B757s and B767s, but not so shiny any more I'm afraid, ragspanner.
Yes, NFFs are a design problem and no doubt BITE will improve with time. I've said elsewhere that I'm no Luddite and I see no objection to a single trade of Aircraft Maintenance Technician looking after the whole aircraft - Airframe, Engines, Electrics and Avionics. Aircraft maintenance isn't exactly nuclear physics is it? My point is that if we are to go in that direction then proper training must be provided. The UKCAA and operators seem satisfied to leave the poor old LAE to teach himself at his own expense. There are people on this forum talking about trading exam questions. What kind of training is that, and what kind of LAE will result? The NFF rate is as much a result of blind box changing as it is a design problem. The highest NFF rate in our operation is the APU Control Unit, yet it doesn't feature in the FIM until box number 33. It IS an easy bit to change and sign off for dispatch though, especially if you're unsure of how the APU really works. Or you think you know but are actually unaware that you don't have the full picture. If it isn't the result of stupidity or laziness on the part of the LAEs who change the box, why do they do it?
"If you think training is expensive, try substituting ignorance..."
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Through difficulties to the cinema