ASTM F3120/F3120M-20

Standard Specification for Ice Protection for General Aviation Aircraft

ABSTRACT
This specification provides international standards for ice protection aspects of airworthiness and design for ”general aviation” aircraft. The applicant for a design approval must seek the individual guidance of their respective civil aviation authority (CAA) body concerning the use of this standard as part of a certification plan.
The standards cover: types of aircraft operational requirements; crew external visibility (windshields and windows); ice shedding (engine inlet ice ingestion, propeller ice shedding, airframe ice shedding, ice protection system failure considerations); engine installation and induction system ice protection (propellers, turbine engines in flight, turbine engines on ground).
Also addressed in this specification are instrumentation ice protection, flight into icing conditions, aircraft not approved for flight in icing, and atmospheric icing conditions.
SCOPE
1.1 This specification covers international standards for ice protection aspects of airworthiness and design for “general aviation” aircraft.  
1.2 The applicant for a design approval must seek the individual guidance of their respective civil aviation authority (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 Units—The values are stated in units common to the field of aircraft icing. Typically SI or inch-pound units are used, but in some cases this has resulted in the use of mixed units due to the historical development of these values. In cases where values are given in one system with the other system following in brackets, 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: Published
• Publication Date: 14-Aug-2020
• ICS: 49.045 - Structure and structure elements
• ICS: 49.100 - Ground service and maintenance equipment
• Technical Committee: F44 - General Aviation Aircraft
• Drafting Committee: F44.10 - General

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:F3120/F3120M −20
Standard Specification for
1
Ice Protection for General Aviation Aircraft
ThisstandardisissuedunderthefixeddesignationF3120/F3120M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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
2
2.1 ASTM Standards:
1.1 This specification covers international standards for ice
F3060 Terminology for Aircraft
protection aspects of airworthiness and design for “general
F3061/F3061M Specification for Systems and Equipment in
aviation” aircraft.
Small Aircraft
1.2 The applicant for a design approval must seek the
F3066/F3066M Specification forAircraft Powerplant Instal-
individual guidance of their respective civil aviation authority
lation Hazard Mitigation
(CAA) body concerning the use of this specification as part of
F3082/F3082M Specification for Weights and Centers of
a certification plan. For information on which CAAregulatory
Gravity of Aircraft
bodies have accepted this specification (in whole or in part) as
F3093/F3093M Specification for Aeroelasticity Require-
a means of compliance to their Small Aircraft Airworthiness
ments
regulations (hereinafter referred to as “the Rules”), refer to F3117/F3117M Specification for Crew Interface in Aircraft
ASTM F44 webpage (www.ASTM.org/COMMITTEE/
F3173/F3173M Specification for Aircraft Handling Charac-
F44.htm) which includes CAA website links. teristics
F3179/F3179M Specification for Performance of Aircraft
1.3 Units—The values are stated in units common to the
F3180/F3180M Specification for Low-Speed Flight Charac-
field of aircraft icing. Typically SI or inch-pound units are
teristics of Aircraft
used, but in some cases this has resulted in the use of mixed
F3230 Practice for Safety Assessment of Systems and
unitsduetothehistoricaldevelopmentofthesevalues.Incases
Equipment in Small Aircraft
where values are given in one system with the other system
F3231/F3231M Specification for Electrical Systems forAir-
following in brackets, the values stated in each system are not
craft with Combustion Engine Electrical Power Genera-
necessarilyexactequivalents;therefore,toensureconformance
tion
with the standard, each system shall be used independently of
F3316/F3316M Specification for Electrical Systems forAir-
the other, and values from the two systems shall not be
craft with Electric or Hybrid-Electric Propulsion
combined.
3
2.2 Federal Standards:
1.4 This standard does not purport to address all of the
14 CFR Part 23 (Amdt 62) Airworthiness Standards:
safety concerns, if any, associated with its use. It is the
Normal, Utility, Aerobatic, and Commuter Category Air-
responsibility of the user of this standard to establish appro-
craft
priate safety, health, and environmental practices and deter- 14CFRPart33(Amdt34) AirworthinessStandards:Aircraft
mine the applicability of regulatory limitations prior to use. Engines
14 CFR Part 33 Rule 68 Airworthiness Standards: Induction
1.5 This international standard was developed in accor-
System Icing
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
2.3 Other Standards:
Development of International Standards, Guides and Recom- EUROCAE ED-103 Minimum Operational Performance
mendations issued by the World Trade Organization Technical Standard for Inflight Icing Detection Systems
Barriers to Trade (TBT) Committee.
1 2
ThisspecificationisunderthejurisdictionofASTMCommitteeF44onGeneral For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Aviation Aircraft and is the direct responsibility of Subcommittee F44.10 on contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
General. Standards volume information, refer to the standards Document Summary page on
Current edition approved Aug. 15, 2020. Published September 2020. Originally the ASTM website.
3
approved in 2015. Last previous edition approved in 2019 as F3120/F3120M–19. Available from U.S. Government Publishing Office (GPO), 732 N. Capitol St.,
DOI: 10.1520/F3120_F3120M-20. NW, Washington, DC 20401, http://www.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F3120/F3120M−20
TABLE 1 Types of Aircraft Operational Requirements
FAAAC 25-28 Compliance ofTransport CategoryAirplanes
with Certification Requirements for Flight in Icing Con- Operational Requirements Req
...

