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Standard

Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays

2020-04-01
CURRENT
AIR1093B
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

Maintenance of Pitot-Static Systems of Transport Aircraft

2020-02-20
CURRENT
AIR975B
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

RATE OF CLIMB INDICATOR, PRESSURE ACTUATED (VERTICAL SPEED INDICATOR)

2008-02-16
CURRENT
AS394A
This Aeronautical Standard covers four (4) basic types of direct indicating instruments as follows: TYPE I - Range 0-2000 feet per minute climb and descent TYPE II - Range 0-3000 feet per minute climb and descent TYPE III - Range 0-4000 feet per minute climb and descent TYPE IV - Range 0-6000 feet per minute climb and descent
Standard

Liquid Oxygen Quantity Instruments

2008-02-16
CURRENT
ARP433A
This Aeronautical Recommended Practice covers Liquid Oxygen Quantity Indicators for use with associated Liquid Oxygen converters.
Standard

Compass System Installations

2008-02-16
HISTORICAL
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

Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays

2008-02-16
HISTORICAL
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

LIQUID OXYGEN QUANTITY INSTRUMENTS

1991-05-01
HISTORICAL
ARP433
This Aeronautical Recommended Practice covers Liquid Oxygen Quantity Indicators for use with associated Liquid Oxygen converters.
Standard

COMPASS SYSTEM INSTALLATIONS

1991-05-01
HISTORICAL
ARP426
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

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

FIRE AND HEAT DETECTORS

1949-10-01
HISTORICAL
AS401A
This specification covers the following basic types of instruments, or combinations thereof, intended for use in protecting aircraft power plant installations, auxiliary power plants, combustion heaters and other installation where fuel, oil or similar fires may occur.
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