(b) where the applicant is the holder of an Aircraft Maintenance Engineer Licence, Category "A", or a Commercial Pilot or higher licence - aeroplane and has successfully completed the approved course of training, a minimum of 50 hours experience, under the supervision of a flight engineer or second officer, endorsed for the aircraft type, of which not more than 25 hours aircraft type simulator time acquired during an approved course of training shall be credited towards the total experience.