747 Engine Start & Fuel Jettison
by jerome meriweather
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Up to Fire/APU
Left to Electrical
Right to Air Conditioning
Down to Fuel System
To View a Control's Description, MouseOver it and ...
Click to "Show" - MouseDown to "Drag" - DoubleClick to "Hide"
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747 Photo and/or Graphic Element
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Engine Start Lights (White)
Indicate start valve open.
STBY Ignition Selector
- NORM - AC power system supplies power to igniter(s) selected with the AUTO IGNITION selector.
- 1 or 2 - Main standby bus supplies power continuously to the respective igniter.
CON Ignition Switch
- ON - Igniter(s) selected with the AUTO IGNITION selector operate(s) continuously.
AUTO Ignition Selector
- 1, BOTH, 2 - Selects igniters to operate automatically when any of the following occur:
- Engine in start cycle with N2 less than 50%.
- Trailing edge Flaps not up.
- Nacelle Anti-Ice is on.
Fuel to REMAIN Knob
Selects fuel-to-remain after Fuel Jettison.
Fuel Jettison Selector
- OFF - Disarms system, removes EICAS FUEL TO REMAIN display.
Fuel Jettison NOZZLE Switches
- ON - Associated nozzle valve opens.
- Nozzle Valve Light - Indicates nozzle valve position does not agree with switch position.