Interesting. I have seen this recently as one of a set of Warplanes cards (1989) as a camouflaged A139 LBH. It said there that it used the A129's dynamic system and landing gear with a new fuselage to carry 8 troops. They thought that it would also have an undernose gun turret and laterally mounted rocket launchers. The proposed engines were two 825 shp Rolls-Royce Gem 2 Mk 1004D Turboshafts. Maximum speed 260 kph, endurance 3 hours.