Fail-Operational flight control system
A flight control system is fail-operational if, in the event of a failure below alert height, the approach, flare and landing, can be completed automatically. In the event of a failure, the automatic landing system will operate as a fail-passive system.
Source: EU-OPS
See also:
Fail-Passive flight control system
Fail-Operational flight control system
Fail-Operational hybrid landing system