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Parts and Components A-4 Aircraft Instruments Committee Hydraulic systems

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Standard

Air Data Computers, MPS
2008-02-16
CURRENT
AS417A
This Standard covers air data equipment (hereinafter designated the instrument) which when connected to sources of aircraft electrical power, static pressure, total pressure and outside air temperature (singly or in combination) provides some or all of the following computed air data output signals: Pressure Altitude* Total Temperature* Pressure Altitude (Reporting) Altitude Rate Baro-Corrected Pressure Altitude* Overspeed Warning Vertical Speed* Altitude Hold Computed Airspeed* Airspeed Hold Mach Number* Mach Hold Maximum Allowable Airspeed* qc (impact pressure) Static Air Temperature (*when used as an alternate for total temperature) True Airspeed Others
Standard

Automatic Pilot Installations
2020-04-14
CURRENT
ARP419B
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

Remote Servoed Air Data Instruments for Subsonic Aircraft
2008-02-16
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

MAINTENANCE OF PITOT-STATIC SYSTEMS OF TRANSPORT AIRCRAFT
1984-10-01
HISTORICAL
AIR975
In efforts to increase the accuracy and reliability of altimetry, speed measurement and other aspects of air data, a great deal of attention and money have been expended on new and refined pressure transducing and computing systems and on the standards by which they are calibrated. So much progress has been made in this that the limiting factor is, or may soon be, the sensing and transmitting in the aircraft of the pressures to be transduced. Until the appearance of References 1-13 and 18 there was little guidance available on the maintenance of pitot and static systems. This report presents what information is available, suggests limits, and lists the principal original papers on the subject.
Standard

MAINTENANCE OF PITOT-STATIC SYSTEMS OF TRANSPORT AIRCRAFT
1996-09-01
HISTORICAL
AIR975A
In efforts to increase the accuracy and reliability of altimetry, speed measurement and other aspects of air data, a great deal of attention and money have been expended on new and refined pressure transducing and computing systems and on the standards by which they are calibrated. So much progress has been made in this that the limiting factor is, or may soon be, the sensing and transmitting in the aircraft of the pressures to be transduced. Until the appearance of References 1-13 and 18 there was little guidance available on the maintenance of pitot and static systems. This report presents what information is available, suggests limits, and lists the principal original papers on the subject.
Standard

SYNCHROS
2008-02-16
CURRENT
ARP461B
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros:
Standard

SYNCHROS
1959-11-15
HISTORICAL
ARP461A
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros:
Standard

Synchros
1955-07-01
HISTORICAL
ARP461
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros: 26 volt, 400 cycle synchros 115 volt, 400 cycle synchros 115 volt, 60 cycle synchros
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

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

MINIMUM PERFORMANCE STANDARD FOR BANK & PITCH INSTRUMENTS
2008-02-16
CURRENT
AS8001
This Standard covers Bank and Pitch Instruments which measure and display the angular displacement of bank and pitch from a gyroscopic vertical reference. This reference may be pneumatically or electrically driven and be contained within the instrument display case or located remotely. Unless otherwise specified, whenever the term "Instrument" is used, it is to be understood to be the complete system of gyro component, any auxiliary equipment and display.
Standard

Compass; Magnetic, Pilot's Standby
2012-08-22
CURRENT
AS5604A
This specification covers the design requirements and all performance requirements for procurement of 1 7/8 inch dial pilot’s standby compasses as specified herein.
Standard

Compass; Magnetic, Pilot’s Standby
1999-04-01
HISTORICAL
AS5604
This specification covers the design requirements and all performance requirements for procurement of 1 7/8 inch dial pilot’s standby compasses as specified herein.
Standard

Compass System Installations
2020-04-14
CURRENT
ARP426B
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

FLIGHT DIRECTOR EQUIPMENT
1991-05-01
HISTORICAL
AS8008
This Aerospace Standard covers Flight Director Equipments which display to the pilot a computed command for the operation of an aircraft in accordance with selected Mode(s). The term “Equipment” may include controls, displays, computers, etc. and may include sensors if furnished as a part of the Flight Director.
Standard

Flight Director Equipment
2020-12-22
CURRENT
AS8008A
This Aerospace Standard covers Flight Director Equipments which display to the pilot a computed command for the operation of an aircraft in accordance with selected Mode(s). The term “Equipment” may include controls, displays, computers, etc. and may include sensors if furnished as a part of the Flight Director.
Standard

AIRSPEED INSTRUMENTS
1987-05-01
HISTORICAL
AS8019
This standard covers Airspeed Instruments which display airspeed of an aircraft, as follows:
Standard

MINIMUM PERFORMANCE STANDARD FOR MACH METERS
1978-10-01
HISTORICAL
AS8018
This AS covers subsonic and supersonic Mach Meter instruments which, when connected to sources of static (Ps), and total (Pt), or impact (Pt-Ps), pressure provide indication of Mach number. These instruments are known as Type A. This AS also covers servo-operated repeater or digital display instruments which indicate Mach number when connected to the appropriate electrical output of a Mach transducer of Air Data Computer. These instruments are known as Type B.
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