ASTM F2356-05a(2018)

Standard Specification for Production Acceptance Testing System for Lighter-Than-Air Light Sport Aircraft

ABSTRACT
This specification covers production acceptance test requirements for the manufacture of lighter-than-air light sport aircraft. This provides the minimum requirements for the establishment of a ground and flight test program for verifying the initial (first run) production aircraft meets certain operational performance requirement that have been set forth by the manufacturer in its Aircraft Operating Instructions. The minimum requirements to verify that each subsequent production aircraft has no obvious defects that would prevent the safe operation of the aircraft are described. Every production aircraft shall be flight tested to the minimums such as lighter-than-air airships, hot-air balloons and gas/hybrid balloons.
SCOPE
1.1 This specification covers production acceptance test requirements for the manufacture of lighter-than-air light sport aircraft.  
1.2 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.  
1.3 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: 31-Oct-2018
• ICS: 49.020 - Aircraft and space vehicles in general
• Technical Committee: F37 - Light Sport Aircraft
• Drafting Committee: F37.60 - Lighter than Air

Relations

• Replaces: ASTM F2356-05a(2013) - Standard Specification for Production Acceptance Testing System for Lighter-Than-Air Light Sport Aircraft
• Effective Date: 01-Nov-2018
• Referred By: ASTM F3060-20 - Standard Terminology for Aircraft
• Effective Date: 01-Nov-2018
• Referred By: ASTM F2355-14(2022) - Standard Specification for Design and Performance Requirements for Lighter-Than-Air Light Sport Aircraft
• Effective Date: 01-Nov-2018
• Referred By: ASTM F2563-16 - Standard Practice for Kit Assembly Instructions of Aircraft Intended Primarily for Recreation
• Effective Date: 01-Nov-2018

Overview

ASTM F2356-05a(2018) is the international standard specification that outlines the production acceptance testing system for lighter-than-air light sport aircraft. Published by ASTM International, this standard sets the minimum requirements for ground and flight testing to ensure that each manufactured aircraft meets operational performance requirements and is free of defects that could affect safe operation. The specification applies to a range of lighter-than-air craft, including airships, hot-air balloons, and gas or hybrid balloons, and is directly managed by ASTM Committee F37 on Light Sport Aircraft.

Key Topics

• Production Acceptance Test Requirements: Details the procedures for initial and subsequent aircraft, verifying conformity to the manufacturer's Aircraft Operating Instructions.
• Ground and Flight Testing Programs: Ensures robust systems are in place for ground and flight tests, mandatory for each unit.
  • Airships: Minimum of fifteen minutes of flight including takeoff, landing, trimming, and verification of control systems and instruments.
  • Hot-Air Balloons: Minimum fifteen-minute static inflation, with all vents, valves, burners, and suspension systems tested.
  • Gas/Hybrid Balloons: Pressurized inflation and operational testing of valves, controls, and suspension.
• Defect and Safety Evaluation: Each aircraft must be inspected thoroughly to identify any defects or issues that might compromise safety.
• Documentation Procedures: Written processes are required for recording and storing acceptance test results, all correlated to individual aircraft for traceability.
• Post-Flight Acceptance and Inspection: Mandatory written procedures and signed reviews to ensure that flight-critical attachments and structures meet safety standards.
• Engine and Instrument Verification: Includes procedures for engine break-in and ensuring all instruments function within accepted parameters.
• Handling Test Failures: Written protocols must guide failure review, rework, and retesting before an aircraft can be released.

Applications

ASTM F2356-05a(2018) plays a critical role in the aviation industry, particularly for manufacturers and operators of lighter-than-air light sport aircraft. Practical applications include:

• Aircraft Manufacturing: Assists manufacturers in implementing standardized, repeatable acceptance testing, reducing risks of operational failure and increasing overall safety.
• Type Certification and Special Airworthiness: Supports compliance with regulatory and airworthiness certification processes by documenting thorough testing and quality control steps.
• Quality Assurance and Traceability: Enables manufacturers and regulators to trace specific aircraft manufacturing and test records, enhancing post-production accountability and maintenance planning.
• Safety and Defect Prevention: Minimizes the likelihood of introducing aircraft with defects into active use, supporting a safer aviation environment for both operators and passengers.
• Operational Performance Verification: Confirms each aircraft's ability to meet operational performance as described in the official Aircraft Operating Instructions.

