I was spotting at Dusseldorf some time ago and chanced to see a Citation(can't resemble exact which series) land. What suprised me was, that the pilot retracted the thrust attenuators first when rolling to its parking position, a long time since he turned off the runway...definitively some 1.5 kilometers he taxied the plane with the attenuators deployed.
Is it a standart procedure with the Citation or have I chanced to see something unusual for some reason? Which are the normal conditions for the use of the attenuators?
(For those of yours which are familiar with DUS - the a/c landed on runway 05L and retracted the attenuators rolling on the parallel taxiway to the 05R/23L in front of terminal A).