What happened
Following a normal start of the No. 2 engine, the pilot provided hand signals to the ground marshaller to disconnect ground power and remove the wheel chocks. After the ground marshaller disconnected the power cord and secured it to the ground power cart, she attempted to pull the nose wheel chocks; during this process, the nose tire ran over her foot.
As the airplane taxied forward, the No. 2 propeller collided with the ground power cart. This impact ignited a fire in the No. 2 engine, which subsequently spread to the ground and underneath the aircraft. Without receiving any communication from the cockpit, the flight attendant initiated an emergency evacuation of the passengers. During the evacuation, 3 passengers sustained minor injuries due to tripping and falling on the tarmac. The airport fire department arrived and extinguished the flames within 3 minutes of the fire's start.