PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Modes of Operation
8-38
ALTITUDE HOLD (ALT HOLD) MODE
The altitude hold (ALT HOLD) mode is a vertical flight director mode
used to maintain a barometric altitude reference. To fly ALT HOLD
mode, follow the procedure in table 8--11.
Step
Procedure
1
Put the aircraft into any lateral flight director mode.
2
Push the ALT button on the GC. The PFD annunciates, the
ALT annunciator is green while ALT HOLD is active, as
shown in the display below.
30
30
30
30
M
Altitude Hold Mode Engagement Procedure
Table 8--11
Altitude hold maintains the barometric altitude that exists when the
mode is engaged. The reference altitude can be changed by pushing
the touch control steering (TCS) button on the control wheel,
maneuvering the aircraft to a new altitude, and releasing the TCS
button. Selecting the ALT HOLD mode cancels any other previously
selected vertical mode.
The ALT HOLD mode is cancelled by any one of the following actions
or event:
D
Pushing the ALT button on the GC
D
Selecting any other vertical mode to on, or captured
D
Selecting go--around