Related Standards

Organizations in the aviation sector and regulatory bodies may also reference these related standards:

• ASTM F2245 - Standard Specification for Design and Performance of Light Sport Aircraft
• ASTM F2564 - Standard Practice for Maintenance and Inspection of Lighter-Than-Air Aircraft
• ASTM F2295 - Standard Guide for Professional Practice for Lighter-Than-Air Flight Operations
• ASTM F2948 - Standard Guide for Flight Training and Proficiency of Lighter-Than-Air Pilots

Employing ASTM F2356-05a(2018) ensures a consistent approach to production acceptance testing for lighter-than-air sport aircraft, supporting international best practices and aligning with the WTO Technical Barriers to Trade (TBT) principles. This enhances safety, reliability, and regulatory compliance across the industry.

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: F2356 −05a (Reapproved 2018)
Standard Specification for
Production Acceptance Testing System for Lighter-Than-Air
Light Sport Aircraft
This standard is issued under the fixed designation F2356; 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 have been set forth by the manufacturer in its Aircraft
Operating Instructions.
1.1 This specification covers production acceptance test
3.2 In addition, this specification provides minimum re-
requirements for the manufacture of lighter-than-air light sport
aircraft. quirements to verify that each subsequent production aircraft
has no obvious defects that would prevent the safe operation of
1.2 This standard does not purport to address all of the
the aircraft.
safety concerns, if any, associated with its use. It is the
3.2.1 Every production aircraft shall be flight tested to the
responsibility of the user of this standard to establish appro-
following minimums:
priate safety, health, and environmental practices and deter-
3.2.1.1 Lighter-than-Air Airships—Fifteen minutes flight
mine the applicability of regulatory limitations prior to use.
time, including at least one takeoff and landing, trimming of
1.3 This international standard was developed in accor-
flight controls, and verification of control for left turn, right
dance with internationally recognized principles on standard-
turn, ballonet systems (if installed), vectoring systems (if
ization established in the Decision on Principles for the
installed), and instrument/indicator operation.
Development of International Standards, Guides and Recom-
3.2.1.2 Hot Air Balloons—Fifteen minute static inflation at
mendations issued by the World Trade Organization Technical
gross load/ambient temperature, including operational tests of
Barriers to Trade (TBT) Committee.
all vents, valves, burner operation, and suspension system.
3.2.1.3 Gas/Hybrid (Gas—Thermal Type) Balloons—Air
2. Terminology
pressurized inflation to manufacturer’s maximum in-flight
2.1 Definitions:
envelope pressure, including operational tests of all valves,
2.1.1 airship—engine-driven lighter-than-air aircraft that
controls, and so forth. Suspension systems will be static tested
can be steered.
by suspending at gross load to verify all suspension compo-
2.1.2 balloon—lighter-than-air aircraft that is not engine-
nents.
driven, and that sustains flight through the use of either gas
3.3 Post Flight Acceptance:
buoyancy or an airborne heater, or both.
3.3.1 There shall be a written procedure in effect to perform
2.1.3 lighter-than-air aircraft—aircraft that can rise and
post flight inspection that will review all flight critical attach-
remain suspended by using contained gas weighing less than
ments and structures.
the air that is displaced by the gas.
3.3.2 The reviewing personnel shall sign all post flight
2.1.3.1 Discussion—Airships may include dynamic lift that
review documents.
derive as much as 30 % lift from other than buoyancy.
3.4 Documentation—There shall be a written procedure in
effect to properly document and store the production accep-
3. Significance and Use
tance test results such that they are correlated to the specific
3.1
...