We are asking for approval to utilize the AV-30 as a stand-alone attitude indicator, attitude indicator and directional gyro (dual unit installation), installation as a replacement for the turn coordinator (leaving the existing attitude indicator in place), and as the required backup in an EFIS installation.

If the installation configuration leaves no instruments that require a vacuum source, the vacuum pump system may be removed from the aircraft via a 337 field alteration process. The removal of the vacuum system is not included in the AV-30-C STC approval.