will never fail simultaneously
They didn't fail and certainly not simultaneously. if they clogged up for more than 10 sec. at the same time
the ADR DISAGREE message would have been displayed at ~ 02:10:15 ISO 02:12:xx.
First RH(FO) Pitot freezed up, 5 sec. later LH probe, a few sec. later STBY probe which returned to normal value for a brief moment.
@02:10:20 LH and STBY returned - but faulty -.
@02:10:40 LH was back on line (correct displayed) and 5 sec. later also RH probe. (FDs returned and needs 2 valid speeds)
At that time they switched over to ADR3 as source for RH PFD,
IMO If they didn't had done that action they would have had proper and coherent speed displays on both LH as RH PFD. (35 sec. after start of event)
ADR3 returned at 02:11:10.
ADR 1 returned in ~30 sec., ADR 2 in ~35 sec. and STBY in ~1 minute.
loss of speeds thereafter caused by hi AOA & NCD ADIRU output.
@RRR:
Don't know what you mean with 'sub'heated, its self temp. controlled.
The heat applied is inversely proportional to the temperature of the probe.