I can see nothing in the above that suggests that the "service instruction" was not consistent and appropriate for the identified fault.
I would have thought that checking for tightness on the ground and in the air is not the solution. The solution is to modified the connectors so that they do not work loose. I understand that checks were carried out on the ground on every A/F, and every 15 mins in flight (according to S/L Burke).
Would you be happy to drive a car that had a wheel nut problem, but the supplier said it was save as long as you (1) checked after every journey that the wheel nuts were not loose, and (2) if you are travelling any distance you should stop ever 50 miles and check them.
DV