On lockwiring:
In a previous life, I was an Avionics Technician working on RAAF Mirage Fighter jets. One of their least reliable bits of equipment was the AN/APN 153(v) Navigation Doppler radar that rarely provided the pilots with Drift Angle and Ground Speed. The black box that provided all this data had a Mean Time Between Failure (MTBF) of about 30 minutes by my assessment. But we still had to lockwire the damned thing in there. And the 47 screws of the cover plate just to get access to the bloody thing.
For any Technicians that ever had to remove and refit the Doppler R/T baseplate, there should be a Commonwealth Award just for that!
And also for the pilots that managed to fly them safely IFR..
