Install Menu Activation; Accessing Install Menu - uAvionix AV-30-C Instructions For Continued Airworthiness

7.9.2 Install Menu Activation

The install menu allows for configuration changes and adjustments
that are not normally pilot accessible. To access the Install Menu,
ensure the unit is turned off. Press and hold the main control knob
while power is applied.
Keep the knob pressed until the startup logo is shown. The Install
Menu will now be enabled for access.

7.9.3 Accessing Install Menu

To access the Install menu, press the Menu button until the INSTALL
menu is shown:
UAV-1004045-001 AV-30-C ICA
Push and Hold While Applying Power
16 Revision A