Tyro Picard
What you have said is absolutely correct regarding the TLA sensors.
However, before a certain 'mod', if you had a failure or disagreement of one of the sensors in flight then the Approach Procedure read like this:
- IF AUTOLAND NOT USED
- At 500ft AGL:
-ENG MASTER (affected).......OFF
Affected engine must be shut down, because when thrust levers are retarded, A/THR would remain in SPEED mode. During flare the thrust of the affected engine would increase to maintain the A/THR' target speed.
This actually happened to a colleague of mine some time ago and definately got our attention. One assumes that the 'mod' had been done on this aircraft? I don't know if there is any relevance here, but you never know.