The normal approach to the landing runway is done at a 3-degree angle. The Legacy 600 is certified for a steep approach angle of even 5.5 degrees.

One of the main airports that require steep approach is London City. The Legacy 600 is the largest corporate aircraft in terms of cabin size certified to operate at London City Airport (LCY).

In the center of the English capital, LCY is a favorite facility for business passengers as it is located very close to London's financial district. Flying into LCY is also preferred due to its low volume of commercial traffic, contrasting dramatically with Heathrow and Gatwick. Additionally, departures from LCY extends the Legacy's 600 reach to destinations such as Moscow, Cairo and the Azores with 8 passengers at the normal cruise speed.

Authorization to fly from LCY was granted following certification of the Legacy's 600 steep approach capability and the addition of the First Principles software. This software was fully developed in-house and helps the pilot calculate the aircraft's takeoff weight more accurately. In airports with short runways like LCY, this feature will bring significant performance gains to current and future owners. Current Legacy 600 owners may implement a service bulletin to have this same capability.