I discovered this PDF of an Army report the other day. After some testing (1971?) of the UH-1C and AH-1G hydraulic hoses this document (below) was released in January 1972. Very interesting and informative revealing the control hose(s} positioning detail and suggested fix needing attention.
This might be of interest to other Spurs.
Dave Tela, Spur 38 (69-70)