Boeing 737 NG Systems Review
Forward Overhead Panel  700/800/900
Display Selector
Engine Start Panel
ENGINE START Switches

Option - Without automatic ignition

OFF –

  • Ignition is normally off.

  • Both igniters are activated when engine start lever is in
    IDLE and:
  • An uncommanded rapid decrease in N2 occurs or,
  • N2 is between 57% and 50% or,
  • in flight - N2 is between idle and 5%.
Auto Ignition Option