Incident
An airplane was positioned near the end of a runway with engines shut down during an air traffic control delay. After approximately 15 minutes, ground control informed the flightcrew that they should start their engines in anticipation of a takeoff release. The captain reported being unable to start the right engine. After performing a clearing procedure, the left engine was started without issue. The crew then attempted to restart the right engine.
Evacuation
Airport Rescue and Firefighting (ARFF) personnel parked near the airplane observed smoke and flames coming from the right engine and reported this to air traffic control. The cockpit did not indicate any fire warnings. The flightcrew performed the ENGINE FIRE checklist and discharged both fire suppressant bottles into the engine. They eventually shut down both engines. ARFF requested that the flightcrew begin evacuating the airplane. All passengers were directed to the front of the aircraft and evacuated using the 1L and 1R doors.
Injuries
A witness reported that the injured passenger stepped onto the slide after exiting the airplane, bounced down the slide, and went over the side approximately four to five feet above the ground, sustaining a broken wrist.
Investigation
The investigation revealed that the engine start fuel scheduling for the Fuel Control Unit was high. Additionally, the ignition exciter box and igniter plugs were tested. The ignition exciter box was found to operate intermittently on the D.C. circuit, which would be used for engine start.