H145-D2: RNP Approach to LNAV minima
Hi,
I am uncertain about Helionix/AFCS response during RNP horizontal approach. While on RNP approach to LNAV minima, APP mode, which must automatically get armed at IF (Intermediate Fix) with NAV mode preceding from IAF (Initial Approach Fix), did not yield expected response. The NAV mode continued to remain engaged till MAPt. Referring to Flt manual & FOBN (Flight operations briefing notes by Airbus Helicopters), I seem to have checked all boxes in checklist. (Since it was a practice RNP approach under VFR, it did not have other implications)
Any inputs of what may have played against to prevent APP armament and (following) engagement ?
Cheers