How to Start a Jet Engine

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Introduction

Have you ever wondered if starting a jet airliner is as simple as turning a key? Well, here is a brief description of how to start a jet engine. Every aircraft and engine type may be slightly different, but this will give you the general idea for most jet engines (other than the new bleed less engines to be used on the new Boeing 787).

By: Kiwi Sauce

Length: 1:05

Comments: 4

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Instructions

Text Size: +
Difficulty: Easy

Tips & Warnings:

  • During starts, watch out for any abnormal indications. If there are any abnormalities, abort the start by moving the Engine Start Leavers to the CUT-OFF position.
  • Make sure the parking break is set.
Step1
A standard jet engine required a high pressure airflow to start the fan turning. This is usually generated by the Auxillary Power Unit (APU) of the aircraft. In some cases, an external source of air can be used. This is what is referred to as an "air start". First things fist, start the APU by selecting APU switch to start on the overhead panel.
Step2
Monitor the APU gauges until the readings are stabilized. Turn the APU bleed switch to the on (down) position, and turn the left and right pack switches to the off position. Monitor the pressure gauge and ensure at least 30 psi.
Step3
Switch the engine start knob to 'GND'. This will start the engine rotating.
Step4
Monitor the N2 engine gauge and wait until it reaches 25%.
Step5
Then move the fuel flow lever from cut off to the idle Detent. This introduces fuel to the engine. When N2 reaches 46% the Engine Start Switch will move to the off position automatically.
Step6
You have now successfully started your first engine. Repeat the process with any remaining engines.

Comments

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francis23

francis23 said

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on 2/19/2008 anyone who has a flight simulator spedracer its for you you may set all into a 100 reality like mine in flight sim '04

tommyboy2k

tommyboy2k said

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on 9/29/2006 This makes me want to go to Flight School! The closest I ever got to starting a jet engine was with my model airplanes.

Spave

Spave said

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on 9/28/2006 This is pretty cool, thanks!

SpeedRacer

SpeedRacer said

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on 9/28/2006 Awesome details and pictures. Now if I only knew how to take off and land a plane. Can you write me a weHow for that?

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eHow Article: How to Start a Jet Engine

Article By: Kiwi Sauce

Kiwi Sauce

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Category: Travel

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