Regulatory Article (RA) 4820: continued validity (MRP 145.A.90), approved maintenance organisations (AMOs) only

RA covering duration, surrender, suspension, or revocation of an AMO approval.



The purpose of Regulatory Articles (RA) is to provide the framework of policy, rules, directives, standards, processes and the associated direction, advice and guidance, which governs military aviation activity and against which air safety is assessed. The regulator develops regulations in response to applicable UK law, MOD needs, legal changes and recommendations resulting from both assurance or investigation functions.

Published 27 November 2014
Last updated 15 May 2015 + show all updates
  1. Issue 5 has been published under NAA 15/22
  2. First published.