Originally Posted by
henra
Wow!.
From 35k to 10k ft in <13minutes. And then from 10k to 2k in less than two minutes.
From the FR24 .csv file linked earlier, looks like they left FL340 at about 09:15:47Z:
They descended through FL100 at 09:30:18Z:
Descending 24000 feet in 14:31 gives a little under 1700 feet per minute, fairly reasonable I would say. Check my math(s), like timezones, this stuff is easy (for me) to mess up.
On the other hand from FL100 to FL19 (these Mode-S altitudes are all referenced to QNE so the differences should be right even though corrections need to be added for QNH and QFE altitudes) looks like 162 seconds to lose 8100 feet or about 3000 fpm.
DaveReidUK posted this plot of the altitude data for the last few minutes of the flight:
And unworry posted this plot with a derived rate of descent:
