Article 34 Use of flight recording systems and preservation of records
On any flight on which a flight data recorder, a cockpit voice recorder or a combined cockpit voice recorder/flight data recorder is required by paragraph 5(7) of Schedule 3 to be carried in an aeroplane, it shall always be in use from the beginning of the take-off run to the end of the landing run.
The operator of the aeroplane shall at all times, subject to article 52, preserve—
the last 25 hours of recording made by any flight data recorder required by or under this Order to be carried in an aeroplane; and
a record of not less than one representative flight, that is to say, a recording of a flight made within the last 12 months which includes a take-off, climb, cruise, descent, approach to landing and landing, together with a means of identifying the record with the flight to which it relates;
and shall preserve such records for such period as the Department may in a particular case direct.
On any flight on which a cockpit voice recorder, a flight data recorder or a combined cockpit voice recorder/flight data recorder is required by paragraph 5(6) of Schedule 3 to be carried in a helicopter, it shall always be in use from the time the rotors first turn for the purpose of taking off until the rotors are next stopped.
The operator of a helicopter shall at all times, subject to article 52, preserve, in the case of a combined cockpit voice recorder/flight data recorder specified in paragraph (3) of Scale SS of paragraph 6 of Schedule 3 and required by or under this Order to be carried in the helicopter, either—
the last 8 hours of recording; or
the last 5 hours of recording or the duration of the last flight, whichever is the greater, together with an additional period of recording for either—
the period immediately preceding the last five hours of recording or the duration of the last flight, whichever is the greater; or
such period or periods as the Department may permit in any particular case or class of cases or generally.
The additional recording retained under paragraph (4)(b)(i) and (ii) shall, together with the recording required to be retained under paragraph (4)(b), total a period of 8 hours and shall be retained in accordance with arrangements approved by the Department.