Whiz,
I did some homework (talked to a few pilots) and was told that the 777 needs to be on the ground before the reversers will work. Got similar answers from A320 and 767 pilots. Perhaps the 10ft limit is only on the older (727, 737) Boeing designs- lawyers maybe?
Hi Checky,
I just checked the FCOM, and it does indeed say "On the ground", but I'm sure they unlock at 10ft RA as I've done it in the Sim. I'm pretty sure that was also stated on the CBT on the type course, but in their wisdom we don't have access to that any more.
As yo know, Boeing can be a bit "Ecconomical" about what gets in their manuals.