ASTM F3233/F3233M-21

Standard Specification for Flight and Navigation Instrumentation in Aircraft

ABSTRACT
This specification establishes the requirements for the instrumentation aspects of airworthiness and design for ”small” aircraft. It prescribes the Aircraft Type Code (ATC) compliance matrix based on airworthiness level, number of engines, type of engine(s), stall speed, cruise speed, meteorological conditions, altitude, and maneuvers. An ATC is defined by taking into account both the technical considerations regarding the design of the aircraft and the airworthiness level established based upon risk-based criteria. The instrumentation requirements established by this specification cover flight and navigation instruments, electronic display instrument systems, airspeed indicating system, static pressure system, magnetic direction indicator, and instruments using a power source.
SCOPE
1.1 This specification covers flight and navigation instrumentation aspects of airworthiness and design. The material was developed through open consensus of international experts in general aviation. This information was created by focusing on Level 1, 2, 3, and 4 Normal Category aeroplanes; however, the content may be more broadly applicable, and should not be unduly limited. The topics covered within this specification are flight and navigation instruments including those for airspeed, altitude, attitude, heading, free air temperature, and speed warning.  
1.2 The applicant for a design approval shall seek the individual guidance of their respective CAA body concerning the use of this specification as part of a certification plan. For information on which CAA regulatory bodies have accepted this specification (in whole or in part) as a means of compliance to their Small Aircraft Airworthiness regulations (hereinafter referred to as “the Rules”), refer to ASTM F44 webpage (www.ASTM.org/COMMITTEE/F44.htm), which includes CAA website links.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 14-Feb-2021
• ICS: 49.020 - Aircraft and space vehicles in general
• Technical Committee: F44 - General Aviation Aircraft
• Drafting Committee: F44.50 - Systems and Equipment

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F3233/F3233M − 21
Standard Specification for
1
Flight and Navigation Instrumentation in Aircraft
This standard is issued under the fixed designation F3233/F3233M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This specification covers flight and navigation instru- 2.1 Following is a list of external standards reference
mentation aspects of airworthiness and design. The material throughout this specification; the earliest revision acceptable
was developed through open consensus of international experts for use is indicated. In all cases, later document revisions are
in general aviation. This information was created by focusing acceptable if shown to be equivalent to the listed revision, or if
on Level 1, 2, 3, and 4 Normal Category aeroplanes; however, otherwise formally accepted by the governing civil aviation
the content may be more broadly applicable, and should not be authority; earlier revisions are not acceptable.
unduly limited. The topics covered within this specification are 2
2.2 ASTM Standards:
flight and navigation instruments including those for airspeed,
F3060 Terminology for Aircraft
altitude, attitude, heading, free air temperature, and speed
F3061/F3061M Specification for Systems and Equipment in
warning.
Small Aircraft
1.2 The applicant for a design approval shall seek the F3116/F3116M Specification for Design Loads and Condi-
individual guidance of their respective CAA body concerning tions
the use of this specification as part of a certification plan. For F3117/F3117M Specification for Crew Interface in Aircraft
information on which CAA regulatory bodies have accepted F3120/F3120M Specification for Ice Protection for General
this specification (in whole or in part) as a means of compli- Aviation Aircraft
ance to their Small Aircraft Airworthiness regulations (herein- F3174/F3174M Specification for Establishing Operating
after referred to as “the Rules”), refer to ASTM F44 webpage Limitations and Information for Aeroplanes
(www.ASTM.org/COMMITTEE/F44.htm), which includes F3229/F3229M Practice for Static Pressure System Tests in
CAA website links. Small Aircraft
F3230 Practice for Safety Assessment of Systems and
1.3 The values stated in either SI units or inch-pound units
Equipment in Small Aircraft
are to be regarded separately as standard. The values stated in
2.3 FAA Technical Standard Orders:
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be TSO-C10 Pressure Altimeter Systems
TSO-C209 Electronic Flight Instrument System (EFIS) Dis-
used independently of the other, and values from the two
systems shall not be combined. play
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.1 Terminology specific to this specification is provided
priate safety, health, and environmental practices and deter-
below. For general terminology, refer to Terminology F3060.
mine the applicability of regulatory limitations prior to use.
3.2 Definitions:
1.5 This international standard was developed in accor-
3.2.1 aircraft type code, n—an Aircraft Type Code (ATC) is
dance with internationally recognized principles on standard-
defined by considering both the technical considerations re-
ization established in the Decision on Principles for the
garding the design of the aircraft and the airworthiness level
Development of International Standards, Guides and Recom-
established based upon risk-based criteria; the method of
mendations issued by the World Trade Organization Technical
defining an ATC applicable to this specification is defined in
Barriers to Trade (TBT) Committee.
Specification F3061/F3061M.
1
This specification is under the jurisdiction of ASTM Committee F44 on General
Aviation Aircraft and is the direct responsibility of Subcommittee F44.50 on
2
Systems and Equipment. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 15, 2021. Published March 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2017. Last previous edition approved in 2017 as F3233/F3233M–17. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F3233_F3233M-21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F3233/F3233M − 17 F3233/F3233M − 21
Standard Specification for
1
Flight and Navigation Instrumentation in Small Aircraft
This standard is issued under the fixed designation F3233/F3233M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers international standards for the flight and navigation instrumentation aspects of airworthiness and
design for “small” aircraft.design. The material was developed through open consensus of international experts in general aviation.
This information was created by focusing on Level 1, 2, 3, and 4 Normal Category aeroplanes; however, the content may be more
broadly applicable, and should not be unduly limited. The topics covered within this specification are flight and navigation
instruments including those for airspeed, altitude, attitude, heading, free air temperature, and speed warning.
1.2 The applicant for a design approval mustshall seek the individual guidance of their respective CAA body concerning the use
of this specification as part of a certification plan. For information on which CAA regulatory bodies have accepted this specification
(in whole or in part) as a means of compliance to their Small Aircraft Airworthiness regulations (hereinafter referred to as “the
Rules”), refer to ASTM F44 webpage (www.ASTM.org/COMMITTEE/F44.htm)(www.ASTM.org/COMMITTEE/F44.htm),
which includes CAA website links.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 Following is a list of external standards reference throughout this specification; the earliest revision acceptable for use is
indicated. In all cases, later document revisions are acceptable if shown to be equivalent to the listed revision, or if otherwise
formally accepted by the governing civil aviation authority; earlier revisions are not acceptable.
2
2.2 ASTM Standards:
1
This specification is under the jurisdiction of ASTM Committee F44 on General Aviation Aircraft and is the direct responsibility of Subcommittee F44.50 on Systems
and Equipment.
Current edition approved Feb. 15, 2017Feb. 15, 2021. Published March 2017March 2021. Originally approved in 2017. Last previous edition approved in 2017 as
F3233/F3233M–17. DOI: 10.1520/F3233_F3233M-17.10.1520/F3233_F3233M-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F3233/F3233M − 21
F3060 Terminology for Aircraft
F3061/F3061M Specification for Systems and Equipment in Small Aircraft
F3082/F3082M Specification for Weights and Centers of Gravity of Aircraft
F3116/F3116M Specification for Design Loads and Conditions
F3117F3117/F3117M Specification for Crew Interface in Aircraft
F3120/F3120M Specification for Ice Protection for General Aviation Aircraft
F3174/F3174M Specification for Establishing Operating Limitations and Information for Aeroplanes
F3229/F3229M Practice for Static Pressure System Tests in Small Aircraft
F3230 Practice for Safety AssessmentsAssessment of Systems a
...