DB: Reely340 - if you really were allowed on the "Doctors" seat of a HEMs 135 doing CAT A Rejects and Continued Take-offs. Unless you are a pilot, directly benefitting from the training being delivered, the TRI(H) involved is breaking the law.
Well, let's see: I am a helicopter pilot, but not ("yet") TRed on EC135. I feel I did benefit a lot, seeing in flight auto pilot reconfiguration in action and such, but strictly speaking I'd fear my presence cannot be counted toward a possible future TR as I had not signed up (no contract) for EC135 training.
edit:
comming to think of it, the TRI asked if I were a pilot, and where I trained. Maybe he had your thoughts in mind when checking my facts.
You might like to show him this for future reference.
I'd rather not wake any sleeping dogs. It might be a grey zone, but a beautiful one, that is part of a bottom feeding PPL's quest for max. free airtime which otherwise would be well beyond budget.
I'm am aware that one mustn't
sell an annual TR check flight as scenic flight to a third party, (although that would help lowering pilot's TR overhead costs

, flight safety would be well addressed by the presence of the TRI) but was under the impression, that a free riding crew member, acting as, say navigator, doesn't count as PAX.
Always eager to learn from people in the know: What precisely is your concern?
Just my in cabin presence during said Cat A maneuvers due to their
SEO nature
or the whole idea of watching an annual TR check first hand?
Btw. that is the nice part of living close to eastern europe instead of strict rule enforcing northern germany: that guy did his TR check in an AOC listed machine (and he ain't a CPL) *ducking for cover*
PS: of course had the stuck pedal landing gone haywire we might have had to explain things a bit more detailed.