Got the Tshirt
Just to set the record straight, the engine access walkways COULD have been used in-flight, but only by the terminally deranged!
They were provided for ground access to the rear of the power plants for adjustments to be made without having to get out the 'cherry-pickers' etc. The thought of positioning oneself in a confined space close to the rear of two Centaurii at '2300, ECB' would call for total loss of hearing - or cause it!!
Ah, the electrical switches; the prop interruptors were an add-on which, on their first installation at Dishforth caused an embarrassment. They had to be selected to GROUND in order to allow transition from reverse to forward thrust but NOT for initial selection of reverse. Sooo,... newly arrived, modded aircraft was being parked on one of the pans on the N.E. edge of the airfield. It had a slight downhill slope and having started the reversing-in process, the attempt to cancel reverse failed and the accelerating machine had to be stopped by application of brakes..... result? one Bev with rearranged fin undersides!
The other electrical joy was the 'Hammond organ' - electrical distribution panel. The main contactors were BTH units which were prone to 'stickiness'. The fix was a strategically applied flying boot and very effective too but the result was that all the Bevs I ever flew on had permanent deformation of the metal grille on the bottom of said 'Hammond organ'. Aaaahhh happy days