•
•
•
PA-28-181, ARCHER
m
Autopilot {Optional) (continued)
AUTOPILOT FEATURES (continued)
Overspeed Recovery Mode (continued)
SECTION?
DESCRIPTION & OPERATION
is not active in ALT or GS modes and the airspeed reference (FLC) cannot be
adjusted while in Overspeed Recovery mode.
Takeoff Mode {Optional)
Takeoff Mode allows the pilot to manually follow the flight director command
bars a[Lc::r 1akc::uf
f
rutaLiun. Takeoff Mode is activated by pressing the TO/GA
switch on the throttle lever while on the ground. Whenever Takeoff Mode is
active, "TO" will be displayed as the lateral and vertical modes in the AFCS
status box.
Go-Around Mode {Optional)
Go-Around Mode allows the pilot
10
manually follow the flight director
command bars during a go-around maneuver. Go-Around Mode is activated
by pressing the TO/GA switch on the throttle lever while in flight. Whenever
Go-Around Mode is active, "GA" will be displayed as the lateral and vertical
modes in the AFCS status box. Autopilot coupled Go-Around is available as an
optional feature. During a coupled go-around the autopilot remains engaged and
the pilot must add power and reduce drag according to the Go-Around checklist
(Section 4).
Underspeed Protection {Optional)
Underspeed Protection (USP) is a flight director function that provides low
speed awareness and prevents the airplane from stalling. The autopilot must
be engaged for USP to function. An AIRSPEED aural alert and an amber
MINSPD annunciation activates to indicate a low airspeed condition. If
airspeed continues to decrease, a USP ACTIVE CAS warning is triggered
and lhe airplane pitches down. If the flight director is in a non-altitude critical
mode (VS, VNA V, PIT,
L
VL or FLC) the airplane pitches down to maintain
airspeed above the stall warning speed. If the flight director is in an altitude
critical mode (ALT, GP, GS, TO or GA) the airplane may decelerate to stall
warning. After stall warning the airplane rolls wings level and pitches down
to achieve and maintain a speed approximately two knots above stall warning .
When in USP mode, the flight director modes remain unchanged, and the pitch
mode annunciation turns white. In all cases, the pilot should take action to exit
the underspeed condition by increasing engine power and decreasing drag as
appropriate.
ISSUED: December 22, 2017
REVISED: May 7, 2018
REPORT: VB-2749
7-41
