Cessna 150 master switch
We have a Cessna 150 and have been experiencing problems with a low voltage light coming on during flight which we have now rectified.
In the process of checking the work that had been done to correct this problem, we discovered that whilst running the engine at a high RPM and then turning the master switch off to isolate the electrics, the radio and cockpit intercom systems remained live and would not switch off with the master switch.
When it was retried later with the engine stopped, isolating the master switch would cut power to all equipment as I think it should do but did not do this when the engine was running at 2300 RPM.
Is this normal and has anybody else experienced this.???