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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.



This page offers guidance to appropriately approved organisations when extending Airworthiness Review Certificate (ARC) for UK registered Part 21 aircraft.

ARC first and second extensions can be carried out by the following appropriately approved organisations, subject to the aircraft being in a ‘Controlled Environment’:

  • Part-CAMO Organisations with the privilege to issue or extend an ARC.
  • Part-CAO Organisations with the privilege to issue or extend an ARC.

How do I apply?



You will need to use your allocated password to log on to ARC online. The Airworthiness Review Certificate (ARC) can be extended using this system and a new ARC printed out.

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How much does it cost?



The fee for extending the Airworthiness Review Certificate (ARC) depends on several factors, including whether the aircraft is being operated on an Air Operator Certificate (AOC), and the aircraft maximum take-off mass. The fee will automatically be calculated by the ARC Online system.

The Official Record Series 5, CAA Scheme of Charges (Airworthiness, Noise Certification and Aircraft and Aircraft Engine Emissions) provides further details.

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What do I need to send with my application?



Following extension of the Airworthiness Review Certificate (ARC), you are required to send a signed copy to apply@caa.co.uk within 10 days of the extension.

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What else do I need to know?



An aircraft in a ‘Controlled Environment’ is an aircraft which, during the preceding 12 months has had its airworthiness continuously managed by a unique CAMO or CAO.

All maintenance carried out on the aircraft must have been performed by appropriately approved maintenance organisations or the pilot / owner as appropriate, in accordance with Part M.

UK Regulation (EU) No 1321/2014 and the associated Acceptable Means of Compliance and Guidance Material provides further information on the requirements applicable to the extension of Airworthiness Review Certificates (ARCs).

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How long is it valid for?



Following extension of an Airworthiness Review Certificate (ARC), it is normally valid for 12 months from the date expiry. But, this is conditional on the ARC being extended within 30 days of its expiry.

UK Regulation (EU) No 1321/2014 and the associated Acceptable Means of Compliance and Guidance Material provide further information on the specific conditions applicable to the extension of ARCs.

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