Dominique Piepers posted in Air Operations
11 months ago
Public
Dear colleagues,
I have a question concerning the Table 5 in AMC2 SPA.LVO.100(b). In this table a difference is made in the roll-out control/guidance system for operations with DH between 0-49ft or NO DH.
According CS AWO.B.CATIII.113 point (c) and (d) the landing system must always be fail-operational but the ground-roll control can be fail-operational or fail-passive. Does this mean that there are certain aircraft types that can have a fail-operational landing system but a fail-passive roll-out control/guidance system?
Many thanks.
Yes, there are aircraft designs that have a fail-operative landing system and a fail-passive rollout control system. The mitigation for the failure case is that the RVR must be such that the pilot can continue the rollout manually. For runways with CAT III runway lighting facilities this is 125m. With the fail-operative rollout control system it is assumed that the redundant system will continue to provide rollout control after the failure event. Theoretically an RVR of 0 would be possible with a fail-operative rollout control system. However EU legislation flatrates the minimum RVR to 75m (system limit). Other countries have 50m.
Dear Carsten,
Thank you very much for your answer and clarifiaction.
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