May I refer you to Flight International 10-16 Aug 2004 page 10
Also to the Boeing site
http://www.boeing.com/commercial/737...kit/index.html which currently puffs the -900ER.
There are five areas of improvement namely
i) FMC revisions to take account of the new aerodynamics in landing and take-off.
ii) look at the outboard seal on the kruger flap where it meets the inboard engine nacelle - the spring is replaced with an actuator. Improved flow, better low-speed lift. (Kruger open for landing, sealed for take off).
iii) all six spoilers per wing can now deflect to 60 degrees whereas previously the inboard and outboard ones could but the inner four could only deploy to about 35 degrees.
iv) Sealed slats for take-off up to 15 deg flaps instead of 10 deg (?) previously.
v) Two-position tail skid.
Maersk Air asked for improvements for the Faroes.
SHELCO endorsed the ideas for the proposed airfield at St Helena.
Gol use Santos Dumont which only has a 1300 metre runway!!!!!!!!!!!!!