AWO.A.HUD.109 CS AWO.A.HUD.109 Head-up display landing systems

For HUDLSs that are used for primary guidance (HUD manual landing) during Category III operations (see Subpart B Section 4), the following are required:

(a)System failure conditions that result in the inability to complete the landing from the DH until touchdown using the HUDLS shall not have a frequency of occurrence of more than once every thousand approaches.

(b)In the event of an engine failure, the HUDLS shall permit the pilot to control the aeroplane without reverting to other displays.

(c)Alignment should not be significantly affected in normal operation between scheduled maintenance activities.

[Issue: CS-AWO/2]