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: F3120/F3120M − 19 F3120/F3120M − 20
Standard Specification for
1
Ice Protection for General Aviation Aircraft
This standard is issued under the fixed designation F3120/F3120M; 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 ice protection aspects of airworthiness and design for “general aviation”
aircraft.
1.2 The applicant for a design approval must seek the individual guidance of their respective CAA civil aviation authority (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 Units—The values are stated in units common to the field of aircraft icing. Typically SI or inch-pound units are used, but in
some cases this has resulted in the use of mixed units due to the historical development of these values. In cases where values are
given in one system with the other system following in brackets, 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. Combining
other, 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, 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
2.1 ASTM Standards:
F3060 Terminology for Aircraft
F3061/F3061M Specification for Systems and Equipment in Small Aircraft
F3066/F3066M Specification for Aircraft Powerplant Installation Hazard Mitigation
F3082/F3082M Specification for Weights and Centers of Gravity of Aircraft
F3093/F3093M Specification for Aeroelasticity Requirements
F3117/F3117M Specification for Crew Interface in Aircraft
F3173/F3173M Specification for Aircraft Handling Characteristics
1
This specification is under the jurisdiction of ASTM Committee F44 on General Aviation Aircraft and is the direct responsibility of Subcommittee F44.10 on General.
Current edition approved Nov. 1, 2019Aug. 15, 2020. Published December 2019September 2020. Originally approved in 2015. Last previous edition approved in 20152019
as F3120/F3120M–15.–19. DOI: 10.1520/F3120_F3120M–19.10.1520/F3120_F3120M-20.
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 standards 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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F3120/F3120M − 20
F3179/F3179M Specification for Performance of Aircraft
F3180/F3180M Specification for Low-Speed Flight Characteristics of Aircraft
F3230 Practice for Safety Assessment of Systems and Equipment in Small Aircraft
F3231/F3231M Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation
F3316/F3316M Specification for Electrical Systems for Aircraft with Electric or Hybrid-Electric Propulsion
3
2.2 Federal Standards:
14 CFR Part 23 (Amdt 62) Airworthiness Standards: Normal, Utility, Aerobatic, and Commuter Category Aircraft
14 CFR Part 33 (Amdt 34) Airworthiness Standards: Aircraft Engines
14 CFR Part 33 Rule 68 Airworthiness Standards: Induction System Icing
2.3 Other Standards:
EUROCAE ED-103 Minimum Operational Performance Standard for Inflight Icing Detection Systems
4
FAA AC
...