Tech Library

Circular Circular Information Management (mlit.go.jp)

No.0-000: Circular system

[Summary]

JCAB’s Circulars are the notices, etc. issued by the relevant divisions of the Safety Department of the Civil Aviation Bureau of the Ministry of Land, Infrastructure, Transport and Tourism to clarify the procedures to be followed when an application, etc. is to be made under laws and regulations, the procedures to be followed to properly maintain and manage matters for which a license or approval has been granted, and other matters that the Aircraft Safety Division has deemed appropriate to make known and clearly indicated to all concerned parties. The numbering system is as follows.

[No.1-001]
No. 1 (→indicates the following classification)-001 (→indicates the continuation number)

1 … Procedures and policies for certification and approval of aircraft and equipment
2 … Procedures and policies pertaining to workplace certification
3 … Procedures and policies pertaining to maintenance in general
4 … Procedures and policies for air transport services and aircraft use services
5 … Procedures and policies pertaining to approval of operations
6 … Other general policies, etc.
7 … Various Tables

[Reference]

In contrast, the Advisory Circular (AC) issued by the FAA is a type of publication issued by the Federal Aviation Administration (FAA) that provides guidance for compliance with airworthiness regulations, pilot certification, operational standards, training standards, and other regulations within 14 CFR Aeronautics and Space Title. It provides guidance for compliance with airworthiness regulations, pilot certifications, operational standards, training standards, and other regulations within the 14 CFR Aeronautics and Space Title. In general, advisory circulars have no binding or regulatory force, but some have the effect of de facto standards or regulations.

No. 1-001: General Policy for the Inspection of Aircraft and Equipment

[Summary]

The following information is provided regarding the general policy, application procedures, and documents to be submitted for inspections of aircraft and equipment, including airworthiness certification.

Part I Relating to Airworthiness Certification: General policy and application procedures for airworthiness certification inspections, preparation of documents such as flight rules, etc. are stipulated.
Part II Relating to Type Certification: General policies, application procedures, documents to be submitted, etc., for type certification under Article 12 of the Law and for inspections of type design changes under Article 13 of the Law are specified.
The details of the services to be performed by those who have been accredited for the competence specified in Article 20, Paragraph 1, Item 1 of the Civil Aeronautics Act (i.e., accredited business units) are described in Circular No. 1-003 and Circular No. 2-001 “General Policy for Accreditation of Business Units”. Part III Additional Type Design
Part III Additional Type Design Approval: General policy, application procedures, and documents to be submitted for Additional Type Design Approval (STC) under Article 13-2 of the Act are stipulated.
Part IV Repair and Alteration Inspection: General policy, application procedures, and documents to be submitted for repair and alteration inspections under Article 17 of the Law are defined.
Part V Approval of Repair and Alteration Designs: General policy, application procedures, and documents to be submitted for approval of repair and alteration designs under Article 17-2 of the Act are defined.
Part VI Spare Parts Certification: General policies, procedures, and documents to be submitted for spare parts certification inspections and handling of imported equipment deemed to be spare parts certified in accordance with Article 18 of the Law.

The workflow for the above certifications/approvals is generally as follows.
See the Japanese version.

Circular No. 1-003: Type Certification of Domestic Aircraft

[Summary]

Part II “Type Certification and Type Design Modification”, Part III “Additional Type Design Approval and Additional Type Design Modification”, and Part V “Repair and Modification Design Approval and Repair and Modification Design Approval”, which are specified in Circular No. 1-001 and applicable to domestically produced aircraft. Part V “Repair and Modification Design Approval and Repair and Modification Design Modification”, which are applicable to Part II “Type Certification and Type Design Modification”, Part III “Additional Type Design Approval and Additional Type Design Modification”, and Part V “Repair and Modification Design Approval and Repair and Modification Design Modification”.
The workflow for the above certifications/approvals is generally as follows (Same as the workflow for Circular No. 1-001
(same as the workflow in Circular No. 1-001)
The Circular No. in which the details of the various tasks are described is as follows.
See the Japanese version.

Circular No. in which the details are described Title
1 1-301 Guideline for Implementation of Pre-coordination
2 1-302 Guideline for Application of Airworthiness Examination Procedures, etc.
3 1-303 Guideline for Handling Special Requirements, Equivalent Safety and Exemptions
4 1-304 Guideline for Handling Conformity Opinion
5 1-305 Guidelines for the Operation of Type Certification Examination Board
6 1-306 Guideline for Handling Flight Test Start Confirmation Letter
7 1-307 Conformity Certification Plan
8 1-308 Preparation and Management of Implementation Plan for Conformity Inspection and Test Witness
9 1-309 Implementation Guidelines for Conformity Inspection and Test Witness
10 1-310 Operational Procedure for Deviation Sheet
11 1-311 Implementation Guideline for Manufacturing Process Inspection
12 1-312 Quality Control Examination Policy for Manufacturing
13 1-313 Procedure for Establishment of “Airworthiness Limit” in “Instructions for Continued Airworthiness
14 1-314 Guideline for Preparation of Type Certification Data Sheet

Circular No. 1-004: General Policy for Type and Specification Approval of Equipment

[Outline]

The procedures for type and specification approval of equipment are described, and examples of equipment subject to type and specification approval are given. In addition, for testing to obtain type and specification approval of equipment, the application of tests such as RTCA DO-160 and DO-178 is recommended in the “Additional Requirements for Type and Specification Approval”.

Examples of parts subject to type approval

Engine
Propellers
Rotor blades
Transmission
Instruments
Other: starters, magnet generators, fuel pumps, propeller regulators, carburetors, high hydraulic pressure pumps, superchargers for pressurized rooms, combustors for ice protection, anti-icing liquid pumps, high pressure air pumps, vacuum pumps, inverters, legs, floats, skis, skids, etc.

Examples of parts subject to specification approval

Basic parts with special designs that are important in terms of function and strength
Parts with special design
Parts related to fuselage structure
Parts related to piston engine body
Parts related to turbine engine bodies
Parts related to propellers
Parts related to control and operation systems
Parts related to electrical and electronic systems
Instrument system related parts
Functional parts
Other parts requiring inspection by the authorities