Standard:

• AS94
• Revision: A

Reaffirmed:

• 2006-05-11

Revised:

• 1973-08-01

Revision:

• Historical. Access the latest revision: AS94C

Issuing:

• E-25 General Standards For Aerospace And Propulsion Systems

Scope:

The purpose of Section I of this document is to specify the requirements for minimum safe performance of an altimeter system in its normal mode of operation on subsonic aircraft. Compliance with this section is a means of assuring that the altimeter system will satisfactorily perform its intended function when exposed to conditions encountered in routine aeronautical operations (normal operation). The instrument system specified shall accept an input of static pressure and in some equipment other inputs that contribute altitude information to provide a visual indication of pressure altitude. If equipped with an automatic correction mechanism, it shall indicate by a positive means when the automatic correction mechanism is not in use. If the static source pressure error compensating mechanism is operational it shall be functional throughout the required operating envelope of the particular aircraft. Each aircraft type has its own static source error data which shall be obtained from the airframe manufacturer's certified data. When a Central Air Data Computer is used in the altimeter system, the CADC shall be certified to its own governing document and the altimeter system (CADC and display) shall comply with the requirements of this document. NOTE: The instrument system specified herein does not include the aircraft pressure lines and pressure sources

History:

Standard	Published	Revision	Status
AS94C	2013-03-12	Latest	Stabilized
AS94B	2008-08-26	Historical	Revised
AS94A	1973-08-01	Historical	Reaffirmed
AS94	1943-01-01	Historical	Issued

AKA:

• SAE AS 94

Sector:

• Aerospace

Topic:

• Propellers and rotors
• Parts
• Gas turbines
• Hybrid engines
• Jet engines