ASTM F3396/F3396M-20

Standard Practice for Aircraft Simplified Loads Criteria

SIGNIFICANCE AND USE
4.1 This practice provides one means for determining the aeroplane structural loads for flight, control surfaces, and control systems. This practice satisfies the simplified loads requirements set forth in Specification F3116 for Normal Category Aeroplanes.
SCOPE
1.1 This practice provides an acceptable means of meeting the airworthiness requirements for the flight design loads and conditions of small normal category level 1 and 2 aeroplanes. The material was developed through open consensus of international experts in general aviation. This information was created by focusing on Normal Category aeroplanes. The content may be more broadly applicable; it is the responsibility of the applicant to substantiate broader applicability as a specific means of compliance. The topics covered within this practice are: Simplified Design Load Criteria, Acceptable Methods for Control Surface Loads Calculations, Acceptable Methods for Primary Control System Loads Calculations, and Control Surface Loading (Level 1 Aeroplanes).  
1.2 This practice is applicable to normal category, low-speed, level 1 and 2 aeroplanes. Use of the term aeroplane used throughout this practice will mean “normal category, low-speed, level 1 or 2 aeroplane,” unless otherwise stated.  
1.3 An applicant intending to propose this information as means of compliance for a design approval must seek guidance from their respective oversight authority (for example, published guidance from applicable CAAs) concerning the acceptable use and application thereof. For information on which oversight authorities have accepted this standard (in whole or in part) as an acceptable means of compliance to their regulatory requirements (hereinafter “the Rules”), refer to the ASTM Committee F44 web page (www.astm.org/COMMITTEE/F44.htm).  
1.4 This document may present information in either SI units, English Engineering units, or both. 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.  
1.5 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.  
1.6 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: 31-Oct-2020
• ICS: 49.020 - Aircraft and space vehicles in general
• Technical Committee: F44 - General Aviation Aircraft
• Drafting Committee: F44.30 - Structures

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: F3396/F3396M − 20
Standard Practice for
1
Aircraft Simplified Loads Criteria
This standard is issued under the fixed designation F3396/F3396M; 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 priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This practice provides an acceptable means of meeting
1.6 This international standard was developed in accor-
the airworthiness requirements for the flight design loads and
dance with internationally recognized principles on standard-
conditions of small normal category level 1 and 2 aeroplanes.
ization established in the Decision on Principles for the
The material was developed through open consensus of inter-
Development of International Standards, Guides and Recom-
national experts in general aviation. This information was
mendations issued by the World Trade Organization Technical
created by focusing on Normal Category aeroplanes. The
Barriers to Trade (TBT) Committee.
content may be more broadly applicable; it is the responsibility
of the applicant to substantiate broader applicability as a
2. Referenced Documents
specific means of compliance. The topics covered within this
2
2.1 ASTM Standards:
practice are: Simplified Design Load Criteria, Acceptable
F3060 Terminology for Aircraft
Methods for Control Surface Loads Calculations, Acceptable
F3116 Specification for Design Loads and Conditions
Methods for Primary Control System Loads Calculations, and
3
2.2 U.S. Code of Federal Regulations:
Control Surface Loading (Level 1 Aeroplanes).
14 CFR Part 23 Airworthiness Standards: Normal, Utility,
1.2 This practice is applicable to normal category, low-
Aerobatic and Commuter Category Airplanes (Amend-
speed, level 1 and 2 aeroplanes. Use of the term aeroplane used
ment 62)
throughout this practice will mean “normal category, low-
4
2.3 European Aviation Safety Agency (EASA) Regulations:
speed, level 1 or 2 aeroplane,” unless otherwise stated.
CS-23, Amendment 4 Certification Specifications for
1.3 An applicant intending to propose this information as
Normal, Utility, Aerobatic, and Commuter Category Aero-
means of compliance for a design approval must seek guidance
planes
from their respective oversight authority (for example, pub-
CS-VLA, Amendment 1 Certification Specifications for Very
lished guidance from applicable CAAs) concerning the accept-
Light Aeroplanes
able use and application thereof. For information on which
oversight authorities have accepted this standard (in whole or
3. Terminology
in part) as an acceptable means of compliance to their
3.1 A listing of terms, abbreviations, acronyms, and sym-
regulatory requirements (hereinafter “the Rules”), refer to the
bols related to aircraft covered by ASTM Committees F37 and
ASTM Committee F44 web page (www.astm.org/
F44 airworthiness design standards can be found in Terminol-
COMMITTEE/F44.htm).
ogy F3060. Items listed below are more specific to this
1.4 This document may present information in either SI
standard.
units, English Engineering units, or both. The values stated in
3.2 Definitions of Terms Specific to This Standard:
each system are not necessarily exact equivalents; therefore, to
3.2.1 chordwise, n—directed, moving, or placed along the
ensure conformance with the standard, each system shall be
chord of an airfoil section.
used independently of the other, and values from the two
3.2.2 downwash, n—the downward deflection of an air-
systems shall not be combined.
stream by an aircraft wing.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
2
responsibility of the user of this standard to establish appro-
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’s Document Summary page on
1
This practice is under the jurisdiction of ASTM Committee F44 on General the ASTM website.
3
Aviation Aircraft and is the direct responsibility of Subcommittee F44.30 on Available from U.S. Government Publishing Office (GPO), 732 N. Capitol St.,
Structures. NW, Washington, DC 20401, http://www.gpo.gov.
4
Current edition approved Nov. 1, 2020. Published December 2020. DOI: Available from the European Aviation Safety Agency (EASA), Postfach 10 12
10.1520/F3396_F3396M-20. 53, D-50452 Koeln, Germany, https://www.easa.europa.eu/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
...