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(e) If the aircraft is transiting an airport, Le. refuelling or off-loading passengers and freight, and expecting to depart on the same day, the pilut in charge of the aircraft will be responsible for seeing that the cabinet is focked and the key retained in his possession.
(/) On completion of a Hight, ie, aircraft stopping overnight, the cabinet will be detached from the aircraft and placed in the safe custody of the medical or customs authorities on the airport,
(g) Each such cabinet must be clearly marked with the regis-
tered number of the aircraft.
21. For the purposes of paragraph (1) of regulation 20, in- struments and equipment shall be deemed to be of an approved type if they are of a type which has been certified by the Director, or by any person authorized for the purpose by the Director, as complying with a particular specification which is for the time being approved by the Director.
22. The instruments and equipment specified in this regula- tion and in regulations 23 to 29 shall be carried in an aircraft and the measures so specified shall be taken in an aircraft in the cases indicated.
ALL FLYING ALACHINES
In lying machines for all flights.
(a) The instruments, equipment and devices required for the issue of a certificate of airworthiness in respect of the particular aircraft ;
(b) maps or charts to cover the whole route of the proposed Hight and any route to which the pilot in charge of the flying machine may reasonably expect to be diverted. Information to which the pilot in charge may need to refer in flight in order to comply with the Rules of the Air and Air Traffic Control in Schedule I to the Order; (e) first aid kit, except in the case of private flying machines; (d) spare electrical fuses for all electrical circuits the fuses of
which can be replaced in flight, consisting of 10 per ce
cetti. of the number of each rating, or 3 of each rating, which- ever is the greater.
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23. The items specified in this regulation and in regulation 24 shall, in so far as they may not be included in the requirements specified in regulation 22, also he carried by flying machines in the cases indicated in this regulation or in regulation 24 whichever may be applicable.
(1) In flying machines for flights by night.
(a) Equipment for displaying the lights described in Section
XII of Schedule II to the Order;
(b) in flying machines not equipped with radio communica- tion apparatus, equipment for making the visual signal specified in Rule 46 (3) in Schedule II to the Order;
(e) adequate electrical illumination, supplied from the main source of supply in the fiying machine, for the instruments and equipment (including maps) the carriage of which is prescribed and the illumination of which is necessary to enable use to be made of them during flight ÷
(4) turn-and-slip indicator, or a gyroscopic bank and pitch
indicator and a gyroscopic direction indicator.
(2) In flying machines for flights made under Instrument Flight Rules in Flight Information Regions above the height notified in accordance with Rule za in Schedule 11 to the Order. (0) Turn-and-slip indicator, or a gyroscopic bank and pitch
indicator and a gyroscopic direction indicator;
(b) two sensitive altimeters adjustable for changes in baro- metric pressure, one of which may be the altimeter required for the issue of a certificate of airworthiness.
(3) In flying machines for flights made under Instrument Flight Rules in Flight Information Regions below the height notified in accordance with Rale 32 in Schedule II to the Order or for Rights mude in accordance with a special Visual Flight Rule clearance.
(8) Turn-and-slip indicator, or a gyroscopic bank and pitel
indicator and a gyroscopic direction indicator:
(b) a sensitive altimeter adjustable for changes in barometric pressure, unless the altimeter required for the issue of the certificate of airworthiness meets this condition.