NADAR
Re-torques are a common maintenance process and are applied to just about every helicopter I have worked on. I would say that every helicopter operating on the North Sea has re-torques in critical areas.
Interestingly the Chinook had a problem with the bull gear in the aft transmission i.e loss of torque on the attachment bolts. A regular re-torque was introduced. Boeing modified the gear to eliminate the problem. The modified gear failed 45 people died and the Chinooks time on the North Sea drew to a close.
Last edited by ericferret; 1st Jun 2016 at 12:52.