Bombdoors
Dear Danny
Bombdoors did just occasionally open themselves. Nicely settled in the climb in a Canberra (250kt max at the time to offer the chance of overpowering any runaway elevator trim) we shuddered then it stopped, shuddered again, stopped, and so on. Eventually out of the corner of my eye I saw that the B/D dollseye was alternating black/white/black to tell me that the doors were opening and closing without my help.
The cause turned out to be a short in the Master Jettison switch, which some genius had positioned almost directly under the DV window, which of course let in rainwater if it was not firmly shut on the ground. Fortunately the load was the usual 8 x 25lb, which could not be jettisoned. If it had been the 6 x 1000lb which constituted the Heavy Load we had to carry once in a while the good burghers of Nottingham would presumably have collected the lot.
And like many others may I say "Thank you".