IGNITION
Ignition system provides the initial spark to ignite the fuel-air mixture into the
combustion chamber. Each engine has its proper ignition system that
consists of one ignition exciter, two high-tension cable assemblies and two
spark igniters. The exciter transforms the 28V DC input into a pulsed high
voltage output.
The ignition system operates during the engine starting phase only.
The ignition systems of engines 1 and 2 are supplied by ESS 1 and ESS 2
buses via the IGN 1 and IGN 2 circuit breakers, respectively.
The IGN circuit breakers are fitted with a white plastic ring that allows the
pilot to quickly locate them and manually trip them for engine motoring.