Page 128 - Overseas Territories Aviation Requirements Consolidated - Total AOC

Regulation OTAR Part 121 - CAT - Large Aeroplanes

(2) the time in hours, minutes and seconds;
(3) barometric altitude;
(4) indicated airspeed;
(5) mach number, if the speed limitation prescribed by the aircraft flight manual is
expressed in terms of mach number.
(b) An aircraft shall be equipped with spare fuses of appropriate ratings, where necessary, for all
electrical circuits that can be changed in flight (at least 3 of each rating, or 10 % of the number for
each rating, whichever is greater).

OTAR.121.645 VFR flights operated as controlled flights
An aircraft flying under the visual flight rules, but as a controlled flight shall be equipped in accordance with
121.655.
OTAR.121.650 Equipment for flight in icing conditions
An aircraft shall be certificated and equipped to operate in icing conditions, for flight in circumstances in
which icing conditions are reported to exist or are expected to be encountered.
OTAR.121.655 Aircraft operating at night or under IFR
Note: ‘With the surface in sight’ means with the flight crew being able to see sufficient surface features or
surface illumination to enable the flight crew to maintain the aircraft in a desired attitude without reference to
any flight instrument.
(a) An aircraft flying at night or under IFR or when the surface is not in sight shall be equipped with a
means of measuring and displaying:
(1) magnetic heading (standby compass);
(2) the time in hours, minutes and seconds;
(3) barometric altitude, from two independent altimetry sources;
(i) in a pressurised aeroplane these shall have counter-drum pointer or
equivalent presentaton;
Note: Neither three-pointer nor drum-pointer altimeters satisfy the requirement in (3)
above.
(4) indicated airspeed, with a means of preventing malfunctioning due to either
condensation or icing; and
(i) mach number, if the speed limitation prescribed by the aircraft flight manual
is expressed in terms of mach number;
(5) in an aeroplane: turn and slip;
(6) for each required pilot: aircraft attitude; except
(i) in an aeroplane: one attitude indicator may be replaced by the turn and slip
indicator;
(7) stabilised aircraft heading;
(8) whether the power supply to the gyroscopic instruments is adequate;
(9) outside air temperature; and
(10) rate of climb and descent.
(b) An aircraft shall be equipped with spare fuses as described in 121.640 (b).
(c) In an aeroplane of MTOM over 5,700 kg:
(1) one attitude indicator shall be powered by a separate power source, which operates
automatically for at least thirty minutes after total failure of the main electrical
generating system; and
(2) shall provide an indication on the instrument panel of when the attitude indicator is
being operated by emergency power.

Note: The flight instruments requirements may be met by combinations of instruments or by
electronic displays provided that the safeguards against total failure, inherent in separate
instruments, are maintained (see 121.660).
(d) When operating at night, the following lights:
(1) lights, as required by the Rules of the Air;
(2) illumination for all flight instruments and equipment that are essential for the safe
operation of the aircraft;
(4) lights in all passenger compartments;
(5) two landing lights;
(6) an independent portable light for every crew member station; and
(7) a means to illuminate or detect the formation of ice.

OTAR.121.660 Glass cockpit systems
An aircraft with advanced cockpit automation systems (glass cockpit) shall have system redundancy that
provides flight crew with attitude, heading, airspeed and altitude indications in case of failure of the primary
system or display.
Overseas Territories Aviation Requirements 128 of 386