What exemptions are applicable to the Mode S EHS airborne equipment requirements?
In addition to the time scales permitted for aircraft retrofits, answered in the previous question, operators may apply to the Mode S Exemption Coordination Cell (ECC) for EHS exemptions in the following circumstances: – When the aircraft is not capable of providing the required DAPs. – When it is intended to withdraw an aircraft from service by 31 December 2007 – When flights are conducted for the purpose of flight testing, delivery and for transit into and out of maintenance bases. – When only occasional access to Mode S EHS designated airspace is required. ‘Occasional’ being an average total flying time of 30 hours annually per airframe.
