the text below is the same as in the type rating ground course.
nothing written there suggests it is a good or bad idea to use use the TQ LIMITER in normal AEO operations.
actually I don't use it myself as it is not company SOP to do so (or any of my previous companies),
but I am not against it in principle as long as you are aware you are limited to 114%/114%
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TORQUE LIMITS AND TORQUE LIMITER
EEC limits local torque to a maximum allowable value of 160%, which could
result in a total AEO power of 320% Tq applied to the transmission.
Engine AEO power can be automatically limited by the EEC in order to
protect the main gearbox by engaging the Torque Limiter function. This is
achieved by pressing the TQ LIM pushbutton on the collective grip; when
pressed the EECs control the total engine torque in order not to exceed
228% of total torque (114% per engine).
The Torque Limiter function is not available in single engine operation.
When Torque Limiter is engaged, the TQ LIMITER ON advisory message is
displayed in the CAS. If the Torque Limiter function fails, the 1(2) TQ
LIMITER caution message is displayed in the CAS.
Torque is the only parameter involved in the limitation: Ng and ITT could
reach the single engine limits even in AEO with TQ LIM engaged, if dictated
by the environmental conditions.
Torque limitation is not available in MANUAL mode.
At power-up the Torque Limiter is OFF by default: it is therefore pilot’s choice
to manually engage it.
The Torque Limiter must be engaged in order to enable the OEI TNG Mode.
TORQUE LIMITER
Engine power can be limited in order to protect the main gearbox when in
AEO by engaging the Torque Limiter function.
This is achieved by pressing the TQ LIM pushbutton on the collective grip;
when pressed the EECs control the total engine torque in order to not
exceed 228% of total torque. Torque Limiter has no effect in single engine
operation.
When Torque Limiter is engaged, the TQ LIMITER ON advisory message is
displayed in the CAS. If the Torque Limiter function is failed, the 1(2) TQ
LIMITER caution message is displayed in the CAS.
Torque is the only parameter involved in the limitation: Ng and ITT could
reach the single engine limits even in AEO with TQ LIM engaged, if allowed
by the environmental conditions.
Torque limitation is not available in MANUAL mode.
At power-up the Torque Limiter is OFF by default: it is therefore pilot’s choice
to manually engage it.