Like many, lockdown has prevented much flying this year, I've taken on board all the comments and tonight I had a total GPS failure once more: which is good as it wasn't intermittent.
So, I had another bash at checking device operation to monitor the effect...and:-
(I placed another thread regarding my Skyecho not picking up a GPS signal. I now know how, but the 'why' still evades).
-Both built in GPS have no satellite reception.
-Skyecho after extended warm up, taxi and ten minutes of flight: still no GPS.
- Eventually I switch off the in-board devices one by one and found:- GNS430W off=secondary GPS unit working fine. Skyecho working fine.
-Switch back on GNS and within five seconds, all other GPS signals lost. I cycled this three times and it certainly seems like when the GNS doesn't receive a signal: none of the GPS receivers get a signal.
That's how the 'other' system fails. I would be keen to learn why this fault is occurring, the powering of the GNS clearly effects the signal for all GPS receivers. My question is, is it likely that the fault is within the GNS and I can get this bench tested, or should the focus still be on the GNS to cage connection, cage to harness wiring connections, antenna to GNS cage wiring, Antenna?
I do want this fault rectified, but just like my toothache at the dentist, every time the aircraft has been in for service, the GPS works fine. But now I have something to go on. But that's it.
(No chargers, 4G kit switched off: this is the fault-generating unit)
Suggestions welcomed, TIA.