This order supports Federal Aviation Administration (FAA) Order 8000.369, Safety Management System, and establishes requirements for how to conduct Safety Risk Management (SRM) in the FAA. It formalizes SRM guidance for FAA Lines ofBusiness (LOBs) and Staff Offices, and describes specific steps when performing and documenting SRM. The FAA’s mission is to provide the safest, most efficient aerospace system in the world. In support ofthis mission, the FAA uses a Safety Management System (SMS) to integrate the management ofsafety risk into operations, acquisitions, rulemaking, and decision making. The SMS enhances the safety ofthe flying public and strengthens the FAA’s worldwide leadership in aviation safety. The SMS consists offour components: Safety Policy, SRM, Safety Assurance, and Safety Promotion. The objective ofSRM is to provide information regarding hazards, safety risk, and safety risk· controls/mitigations to decision makers and to enhance the FAA’s ability to address safety risk in the aerospace system. SRM consists of conducting a system analysis; identifying hazards; and analyzing, assessing, and controlling safety risk associated with the identified hazards. SRM as described in this order outlines standardized principles that enhance the FAA’s ability to coordinate risk-based decision making across organizations. Safety Policy and Safety Promotion are not addressed in this order, but are discussed in detail in FAA Order 8000.369, Safety Management System. However, Safety Assurance is described in this order due to its importance in triggering SRM through the identification ofpotential hazards or ineffective safety risk controls, as well as its role in monitoring safety risk controls. All four components work together to enable the FAA to manage safety within the aerospace system.

This advisory circular describes an acceptable means for showing compliance with the requirements of section 33.14 of the Federal Aviation Regulations (Title 14, Code of Federal Regulations). Section 33.14 contains requirements applicable to the design and life management of high energy rotating parts of aircraft gas turbine engines.

1. PURPOSE OF THIS ADVISORY CIRCULAR (AC). This AC provides guidance for the
development, qualification, and approval of bias and radial aircraft tire retreads, their repair and
process specifications, and the use of special nondestructive inspection (NDI) techniques.
This material is neither mandatory nor regulatory in nature and does not constitute a regulation.
It describes acceptable means, but not the only means, for developing specifications to be
submitted to the proper Federal Aviation Administration (FAA) office for approval. The FAA
will consider other methods of demonstrating compliance that an applicant may elect to present.
Terms such as “shall” and “must” are used only in the sense of ensuring applicability of this
particular method of compliance when the methods of compliance described in this document
are used.

2. PRINCIPAL CHANGES. This change updates references in paragraph 5; adds standard
information in paragraphs 2, 3, and 19; and updates paragraph numbers throughout the AC.

Purpose of This Order. This order grants certain authority to the Aircraft Certification Service (AIR) to manage technical policy and airworthiness projects for aircraft certification, including type, original airworthiness, and production certification programs.