The RAAF developed a procedure in Vietnam for the extraction of SAS patrols from jungle territory, rather than using the time delaying procedure of winching. SAS operated in five/six man patrols and were extracted by them clipping onto 150' lengths of rope deployed from the Huey. They were then lifted to a clear area where a landing could be made and they could board the aircraft in the usual manner. Not without risks, one aircraft had a hydraulic failure, oscillation of the load developed to the point where control was lost through exceedance of CoG limits, the patrol was dragged 200' along the ground prior to the aircraft crashing, all survived without serious injury.