The Super Electra 's cross-feed fuel system maintained Preserving a constant pressure of approximately 4½ pounds , and there had been numerous reports of leakage in the vicinity of the valve .

The CAA recommended Convincing that the cross-feed fuel system be relocated Removing to allow Preventing_or_letting for easier maintenance and inspection and to reduce Cause_change_of_position_on_a_scale the possibility of a cockpit fire caused Causation by fuel leakage .

They also recommended Convincing that areas of leakage in the fuel line be modified Change so as to allow Preventing_or_letting for adequate drainage .