L-1011 Engine: Ignition Schematic

The L-1011 has a dual ignition system used on each engine. The features of the system are:

• Two igniters per engine 
• Two ignition units
• Systems identified as A and B

Each unit is capable of high and low energy output.

• High energy used for engine start 
• Low energy used for continuous ignition requirements 

The every modes are selectable and are:

• Armed by the ENGINE START panel switches 
• Initiated by FUEL AND IGNITION switch on the center console 
• Automatically terminated by switches in the N3 tachometer
• Start and continuous ignition cannot be energized simultaneously