ASTM F3198-18 PDF

Full title and description

Standard Specification for Light Sport Aircraft Manufacturer’s Continued Operational Safety (COS) Program — ASTM F3198-18. This specification defines minimum requirements and processes for a Continued Operational Safety (COS) program for manufacturers of Light-Sport Aircraft (LSA) and LSA kits, including reporting, evaluation, corrective action, owner communication, and continuation of airworthiness.

Abstract

ASTM F3198-18 establishes procedures and program elements that LSA manufacturers should implement to detect, evaluate, and correct unsafe conditions and service difficulties discovered after delivery. The standard describes the COS program elements that support timely identification of safety issues, determination and documentation of corrective action, notification to owners/operators and civil aviation authorities when appropriate, and recordkeeping to support continuation of airworthiness.

General information

• Status: Original 2018 edition (F3198-18); superseded by ASTM F3198-25 (current edition published in 2025). The F3198-18 text remains useful as historical/reference material but users should consult the latest edition for current requirements.
• Publication date: Approved March 1, 2018; original 2018 edition published in 2018.
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 49.020 — Aircraft and space vehicles in general; Committee: F37 (Light Sport Aircraft).
• Edition / version: F3198-18 (2018 edition).
• Number of pages: 5 pages (concise specification).

Scope

F3198-18 applies to manufacturers of Light-Sport Aircraft and LSA kits and to those seeking civil aviation authority approval (e.g., flight certificates or permits) for LSA. The specification establishes minimum requirements for a manufacturer’s Continued Operational Safety (COS) program: how safety reports and service difficulty information are collected and assessed, how corrective actions are determined and documented, how notices of corrective action are issued and communicated to owners/operators and authorities, and how continuation of airworthiness is supported and documented.

Key topics and requirements

• Establishment of a formal COS program for LSA manufacturers and kit producers.
• Mechanisms for collecting and tracking safety reports, service difficulty reports, and other post‑delivery feedback.
• Process for evaluating reported conditions to determine risk and need for corrective action.
• Requirements for determining corrective actions, including engineering assessment and documentation of rationale.
• Procedures for issuing Notices of Corrective Action (service letters, service bulletins, safety directives) to owners/operators and for interacting with civil aviation authorities as required.
• Recordkeeping and traceability expectations to support continued airworthiness and regulatory review.
• Consideration of alternative means of compliance and the manufacturer’s response and documentation when alternatives are requested.
• Interaction with airworthiness directives or equivalent regulatory actions and procedures for assessing their effect on LSA products.

Typical use and users

Primary users are Light-Sport Aircraft manufacturers and kit producers establishing or maintaining COS programs. Secondary users include regulatory and certification authorities, designated representatives, type certification and airworthiness personnel, maintenance organizations, safety managers, quality assurance teams, and consultants who support LSA manufacturers in post‑delivery safety, reporting, and corrective‑action processes.

Related standards

Relevant and adjacent documents from ASTM Committee F37 (Light Sport Aircraft) and others include the later revision ASTM F3198-25 (superseding edition, 2025), standards and guides covering production acceptance, maintenance manual content, terminology for LSA (e.g., F3035, F2626 and related F37 documents), and historical COS/monitoring practices previously published under F2295 (withdrawn). Manufacturers should consult the current F37 suite for design, production, maintenance, and COS cross‑references.

Keywords

continued operational safety; COS; light-sport aircraft; LSA; service difficulty reporting; corrective action; owner notification; continuation of airworthiness; airworthiness directives; manufacturer safety program; F3198-18.

FAQ

Q: What is this standard?

A: ASTM F3198-18 is a concise specification that defines minimum requirements for a Continued Operational Safety (COS) program for manufacturers of Light-Sport Aircraft (LSA) and LSA kits.

Q: What does it cover?

A: It covers processes for collecting and evaluating post‑delivery safety information and service difficulties, determining and documenting corrective actions, communicating notices of corrective action to owners/operators and authorities, and maintaining records that support continuation of airworthiness.

Q: Who typically uses it?

A: LSA and kit manufacturers are the primary users. Regulators, designated airworthiness representatives, QA and maintenance organizations, and safety/engineering teams also use the specification to align COS practices and to assess manufacturer procedures.

Q: Is it current or superseded?

A: The F3198-18 text is the 2018 edition. It has been superseded by a later edition (ASTM F3198-25, published in 2025). For compliance and up‑to‑date program requirements, consult the current edition (F3198-25, published in 2025); F3198-18 may still be used for historical reference.

Q: Is it part of a series?

A: Yes. F3198 is part of the ASTM F37 suite of Light-Sport Aircraft standards and guidance documents. Related F37 standards address production acceptance, terminology, maintenance manual content, and other LSA design/airworthiness topics; manufacturers typically apply multiple F37 documents together to meet design, production, and COS requirements.

Q: What are the key keywords?

A: Continued Operational Safety (COS), LSA, light-sport aircraft, service difficulty reporting, corrective action, owner notification, continuation of airworthiness, safety directives, F3198-18.