FAQ n.19105

Can a certification maintenance requirement (CMR) be performed by the Flight Crew before flight?


145.A.30(j)(3) is usually not applicable in case the CMRs included in an AD but it is not a “repetitive pre-flight airworthiness directive”,

145.A.30(j)(4) could be used for CMRs as long as all the applicable conditions are met. In particular:

  • The aircraft is away from a supported location.
  • Sufficient practical training has been carried out.
  • There is a procedure in the Maintenance Organisation Exposition.
  • The conditions of AMC 145.A.30(j)(4) are met (of other agreed with the competent authority which are consistent with this AMC). Please refer, in particular, to:
    • the point 2(i) where it says “minor maintenance or simple checks, and
    • the point 2((i)e of this AMC, which states “Any check/replacement involving simple techniques consistent with this AMC and as agreed by the competent authority”

 As a consequence, the competent authority should assess that the test is simple and that all the other conditions mentioned in 145.A.30(j)(4) and associated AMC/GMs are met.

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