B757 wake turb cat

[flyby797]

Hi, The B757, while weighting below 136 t, is considered hvy (at least in my doc.). Has it been always the case?

[extreme P]

http://en.wikipedia.org/wiki/Wake_turbulence

No. 757 wake turbulence was blamed for several crashes which prompted the change.

[flyby797]

Thanks for the info. But would it be possible to date that change?