Avionics News January 2016 - 18
Stepping up Part 23 panel redundancy
S T O R Y
D A V E
Aviation Products has an enviable presence
in military cockpits and a growing presence
in business aircraft.
For example, L-3 GH-3900 and Trilogy series electronic
standbys bring a variety of business-aircraft cockpits the benefits of glass standby instruments with the same layout, look
and operation as the glass primary flight displays that dominate
In 2015, the company continued to build its line of cockpit
hardware for both Part 25- and Part 23-category aircraft, each
time expanding its reach and enhancing the features set to further increase their appeal. Along the way, L-3 also expanded the
variety of options available to give glass cockpits comparable
glass standby systems.
For the Part 23 fixed-wing and Part 27 rotary-wing segments,
L-3 recently debuted its most-advanced electronic standby unit
yet, the standard-gyro-size Genesis ESI-500.
Not only is it a great fit for panels undergoing retrofit installation of glass flight instruments, it's an ideal size to replace
the electromechanical three-instrument packs installed in many
aircraft factory built with glass panels. Best of all, it's a standby
instrument with features larger than its panel footprint.
H I G D O N
AN EVOLVED NEED:
GLASS STANDBY FLIGHT INSTRUMENTS
Even before general aviation began its expanding welcome
to options in flight instruments, the traditional standard for
redundancy fell short of both simple and user-friendly.
As electronic panels added features, even standby electronic
instruments tended to lack everything of a full PFD. Thanks
to a number of companies, pilots and aircraft owners enjoy
redundancy options that closely, if not completely, replicate
the digital PFD.
The instant aircraft owners began to shift toward digital flight
instruments from their familiar analog, the old, familiar layers
of redundancy lost the comfort of commonality; for years, every
instrument, flight and air-data, was analog; standby systems
might vary in size, but standby looked and behaved just like the
primary dials in the standard six-pack.
True, the original analog panels generally offered a degree of
For decades, aircraft panels generally sported the same splitsource approach to powering the then-standard three gyros: For
the turn indicator, electricity typically; for the attitude indicator
and directional gyro, air power.