Which model 105 are you operating? Which engines are fitted?
The C20B equipped model would be hard-pushed to deliver Cat A in Europe let alone the tropics.
Check-out the HOGE graphs - they will give you a good idea of how well the machine will cope going into confined areas.
From memory the trend check requires the non-checked engine to be at idle but it's been a while ..... cripes! 23 years! .....where does the time go .......... since I had the pleasure of flying the 105 so maybe my memory not that good.
Good luck
G