379 Businessliner/Utiliner
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Commercial
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Aircraft Aircraft Damaged; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Gate; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
During the run up phase of the flight; the right alternator out light illuminated; then remained steady. Shortly after a burning electrical smell was noticed by both the Captain and myself. It was decided to return to the terminal and [request priority handling] for safety purposes. During the taxi back the Emergency Checklist was completed and the smell dissipated. Upon arrival at the terminal the flight was disembarked and the passengers were directed to a safe area. The fire department checked the aircraft. No further issues found.
During the run up phase of the flight; the R ALT OUT light illuminated intermittently; then remained steady. Shortly thereafter a burning electrical smell was noticed by both the crew members. It was determined that a immediate return to the terminal was required. As PIC I elected to request priority handling and requested fire services at the terminal. Once we received taxi clearance back to the terminal; as a crew; we ran the Red Box Items for smoke in the cabin. Before pulling the Battery/Alternator Gang bar I notified ground that we will be shutting down electrical power and notified ZZZ Ops that we were returning to the terminal and need to expedite the passengers disembarking and that the fire department is responding. Once we reached the terminal; as the fire department was arriving to the aircraft I briefed the passengers on the situation and told them to exit the aircraft and remain behind the wing as the gate agent opened the door. I elected to not execute a emergency evacuation as it was determined the burning electrical smell was dissipating once we shut down the electrical sources. The flight concluded without further incident. A burned up alternator; the electrical smell may have been due to the alternator burning up and the cabin ventilation was sucking in the fumes.
Flight Crew reported that an alternator failed during engine run up; resulting in a return to the gate.