TFR Pod
Must have been the most unreliable bit of kit ever fitted to an aircraft. At Akrotiri every trade was an expert on TFR pod changes, lucky to survive a single trip. It has a nasty design fault, the ram air cooling fed air from the outside straight over the electronics. Pass though a nice bit of wet weather and it played havoc with the internals. Many a time have seen a TFR pod tipped on end to get the "excess moisture" out. As I recall no-one really trusted it anyway, always a flown with a good lookout.