Trio Avionics Pro Pilot - Manual (Page 45)

Trio Pro Pilot Manual 3.8
45
The approach plate shows two possible initial approach fixes (IAF), GAYGE and ICUGA. There is an
intermediate fix (IF) at KANEC intersection and a final approach fix (FAF) at JABAL. If we begin our
approach at ICUGA, the chart shows that we must not descend below 3800 feet as we transition to
KANEC. The chart also stipulates that we must remain above 3100 feet between KANEC and JABAL.
After contacting approach control,
we request the RNAV LPV
approach using the ICUGA
transition and the controller
responds with instructions to
remain above 4,000 feet until
reaching ICUGA.
Approaching ICUGA, we use the
Altitude Select (ALT SEL) mode
on the Pro Pilot to set the target
altitude to 4,000 feet, with a
descent rate of 500 feet/minute.
Once the aircraft reaches 4,000
feet it automatically enters the
Altitude Hold (ALT HLD) mode
and continues the approach at that
altitude.
Upon reaching ICUGA the aircraft
turns and flies directly to KANEC.
We now slow the aircraft to
approach speed. When we arrive
at KANEC and begin the turn
toward JABAL (still in ALT HLD)
the GPSV LED begins to blink,
indicating that the descent signal
has become active.
The R/H side of the display screen
automatically changes to show the
cross track error in the top line of
the screen, and the bottom line
shows that the descent line is
some 800 feet above the aircraft.
The aircraft remains in ALT HLD as it continues toward JABAL and the display screen shows that the
vertical distance to the descent line is decreasing.
The screen to the right shows the line is now 420 ft. above the
aircraft) and is tracking within .01 NM is the horizontal
centerline.
The GPSV LED continues to blink until the descent line is just a few feet above the aircraft, at which time
it begins to glow steadily and the Pro Pilot commands a “bend over” maneuver. The aircraft pitches
down and begins to descend. The pilot immediately retards the throttle to remain at approach speed.
The Pro Pilot will now direct the aircraft to remain on the lateral/vertical descent path to the airport.