Some interesting notes in the FCOM section on this mode - TB do you have this, because if not I suggest you request it from LH?
Careful preparation and pre-flight briefing is essential to achieve maximum
safety and value during Cat A training flights. In particular, training
flights carry the possibility of errors and incorrect actions by
trainees and Cat A training is no different. It is most important that
instructors have a clear abort strategy to recover from manoeuvres
that go wrong for whatever reason. The available abort strategies are
discussed below, along with general guidelines for the planning, briefing
and conduct of Cat A training flights.
Carefully brief the abort procedure in the event of non-optimum
conduct of a manoeuvre. Also brief the indications that would
require use of the abort procedure. Indications of a potentially
unsuccessful manoeuvre could include for example: early and
excessive loss of NR, higher than expected rate of descent, incorrect
application of controls, incorrect aircraft attitudes, student not
following briefed procedure, etc. Training inevitably carries the
chance of less than ideal handling or other problems, and an
abort strategy correctly briefed is important.
Using the Torque
Limiter button takes away the Torque Limit function, which can
lead to a greater chance of AEO over torque if the button is used
when NR is low as both engines work at the maximum rate to
accelerate the rotor back to 102%. The automatic disengagement
of the Training Mode at 87% is intended as a final opportunity for
the aircraft to ‘save itself’ and should not be considered the primary
means to disengage Training Mode. Instructors should use
the Torque Limiter button or Training Switch as the primary means
of disengagement and should use one of these methods immediately
if the safe outcome of the intended training manoeuvre is in
doubt at any stage.