AF 447 Thread No. 10

[RR_NDB]

...the main difficulty is to rapidly detect an unreliable speed...

But the main difficulty is to rapidly detect an unreliable speed situation. Reaction time is crucial, since the aircraft may stall and overspeed conditions could cause aircraft damage.

Worse than that is complete loss of SA due (partially) misleading info presented by the System to a (non properly trained) crew after erratic and inconsistent data contaminated System

My rationale simply is:

Delegate to the crew the task (as per Airbus SAS) is an error. Using proven DSP techniques an A/C subsystem may warn on impending UAS. And deterministically inform of an important issue.

I posted several times this earlier

DSP and Signature analysis comment by andianjul:

Basically, the electrical ‘signature’ of a valid signal from any pitot that is being impacted by air molecules will appear decidedly different to the ‘signature’ from a blocked pitot.