ASTM F3233/F3233M-23a
(Specification)Standard Specification for Flight and Navigation Instrumentation in Aircraft
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. Annex A1 maps the means of compliance described in this specification to EASA CS 23, amendment 5 or later, and FAA 14 CFR 23, amendment 64 or later.
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
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Standards Content (Sample)
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.
Designation: F3233/F3233M − 23a
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 Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification covers flight and navigation instru-
Barriers to Trade (TBT) Committee.
mentation aspects of airworthiness and design. The material
was developed through open consensus of international experts
2. Referenced Documents
in general aviation. This information was created by focusing
2.1 Following is a list of external standards reference
on Level 1, 2, 3, and 4 Normal Category aeroplanes; however,
throughout this specification; the earliest revision acceptable
the content may be more broadly applicable, and should not be
for use is indicated. In all cases, later document revisions are
unduly limited. The topics covered within this specification are
acceptable if shown to be equivalent to the listed revision, or if
flight and navigation instruments including those for airspeed,
otherwise formally accepted by the governing civil aviation
altitude, attitude, heading, free air temperature, and speed
authority; earlier revisions are not acceptable.
warning.
2
2.2 ASTM Standards:
1.2 The applicant for a design approval shall seek the
F3060 Terminology for Aircraft
individual guidance of their respective CAA body concerning
F3061/F3061M Specification for Systems and Equipment in
the use of this specification as part of a certification plan. For
Aircraft
information on which CAA regulatory bodies have accepted
F3116/F3116M Specification for Design Loads and Condi-
this specification (in whole or in part) as a means of compli-
tions
ance to their Small Aircraft Airworthiness regulations (herein-
F3117/F3117M Specification for Crew Interface in Aircraft
after referred to as “the Rules”), refer to ASTM F44 webpage
F3120/F3120M Specification for Ice Protection for General
(www.ASTM.org/COMMITTEE/F44.htm), which includes
Aviation Aircraft
CAA website links. Annex A1 maps the means of compliance
F3174/F3174M Specification for Establishing Operating
described in this specification to EASA CS 23, amendment 5 or
Limitations and Information for Aeroplanes
later, and FAA 14 CFR 23, amendment 64 or later.
F3229/F3229M Practice for Static Pressure System Tests in
1.3 The values stated in either SI units or inch-pound units
Small Aircraft
are to be regarded separately as standard. The values stated in
F3230 Practice for Safety Assessment of Systems and
each system are not necessarily exact equivalents; therefore, to
Equipment in Small Aircraft
ensure conformance with the standard, each system shall be 3
2.3 CARs Standard:
used independently of the other, and values from the two
CAR 523 Normal, utility, aerobatic and commuter category
systems shall not be combined.
aeroplanes and Airworthiness manual chapter 523 –
1.4 This standard does not purport to address all of the
Normal, utility, aerobatic and commuter category aero-
safety concerns, if any, associated with its use. It is the
planes
4
responsibility of the user of this standard to establish appro-
2.4 EASA Standard:
priate safety, health, and environmental practices and deter-
CS-23 Certification Specifications for Normal-Category
mine the applicability of regulatory limitations prior to use.
Aeroplanes
1.5 This international standard was developed in accor-
2.5 FAA Technical Standard Orders:
dance with internationally recognized principles on standard-
TSO-C10 Pressure Altimeter Systems
ization established in the Decision on Principles for the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This specification is under the jurisdiction of ASTM Committee F44 on General Standards volume information, refer to the standard’s Document Summary page on
Aviation Aircraft and is the direct responsibility of Subcommittee F44.50 on the ASTM website.
3
Systems and Equipment. Available from Transport Canada, 330 Sparks St., Ottawa, ON K1A 0N5,
Current edition approved Nov. 1, 2023. Published December 2023. Originally https://tc.canada.ca/en.
4
approved in 2017. Last previous edition approved in 2023 as F3233/F3233M–23. Available from European Union Aviation Safety Agency (EAS
...
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 − 23 F3233/F3233M − 23a
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
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. Annex A1 maps the
means of compliance described in this specification to EASA CS 23, amendment 5 or later, and FAA 14 CFR 23, amendment 64
or later.
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.
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 June 1, 2023Nov. 1, 2023. Published July 2023December 2023. Originally approved in 2017. Last previous edition approved in 20212023 as
F3233/F3233M–21. DOI: 10.1520/F3233_F3233M-23.–23. DOI: 10.1520/F3233_F3233M-23A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’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 − 23a
F3060 Terminology for Aircraft
F3061/F3061M Specification for Systems and Equipment in Aircraft
F3116/F3116M Specification for Design Loads and Conditions
F3117/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 Assessment of Systems and Equipment in Small Aircraft
3
2.3 CARs Standard:
CAR 523 Normal, utility, aerobatic and commuter category aeroplanes and
...
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