Yet I still was executing the approach as if it had a glidepath and no step-down fix, even though the glideslope needle was flagged.
After clearing the obstacle and passing the step-down fix, I resumed my descent, visually acquired the airport and joined the pattern for an otherwise normal arrival.
Without the step-down fix, you can't descend any lower than the step-down fix altitude on the approach.
You can just identify the step-down fix by its distance from the missed approach point.
We spoke with our contact at Bendix/King to get to the bottom of the missing step-down fix and to learn about other limitations the KLN-series of navigators might have.
It's critical that when flying behind these navigators, pilots should reference the distance from the MAP (or distance from the FAF when identifying an intermediate step-down fix) to determine when they have crossed the step-down fix.
In response, the CANPA procedures were developed, encouraging operators to establish a stabilized, constant-rate descent after crossing the FAF or a step-down fix, with the idea of arriving at or near the MDA and sighting the runway environment at roughly the same time.
First of all, the VDA's descent angle can be computed using either the FAF or a step-down fix.
I would not teach or approve disregarding a step-down fix
altitude on an instrument approach in "good VFR" at night, period.
Sometimes an approach procedure with LNAV, LNAV/VNAV, and LPV lines of minima have a step-down fix
that only applies to the LNAV line of minima.
By the way, JEBIX, the last step-down fix
for the localizer-only version of this approach, is not contained in the GX-60 database.