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Standard

Accelerometer Group, Counting (MS25447 and MS25448)

2012-08-22
CURRENT
AS22145A
This specification covers the design and performance requirements for a single axis, four load-factor level counting accelerometer group referred to hereafter as “equipment.”
Standard

Flight Directors (Turbine-Powered Subsonic Aircraft)

2012-08-22
CURRENT
AS406A
This standard covers flight directors for use on aircraft to indicate to the pilot, by visual means, the correct control application for the operation of an aircraft in accordance with a preselected flight plan.
Standard

Automatic Pilots

2012-08-22
CURRENT
AS402C
This Aeronautical Standard covers Automatic Pilots intended for use on aircraft to automatically operate the aerodynamic controls to maintain flight and/or to provide maneuvering about the three axes through servo control.
Standard

Fuel and Oil Quantity Instruments

2012-08-22
CURRENT
AS405D
This Aeronautical Standard covers two basic types of instruments as follows: Type I - Float Instruments Type II - Capacitance Instruments
Standard

Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays

2002-05-02
CURRENT
AIR1093A
The purpose of this AIR is to provide recommendations for the minimum dimensions of characters and symbols used in aircraft instrument dials and panel displays as related to the conditions stated in para. 3. Numerous variables influence the legibility of aircraft instrument dial characters. This situation makes it very difficult, if not impossible, to establish an exact act of rules for optimizing all installations. Character size, one of the important considerations, can be optimized where adequate dial space exists. Usually this is not the case and the designer is faced with placing the information in a limited space while continuing to strive for error-free legibility. Appropriate minimum size requirements have been stated herein for guidance in air transport use.
Standard

Automatic Pilot Installations

2001-10-01
CURRENT
ARP419A
These recommendations cover the mechanical and electrical installation and installation test procedures for automatic pilots of the type normally used in transport type aircraft. The material in this ARP does not supercede any airworthiness requirement in the Civil Air Regulations.
Standard

Stall Warning Instrument (Turbine Powered Subsonic Aircraft)

2001-10-01
CURRENT
AS439A
This standard covers stall warning instruments to provide positive warning to the pilot of an impending stall. Stall, as defined for the purpose of this standard, is the minimum steady flight speed at which the airplane is controllable.
Standard

Airstream Deviation Instrument (ADI)

2001-07-01
CURRENT
ARP794A
This recommended practice covers an instrument which measures and displays angle of deviation of the airstream dependent on mounting location on the aircraft.
Standard

Pressure Ratio Instruments

2001-07-01
CURRENT
ARP427A
This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the Indicator.
Standard

Compass System Installations

2001-07-01
CURRENT
ARP426A
These recommendations cover the mechanical and electrical installation and installation test procedures for Compass Systems of the type normally used in transport type aircraft. The recommendations in the ARP do not supersede any airworthiness requirements in Civil Air Regulations.
Standard

Automatic Pilots

2001-07-01
HISTORICAL
AS402B
This Aeronautical Standard covers Automatic Pilots intended for use on aircraft to automatically operate the aerodynamic controls to maintain flight and/or to provide maneuvering about the three axes through servo control.
Standard

Total Temperature Measuring Instruments (Turbine powered Subsonic Aircraft)

2001-07-01
CURRENT
AS793A
This standard covers three basic types of total-temperature-measuring instruments used as a means of determining the total temperature developed by adiabatic heating of the air due to motion of the aircraft through the air. Type I - Flush-type total-temperature sensor Type II - Probe-type total-temperature sensor (electrically heated) Type III - probe-type total-temperature sensor (unheated)
Standard

Fuel and Oil Quantity Instruments

2001-07-01
HISTORICAL
AS405C
This Aeronautical Standard covers two basic types of instruments as follows: Type I - Float Instruments Type II - Capacitance Instruments
Standard

Accelerometer Group, Counting (MS25447 and MS25448)

1999-07-01
HISTORICAL
AS22145
This specification covers the design and performance requirements for a single axis, four load-factor level counting accelerometer group referred to hereafter as “equipment.”
Standard

Remote Servoed Air Data Instruments for Subsonic Aircraft

1996-12-01
CURRENT
AS791
This standard provides minimum performance criteria for air data instruments intended to provide cockpit indication of: a Indicated airspeed (Vi) b Computer airspeed (Vc) c True airspeed (Vt) d Equivalent airspeed (Ve) e Mach number (M) f Altitude (H) g Vertical speed (Hpr) h Maximum operating limit speed (Vmo) i True angle of attack (αt) j Free air temperature (Tfat) k Total temperature (Tt) These functions shall be derived from a central air data computer (AS 417) and through system wiring applied to the respective indicator.
Standard

PRESSURE ALTIMETER SYSTEM MINIMUM SAFE PERFORMANCE STANDARD

1996-09-01
CURRENT
AS942A
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.
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