FAA Private Pilot Knowledge Test > 2.12: Engine Ignition Systems > Flashcards
One purpose of the dual ignition system on an aircraft engine is to provide for
improved engine performance.
If the ignition switch ground wire becomes disconnected, the magneto
may continue to fire.
The reason a 4-cylinder reciprocating engine continues to run after the ignition switch is positioned to OFF may be a
broken magneto ground wire.