Fail-operational hybrid landing system
A system which consists of a primary fail-passive automatic landing system and a secondary independent guidance system enabling the pilot to complete a landing manually after failure of the primary system.
A system which consists of a primary fail-passive automatic landing system and a secondary independent guidance system enabling the pilot to complete a landing manually after failure of the primary system.
Source: EU-OPS
See also:
Fail-Passive flight control system
Fail-Operational flight control system
Fail-Operational hybrid landing system