747 Downwind... You exhibit a degree of ignorance with regards training, and in other areas...
Line training is not conducted by a TRI/TRE, it is a LTC who carries out his role. LTC = Line Training Captain.
A TRI or a TRE is a higher level qualification and although they are usually LTC qualified, they tend not to do much line training as they are required elsewhere.
and by this I mean multi-crew experience.. even on a shed!
You obviously intended that as a joke... but the ex Shedders on this forum will probably take umbridge at that comment...