Operations & Airworthiness

Welcome to Flight Operations and Aircraft Airworthiness






This site brings together the expertise of a number of departments within the CAA and provides useful links to other organisations where appropriate.


The aim of this site is to provide a complete picture regarding the certification, operation and maintenance of aircraft and to highlight important safety issues.

The areas listed below include application information and relevant guidance material.

Information may be accessed via the menu bar or index.

If you cannot find what you are looking for, the website map may help. 

Acronyms and Abbreviations

Holding your mouse over selected acronyms and abbreviations throughout the site will display their meanings.

CAA Whistleblowing Statement

The CAA is a “prescribed person” under the Public Interest Disclosure Act 1998 for the purpose of receiving “protected disclosures” (whistleblowing) from the civil aviation industry.  As such, the CAA is directly responsible for investigating any information of this nature that is received. 

Read the CAA Whistleblowing Statement in full.


The rules and regulations with which the aviation industry must comply.







Application forms for all airworthiness and operational requirements.

Formal publications relevant to all aspects of Flight Operations and Aircraft Airworthiness.

Contact information for all of the relevant departments within the CAA, Regional Offices and other organisations.

A comprehensive Operations and Airworthiness site index.


Some webpages can be accessed using shortcuts. A complete list of these shortcuts is available, but some operations and airworthiness ones are:


 Air Operator Certificates (AOCs) http://www.caa.co.uk/aocholders
 Airworthiness Directives (ADs) http://www.caa.co.uk/ads
 Airworthiness of Civil Aircraft http://www.caa.co.uk/airworthiness
 Approved Organisations http://www.caa.co.uk/UKAO
 Dangerous Goods http://www.caa.co.uk/dangerousgoods
 Flight Operations http://www.caa.co.uk/flightoperations
 General Aviation (GA) http://www.caa.co.uk/ga
 Master Minimum Equipment Lists (MMELs) http://www.caa.co.uk/mmellist
 MMEL Policy Items http://www.caa.co.uk/mmelpolicy
 Safety Management Systems (SMS) http://www.caa.co.uk/sms
 Type Certificate Data Sheets (TCDS) http://www.caa.co.uk/tcds
 Types of Operation http://www.caa.co.uk/operationtypes