OK - last update for tonight! Interesting development, but still not resolved…
Southampton to London City flight - same Flight Plan as previously, but with the twin engined Baron.
Flight went very smoothly, until once again, final approach, and at landing clearance, throttles went straight to zero again. Nav1 was activated, but not by me. APR felt like it was activated, but the switch was still off. It was almost as if someone had taken control of the aircraft.
On this aircraft however, the throttle control would respond if I increased it - but wouldn’t sustain - would go straight back to zero. However, with this small spasmodic throttle boost available, I was able to kangaroo down to the runway and land.
During the descent, I was able to check the cockpit throttles - I’d move them, and they’d go straight back to zero - just like the flawed 2nd lesson where our beloved instructor talks at the start, the plane plummets towards the ground, and you have to stay alive by adding whatever boost you can whenever you can. When the instructor stops talking, throttle control returns. It feels exactly like that scenario here - control is taken over from you and throttle control lost when ATC gives final clearance.
Interestingly, after landing, full throttle control is functional again.
This smells of a bug of sorts surely?? If so, any known fixes - cos it feels just like that second flawed training lesson…
I’d add that if I did this exact flight without registering the IFR with ATC, and announced my intentions to land near to London CIty, this flawed throttle problem would not occur. I’ve flown it twice now with no problems at all. Only occurs if registered with ATC as an IFR flight.