Wed May 09, 2018 7:42 pm
#1610790
Our Garmin 430w has just failed for the second time in 18 months. Symptoms are identical to last time, Nav1 CB popping, which turned out t be a burnt out voltage regulator on the 430 power module.
This is the 3rd failure in 6 years (first failure was different) and it's off got another £1k + VAT repair.
We don't have an avionics master switch and I'm wondering if this is exposing the 430 to nasties during engine start up and shutdown leading to premature failure of the power management components?
The 430 is of course switch off during start up and shut down but so far as I'm aware there is power to the unit the whole time the master switch is on.
The installation manual makes no mention of an avionics master switch as a requirement, but would it electrically isolating it for transient voltages during start up and shut down help avoid a repetition in the future?
This is the 3rd failure in 6 years (first failure was different) and it's off got another £1k + VAT repair.
We don't have an avionics master switch and I'm wondering if this is exposing the 430 to nasties during engine start up and shutdown leading to premature failure of the power management components?
The 430 is of course switch off during start up and shut down but so far as I'm aware there is power to the unit the whole time the master switch is on.
The installation manual makes no mention of an avionics master switch as a requirement, but would it electrically isolating it for transient voltages during start up and shut down help avoid a repetition in the future?