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Old 9th January 2012 | 11:54
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Checkboard
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Joined: Aug 1998
: ATPL
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From: Ex-pat Aussie in the UK
FMA CATIII single, or CATIII dual

The system is configured for an ILS autoland and is operating with either single redundancy or dual redundancy.

Cat III Dual - system is "Fail operational", and a single failure (of generator, autopilot, ILS receiver) will not prevent an automatic landing.

Cat III Single - system is "Fail Passive", and a single failure will not result in a control problem, however an automatic landing will not be possible. (i.e. a failure of a generator, autopilot etc may result in you hand flying, which will require a Cat 2 or 1 landing minima, depending on the failure.)
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