Boeing 737-800 - 15 General Controls and Indicators; Engine Start Switches

737 Flight Crew Operations Manual
Engines, APU Chapter 7
General Controls and Indicators Section 15
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D6-27370-866-EGP 7.15.1
15 General Controls and IndicatorsGeneral Controls and IndicatorsFile Highlig ht
Engine Start Switches
1 ENGINE START Switches
GRD –
• opens start valve
• closes engine bleed valve
• for ground starts, arms selected igniter(s) to provide ignition when
engine start lever is moved to IDLE
• for inflight starts, arms both igniters to provide ignition when engine
start lever is moved to IDLE
• releases to OFF at start valve cutout.
OFF –
• ignition 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%.
CONT –
• provides ignition to selected igniters when engine is operating and
engine start lever is in IDLE
• in flight - provides ignition to both igniters when N2 is below idle and
engine start lever is in IDLE.
FLT – provides ignition to both igniters when engine start lever is in IDLE.
ENGINE START
BOTH
L
GRD
OFF
CONT
FLT
IGN
IGN
R
2
1
GRD
OFF
CONT
FLT
FORWARD OVERHEAD PANEL
2
1
September 28, 2006