The UK Air Accident Investigation Branch (AAIB) called for research into the fatigue performance of components manufactured from high-strength, low-alloy steel.
The recommendations also contained a call to amend regulations so that mooring lines on liferafts are long enough for the raft to float at a safe distance from the helicopter.
Flight G-CHCN, operated by CHC Scotia, was travelling from Aberdeen to the West Phoenix drilling rig with 17 passengers and two crew on board, when it was forced to ditch on 22 October 2012.
