Solid State electronics are based on witchcraft, the trificult bit is getting the blue smoke back into the little bobbly plastic thingummies once it's escaped.
Little bobbly plastic thingummies with blue smoke intact, waiting to be fitted to the latest candle.
My father was based at Renfrew (now Glasgow International Airport, I believe). He often had to attend Heathrow as he and his counterpart at BOAC were both answerable to the same Board.
In the event of AOG (Aircraft On Ground) for electrical failure it was their job to attend and decide if it was too serious to condemn flight and pay for local engineers to repair. Obviously the most economic solution was for the Chief Engineer in question to complete remedial works in order to get it back home (without passengers) for works to be completed. Renting a space on a foreign apron was, and still is, excruciatingly costly.
What hacked my father off was whilst he was covering Europe and often attending to stricken propeller powered planes stranded in Iceland or Helsinki his opposite number was sent to Hong Kong or Americaland for days at a time to assess VC10s etc.
The grass is always greener isn't it?