Originally Posted by
DaveReidUK
Hasn't it always been mandatory for any removable fasteners in the flight control linkages to have positive locking, for example castle nuts/split pins, locking tabs, etc ?
I have a vague memory of being told Boeing doesn't like to use 'lock nuts' (i.e. those with some sort of deformable aspect that keeps them from loosening) because people tend to re-use them and they wear out, instead using things like castle nuts with pins or lockwire for positive retention.
However that only works if someone actually installs the lockwire/pin...