Hi,
Reading again on
Thiels NWA 722 (Stony Point) in that bad day for 727īs
(TWA Flight 514) we can remember how difficult can be the diagnosis of certain failures. A simple interface was capable to mislead the Flight 6231 crew probably creating to them a "high speed mental model".
A complex System under multiple failures (bad data, etc.) processing this garbage
and presenting it could easily transform a simple and brief failure into an unsolvable problem. This is due HF or a "scare design"?
Obviously HF would be present.
But, IMHO this is an engineering problem.
We may say the simple 727 interface was not adequately redundant (lacking AoA, important when air data was unreliable).
But when you fed a complex System (with authority of "hard limits", protections, etc) with e.g. unreliable AoA probes, obsolete AS probes, etc.
