CS AWO.A.ALS.101 Applicability
ED Decision 2022/007/R
(a) Subpart A Section 1 of this certification specification is applicable to aeroplanes, which are capable of automatic landing carried out in association with an xLS (instrument landing system (ILS), microwave landing system (MLS), and/or ground-based augmentation system (GBAS) landing system (GLS)). In addition, the automatic landing system shall meet the requirements of CS 25.1329. (See AMC AWO.A.ALS.101(a))
(b) If a head-up display (HUD), or equivalent, is required to be used to complement the automatic landing system, then it shall meet the performance and integrity requirements applicable to the type of the intended operation. Refer to CS-AWO Section 2 SA CAT I, Section 3 CAT II or Section 4 CAT III.
[Issue: CS-AWO/2]
AMC AWO.A.ALS.101(a) Applicability and terminology
ED Decision 2022/007/R
MLS and GLS are assumed to have operational characteristics equivalent to those of a conventional ILS. The terms ‘localiser’ and ‘glide path’ have been retained for use with ILS, MLS or GLS, and are intended to indicate where lateral and vertical deviation is provided to the aircraft navigation systems.
The term ‘automatic landing system’ (ALS) refers to the airborne equipment, which provides automatic control of the aeroplane during the approach and landing. It includes all the sensors, computers, actuators and power supplies necessary to control the aeroplane to touchdown. It also includes the means to control the aeroplane along the runway during the landing roll-out. In addition, it includes the indications and control necessary for its management and supervision by the pilot.
[Issue: CS-AWO/2]
ED Decision 2022/007/R
The safety level in automatic landing shall not be lower than that achieved in manual landing. Hence, in showing compliance with the performance and failure requirements, the probabilities of performance or failure effects shall not be factored by the proportion of landings made under automatic control.
[Issue: CS-AWO/2]
CS AWO.A.ALS.103 Control actions
ED Decision 2022/007/R
In the absence of failure or extreme conditions, the control actions of the system and the resulting aeroplane flight path shall not contain unusual features liable to cause a pilot to intervene and assume control.
[Issue: CS-AWO/2]
CS AWO.A.ALS.104 Approach speed
ED Decision 2022/007/R
The approach speed to be used shall be established taking into account the accuracy with which speed is controlled. It shall be specified in the aeroplane flight manual (AFM).
[Issue: CS-AWO/2]