Is anyone out there able to shed a bit more light on the vagaries of the Sea Vixen's hydraulic system? Is it similar to the other twin-Avon types, i.e. Lightning/PR9 where each engine drives a pair of pumps; 2 of these being effectively paralleled to provide a utilities/services supply with the other 2 pumps each supplying their own 'controls' supply. This gave redundancy at almost every level.
The PR9 undercarriage emergency lowering was via a hand-pump, whereas the Lightning used one of the 2 'controls' systems to provide the necessary pressure.
The report makes mention of Green and Red system pumps; one of which seized but the other failed to provide any output. Do these pumps both provide pressure to the utilities/services system??