IFR Flight Plans

The pilot-in-command of an aircraft for which an IFR flight plan or an IFR flight itinerary has been filed shall notify ATC or the responsible person where the pilot-in-command intends to make any change in the plan or itinerary in respect of:

  • The cruising altitude or cruising flight level
  •  The route of flight
  • The destination aerodrome
  • In the case of a flight plan, the true airspeed at the cruising altitude or cruising flight level, where the change intended is five per cent or more of the true airspeed specified in the IFR flight plan
  • The Mach number, where the change intended is 0.01 or more of the Mach number that has been included in the air traffic control clearance.The destination aerodrome

If operating in controlled airspace an IFR aircraft will also require a new clearance 

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