ASTM F3120/F3120M-15
(Specification)Standard Specification for Ice Protection for General Aviation Aircraft
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 CAA body concerning the use of this standard as part of a certification plan. For information on which CAA regulatory bodies have accepted this standard (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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Contact ASTM International (www.astm.org) for the latest information
Designation:F3120/F3120M −15
Standard Specification for
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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 F3066/F3066M Specification forAircraft Powerplant Instal-
lation Hazard Mitigation
1.1 This specification covers international standards for ice
F3093/F3093M Specification for Aeroelasticity Require-
protection aspects of airworthiness and design for “general
ments
aviation” aircraft.
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2.2 Federal Standards:
1.2 The applicant for a design approval must seek the
14CFRPart33(Amdt34) AirworthinessStandards:Aircraft
individual guidance of their respective CAA body concerning
Engines
the use of this standard as part of a certification plan. For
14 CFR Part 23 (Amdt 62) Airworthiness Standards:
information on which CAA regulatory bodies have accepted
Normal, Utility, Aerobatic, and Commuter Category Air-
this standard (in whole or in part) as a means of compliance to
craft
their Small Aircraft Airworthiness regulations (hereinafter
2.3 Other Standard:
referred to as “the Rules”), refer to ASTM F44 webpage
SAE AS5562 Ice and Rain Minimum Qualification Stan-
(www.ASTM.org/COMMITTEE/F44.htm) which includes
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dards for Pitot and Pitot-static Probes
CAA website links.
1.3 Units—The values are stated in units common to the
3. Terminology
field of aircraft icing. Typically SI or inch-pound units are
3.1 Refer to Terminology F3060 for definitions of terms in
used, but in some cases this has resulted in the use of mixed
this standard.
unitsduetothehistoricaldevelopmentofthesevalues.Incases
3.2 Acronyms:
where values are given in one system with the other system
3.2.1 ICTS—ice contaminated tailplane stall
following in brackets, the values stated in each system may not
be exact equivalents; therefore, each system shall be used
3.2.2 IPS—ice protection system
independently of the other. Combining values from the two
3.2.3 SLD—supercooled large droplets
systems may result in non-conformance with the standard.
3.2.4 TTO Probe—total temperature probe
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Applicability
responsibility of the user of this standard to establish appro-
4.1 Operational Requirements—The aircraft level of ap-
priate safety and health practices and determine the applica-
proval determines which portions of this specification are
bility of regulatory limitations prior to use.
applicable for a specific project. The requirements are defined
in Table 1.
2. Referenced Documents
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2.1 ASTM Standards:
5. Crew External Visibility
F3060 Terminology for Aircraft
5.1 Windshields and Windows—For aircraft approved for
F3061 Specification for Systems and Equipment in Small
flight in icing conditions, a means must be provided to prevent
Aircraft
or to clear accumulations of ice from the windshield on an area
sufficiently large to provide the view specified in 23.775(f).
This means must be designed to function in the icing condi-
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ThisspecificationisunderthejurisdictionofASTMCommitteeF44onGeneral
tions specified in Section 11 for which approval is sought.
Aviation Aircraft and is the direct responsibility of Subcommittee F44.10 on
General.
Current edition approved Dec. 1, 2015. Published January 2016. DOI: 10.1520/
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F3120_F3120M-15. Available from U.S. Government Printing Office, Superintendent of
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.access.gpo.gov.
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Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. PA 15096, http://aerospace.sae.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F3120/F3120M−15
TABLE 1 Types of Aircraft Operational Requirements
6.2.2 For aircraft approved for flight in icing conditions,
Operational Requirements Required Sections airframe ice accumulations must be representative of the icing
Aircraft is approved for VFR Sections 6.1.1, 6.2.1 and 10. conditions in Section 11 for which approval is sought. The ice
operations
accumulations must be consistent with the icing exposures
Aircraft is approved for IFR Sections 6.1.1, 6.2.1, 8.1, 8.2, 8.3
used for assessment of the aircraft performance and flight
operation
...
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