Standard:

• AIR1639

Reaffirmed:

• 1994-02-01

Revised:

• 1981-10-30

Revision:

• Historical. Access the latest revision: AIR1639A

Issuing:

• Ae-6 Starting Systems And Auxiliary Power Committee

Scope:

Several methods of starting and motoring turbine engines are available. Some of the more common methods include hydraulic, electric, and pneumatic starting. This report presents the safety guidelines for design of a pneumatic system. A pneumatic system basically consists of an air turbine mounted on the engine accessory gearbox which is supplied compressed air from either an onboard or external compressed air source. A pneumatic shutoff valve is normally installed in the airframe to control operation of the starter.

History:

Standard	Published	Revision	Status
AIR1639A	1999-03-01	Latest	Revised
AIR1639	1981-10-30	Historical	Reaffirmed

AKA:

• SAE AIR 1639

Sector:

• Aerospace

Topic:

• Parts and Components
• Ignition systems
• Gas turbines
• Hybrid engines
• Hydraulic systems
• Pneumatic systems
• Safety