Aircraft maintenance, design, production

Last updated 12 May 2026

Regulatory Requirement

Document	Current version	Date
Airworthiness Directives (opens in new tab)	0	1 Jul 2010
Airworthiness Notices (opens in new tab)	27	9 Feb 2022
Singapore Airworthiness Requirements (opens in new tab)	31	Effective from 1 Feb 2026
Singapore Airworthiness Requirements (SAR) Part 21 - Certification of Production and Articles and of Design and Production Organisations (opens in new tab)	11	1 July 2025
Singapore Airworthiness Requirements (SAR) Part 39 - Airworthiness Directives (opens in new tab)	3	3 Nov 2022
Singapore Airworthiness Requirements (SAR) Part 145 - Approved Maintenance Organisations (opens in new tab)	18	25 Jun 2021

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Advisory Circular - Design and production

Subject	Notice no.	Date
Certification, Design and Production of Articles fabricated by Additive Manufacturing (opens in new tab)	AC 21-7 (Rev 0)	26 May 2023
Guidance on Application of a CAAS Letter of Acceptance of Type Certificate (opens in new tab)	AC 21-6 (Rev 0)	19 May 2023
Working Arrangement between EASA and CAAS on Airworthiness Certification-Implementation Procedures (opens in new tab)	AC 21-5 (Rev 0)	24 Nov 2017
Test Witnessing and Conformity Inspection (opens in new tab)	AC 21-4 (Rev 0)	10 Mar 2017
Implementation Procedures for the Technical Arrangement for Airworthiness Certification Between CAAS and CASA (opens in new tab)	AC 21-3 (Rev 0)	8 May 2015
Responsibilities of Supplemental Type Certificate (STC) Holders (opens in new tab)	AC 21-2 (Rev 0)	16 May 2011
Approval Requirements for Modifications and Repairs (opens in new tab)	AC 21-1 (Rev 3)	16 Jan 2018

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Advisory Circular - Maintenance

Subject	Notice no.	Date
Calibration of Compass (opens in new tab)	AC SAR-2 (Rev 0)	28 Dec 2012
Application requirements for SAR-145 approval (opens in new tab)	AC 145-20 (Rev 0)	5 Feb 2026
Aircraft types in SAR-145 Approved Maintenance Organisation Scope of Work (opens in new tab)	AC 145-19 (Rev 3)	21 Jan 2026
Implementation Procedures for the TA-M between CAAS and CAANZ (opens in new tab)	AC 145-18 (Rev 1)	31 May 2024
Maintenance of Aircraft or Aircraft Components away from Approved Location(s) (opens in new tab)	AC 145-17 (Rev 0)	30 Jul 2021
Implementation Procedures for the Technical Arrangement on Aviation Maintenance between CAAS and CAAC (opens in new tab)	AC 145-16 (Rev 0)	17 Jun 2021
Implementation Procedures for the Technical Arrangement on Aviation Maintenance between CAAS and UKCAA (opens in new tab)	AC 145-15 (Rev 1)	1 Jan 2025
Schedule of Experience and On-the-Job Training Programme (opens in new tab)	AC 145-14 (Rev 0)	26 Nov 2020
Implementation Procedures for Technical Arrangement on Aviation Maintenance between CAAS and JCAB (opens in new tab)	AC 145-13 (Rev 1)	20 Jul 2022
Non-Destructive Testing - Testing, Qualification and Certification of Personnel (opens in new tab)	AC 145-12 (Rev 0)	13 Nov 2018
Safety Management System - Framework for the Establishment of Safety Performance Indictors for AMO (opens in new tab)	AC 145-11 (Rev 0)	01 Feb 2017
Implementation Procedures for the Technical Arrangement on Aviation Maintenance between CAAS and CASA (opens in new tab)	AC 145-10 (Rev 0)	05 Jul 2013
Extension of Quality System to Overseas Non SAR-145 Certificate Holder (opens in new tab)	AC 145-9 (Rev 0)	05 Oct 2012
Authorisation of Line Maintenance Certifying Staff (opens in new tab)	AC 145-8 (Rev 0)	03 Oct 2012
Requirement for Approval of Welders (opens in new tab)	AC 145-7 (Rev 0)	11 Aug 2010
Usage of Parts Removed from an Aircraft No Longer in Service and Disposal of Scrap Parts (opens in new tab)	AC 145-6 (Rev 0)	17 Jul 2008
Requirement for CAAS L12 Basic Paper for Workshop Certifying Staff and its Syllabus (opens in new tab)	AC 145-5 (Rev 0)	17 Jan 2005
Implementation Procedures for the Technical Arrangement on Aviation Maintenance Between CAAS and Hong Kong CAD (opens in new tab)	AC 145-4 (Rev 1)	17 Sep 2008
Acceptability of Aircraft Parts (opens in new tab)	AC 145-3 (Rev 11)	6 Mar 2026
Initial Qualification Requirements for Certifying Staff (opens in new tab)	AC 145-2 (Rev 4)	23 May 2019
Implementation Procedures for the Technical Arrangement on Aviation Maintenance between CAAS & TCCA (opens in new tab)	AC 145-1 (Rev 0)	10 Feb 2003

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