Probably the wrong forum mate. You are referring to Engineer Licences.
Better off asking in the Engineer & Tech.
But...
CAA is old BCAR licence, now superceded by EASA licence. Group 7.1 refers to piston engine helicopters (i.e. a G7.1 holder can sign off any piston heli), Group 7.3 refers to turbine. Only applicable to aircraft under 2730kg.
Like I said, you will get more joy in the Eng & Tech forum.
Last edited by Salusa; 16th Nov 2007 at 01:54.