Crew member transition segment
155.—(1)  An AOC holder must ensure that every person, who is qualified and is on the AOC holder’s roster to be assigned duty as a crew member on a flight of a large aeroplane for a commercial air transport operation authorised by the AOC holder’s air operator certificate, completes the transition segment of the AOC holder’s training programme in accordance with the training programme required by regulation 143 if —
(a)the person is to be assigned crew member duty on an aeroplane type, or a variant of an aeroplane type, which is different from the aeroplane type or variant that the person is currently being assigned duty on; or
(b)the AOC holder is introducing a new procedure or new equipment on the aeroplane type or variant that the person is currently being assigned duty on.
(2)  The transition segment mentioned in paragraph (1) must address —
(a)the use of all safety and emergency equipment and procedures applicable to the aeroplane type or variant; and
(b)any new procedure or new equipment that is to be introduced on the aeroplane type or variant that the person is currently being assigned duty on.
(3)  To avoid doubt, any training that relates to a pilot’s aircraft type rating training must be conducted only by a training organisation that is approved in accordance with paragraph 20(13)(c) of the Air Navigation Order.
(4)  Unless otherwise approved by the Director‑General of Civil Aviation, a person who is on the AOC holder’s roster to be assigned duty as a cabin crew member for a flight of a large aeroplane must acquire the minimum operating experience specified in regulation 162 on the new aeroplane type before commencing duties on an aeroplane of the new aeroplane type.