PRV OFF → on-side VOR/LOC → cross-side
VOR/LOC → PRV OFF.
NOTE
Ineffective if pressed when short-range navigation
source (VOR/LOC) is selected as the Primary Navaid
20 LNAV pushbutton
• pressed ..... selects the on-side long-range navigation
source (FMS) as the Primary Navaid on the onside
PFD. Subsequent presses toggle between
the on-side and cross-side FMS.
21 Diamond BRG (RH) pushbutton
• pressed .... selects VOR2 for display on the diamond (green)
bearing pointer on the on-side HSI. Subsequent
presses toggle between the different sources
following the sequence: OFF → VOR2 → ADF2
→ DF (if installed) → FMS2 → OFF
22 HSI pushbutton
• pressed .... toggles between FULL Compass and ARC
modes on the on-side HSI.
If FD HOV mode is available, it toggles between
HSI modes in the following sequence:
FULL Compass → ARC → HOV → FULL
Compass
NOTE
If HOV mode is engaged, the HSI button is ineffective
23 MAP pushbutton
• pressed .......... selects ARC+MAP mode on the on-side HSI.
Subsequent presses toggle MAP on and off.
24 WX or WX/TERR pushbutton
• pressed ... (if Weather Radar is installed) selects ARC+WX
mode on the on-side HSI.
Subsequent presses toggle WX on and off, or
between HSI modes in the following sequence:
ARC → ARC+WX → ARC+TERR (if EGPWS is
installed) → ARC
25 ALT SEL knob
• rotated ............ sets the Selected Altitude reference (bug +
digital readout) on both barometric
altimeters
26 BARO knob
• rotated ............... sets barometric pressure reference for the
on-side barometric altimeter