Standard:

• AS404
• Revision: B

Reaffirmed:

• 1991-05-01

Revised:

• 1959-02-01

Revision:

• Historical. Access the latest revision: AS404C

Issuing:

• A-4 Aircraft Instruments Committee

Scope:

This Aeronautical Standard covers magnetic drag tachometers with or without built-in synchroscopes.

History:

Standard	Published	Revision	Status
AS404C	2001-07-01	Latest	Reaffirmed
AS404B	1959-02-01	Historical	Reaffirmed
AS404A	1954-12-15	Historical	Revised
AS404	1948-11-01	Historical	Issued

AKA:

• SAE AS 404

Sector:

• Aerospace

Topic:

• Avionics
• Aircraft instruments
• Flight control systems
• Flight management systems
• Electrical Systems
• Displays
• Smoke detection
• Instrument panels
• Parts
• Safety
• Fire detection
• Tests and Testing