Regulation 68

to ensure continued safe flight; and

to assist in achieving a safe forced landing after an engine failure, under all allowable operating conditions.

2 independent electrical generating systems, that are each capable of supplying all probable combinations of continuous in‑flight electrical loads for the instruments, equipment and systems required for the operation that is the subject of the approval mentioned in paragraph (1);

a radio altimeter;

an emergency electrical supply system that, following the loss of all generated power, has the capacity and endurance to generate enough electrical supply to do all of the following:

to maintain the operation of all essential flight instruments, communication and navigation systems during a descent from the maximum certificated altitude in a glide configuration to the completion of a landing;

to lower the flaps and landing gear, if applicable;

to provide power to one pitot heater, which must serve an air speed indicator clearly visible to the pilot;

to operate the landing light specified in sub‑paragraph (i);

to restart the engine, if applicable;

to operate the radio altimeter;

2 attitude indicators that are each powered by an independent power source;

a means to make at least one attempt at engine restart;

an airborne weather radar;

a certified area navigation system that is capable of —

being programmed with the position of an aerodrome or a safe forced landing area; and

providing instantly available track and distance information to those locations;

if the aeroplane is a pressurised aeroplane, an amount of supplemental oxygen sufficient for all occupants during the period of the descent, following engine failure, at the maximum glide performance from the maximum certificated altitude to an altitude at which supplemental oxygen is no longer required;

a landing light that is independent of the landing gear and is capable of adequately illuminating the touchdown area in a night forced landing; and

an engine fire warning system.