ED Decision 2022/007/R
The effects of failures of the flight guidance system, including the navigation means (facilities external to the aircraft), shall be considered in accordance with the requirements of CS 25.1309 and CS 25.1329.
[Issue: CS-AWO/2]
CS AWO.B.CATII.120 Radio altimeter (or other device capable of providing for equivalent performance and integrity level)
ED Decision 2022/007/R
The radio altimeter (or other device capable of providing for equivalent performance and integrity level) shall be such that the probability of the provision of false height information leading to a hazardous situation is extremely remote. If compliance is based on monitoring, the detection of a failure shall lead to the removal or obscuration of the displayed information, at least in the height band from 30 m (100 ft) downwards.
[Issue: CS-AWO/2]
CS AWO.B.CATII.121 Excess-deviation alerts
ED Decision 2022/007/R
The probability of an excess-deviation alert failing to operate when required shall be no greater than one in one thousand approaches.
[Issue: CS-AWO/2]