Wensleydale,
I remember the nav's burning cheese sarnie story exactly as you describe, and wonder if it had been told in Air Clues.
On a similar note, there was the USN F14 jockey who after startup, suffered severe burns on selecting 100% O2...and having it react to his hair gel. It is a very distressing story. He was only rescued from his cockpit after one exceptionally brave member of the deck crew climbed along the spine to operate the external canopy open and shut down the engines.
Camlobe