DA20-C1 Flight Manual
Supplement 5
Doc # DA202-C1 April 16, 2009 Page S5 - 8
Revision 24 DOT Approved
The following list describes the various features illustrated in Figure 1.
1. Turn Coordinator – Provides basic flight information, autopilot mode switching
and annunciation.
2. Mode Annunciation window – displays mode in use.
3. Green Ready (RDY) Light – Illuminates when autopilot is ready for engagement.
When autopilot is disconnected, "RDY" will flash for five seconds accompanied
by a beeping audio tone.
4. Mode Select/Disconnect Switch – Each momentary push of this knob will select
an autopilot mode, left to right, beginning with ST (Stabilizer) mode and ending
with (Hi) TRK mode. Holding the knob in for more than 2 seconds will disconnect
the autopilot. Turning the knob left or right in the stabilizer mode will provide
left/right commands to the autopilot proportional to knob displacement up to a
standard rate turn.
5. Altitude Hold Engage/Disengage Switch – This control stick mounted switch will
engage or disengage the Altitude Hold Mode as desired. The blue (ALT) light on
the annunciator panel will illuminate when ALT. mode is engaged.
6. Heading Mode – If the system is equipped with a D.G., this mode will permit
preselected left/right turns using the D.G. heading bug.
7. TRK (Track) – using the (Lo) mode of the tracking feature will provide low system
gain for comfortable cross country tracking of VOR or GPS signals. Using the
(Hi) mode of the tracking feature will provide a higher level of system gain for
more active tracking of VOR, GPS or Localizer front course signals.
8. Trim UP Light – Illuminates to indicate the need for nose UP trim.
9. Trim DOWN Light – Illuminates to indicate the need for nose DOWN trim. When
both lights are out, the aircraft is in trim longitudinally.
10. Blue (ALT) light illuminates when altitude mode is engaged.
11. Flag Window – Red flag visible indicates lack of electrical power to primary turn
coordinator unit.
12. Autopilot Master ON-OFF Switch – Refer to pre-flight procedures for operating
details.
13. Remote AP disconnect switch.
14. GPSS Heading Switch / Annunciator. Works in conjunction with “HDG” mode.
When the GPSS is activated the GPSS converter changes ARINC 429 steering
data received from the GPS to heading signals.