A twist to the tale.
Hoping to continue with trouble free flying I flew the Herc again last night only to have the cut out problem reoccur. Being somewhat miffed by this I set about some general handling and failure simulation. Attempting to restart feathered engines kept me amused for quite a while whilst generally flying in circles. To my total surprise the systems that had cut out magically came on line again enabling me to complete the planned sortie. This has lead me to think about the possibility that the trouble could be program/processor overload; in that the program/processor gets maxxed out and shuts down the AP, GPS etc systems then takes xx minutes to sort itself out and reinstate the shut down systems.
What are the feelings/thoughts about this scenario?

Ian