Beechjet 400
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 35; Flight Crew Total 5036; Flight Crew Type 1495
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Aircraft Aircraft Damaged; Flight Crew FLC complied w / Automation / Advisory; General Flight Cancelled / Delayed; General Maintenance Action; General Evacuated
Aircraft
Aircraft was on ground commencing with engine start. During start sequence; PIC and myself noticed that after initial start; (right engine) the battery was not reducing to the recommended 150 amps very quickly. It did after a few minutes; and we commenced with number one engine start. After number one start; upon selecting Start Select off; Gen 2 pegged on the ammeter. At this point; both generators tripped automatically. Then 'Batt Only' came online and both engines were cut off by the PIC. After I exited the plane; I observed smoke emitting from the rear of the fuselage. I ran back to the cabin and had every passenger exit the aircraft immediately. Any suspected fire in the plane extinguished on its own without any external fire suppression. After the aircraft was placed in the hangar; upon inspection; Maintenance personnel observed a suspected failure of the aircraft MOSFET box (electrical transistor) in the tailcone. These components were incinerated to an extreme amount. Also; the right tail horn was burned as well. It is important to note that this Beechjet returned to service exactly one month after a lengthy maintenance interval was completed.
BE400 First Officer reported a high generator amperage after starting the second engine causing both generators to trip. The Captain shut both engines down and the passengers were asked to evacuate when smoke was seen coming from the tail of the aircraft.