So where do you get the mandatory Airworthiness and life limitations from if they are not from the manufacturer?? and they are down as ADD ( ie mandatory )
I quote the Lamps Schedule
Section 3, Page 2
CAP 766 Light Aircraft Maintenance Programme – Aeroplanes
5 Airworthiness Life Limitations (Retirement/Scrap Lives)
5.1 Airworthiness life limitations shall be those published by the state of design type certificate holder and supplementary type certificate
holders.
Section 4
2 Permitted variations may not be applied to Airworthiness Directives, CAA Generic Requirements, airworthiness life limitations or
overhaul and test periods.