OK,
now,
Im gonna do a sidey,
was it a NUT
or
a BOLT
it does make a difference,
nuts and bolts of equal size normally have differing torque settings,
were you torquing it up appropriately?
or merely to the point before it rings?
does it matter,?
was it actually tight enough?
were you using a 1/4" socket, or was it a spanner, or even a wrench.?
did you not do a RA and follow the method statement,?
sounds like an avoidable incident, your H&S person needs informed, and, it looks like you were negligent, and could well be sacked.......
not looking good for you Noz,