This standard applies to general centrifugal pumps and screw pumps whose driving device is an extension shaft at one end of the aircraft fuel system. For double-end pumps with drive devices extending shafts at both ends, it can be used as two general centrifugal pumps and screw pumps working in parallel.
HB 5645-1981 history
2016HB 5645-2016 Aircraft fuel system fuel transfer pump series model spectrum
1970HB 5645-1981 Aircraft Fuel System Fuel Supply Pump Series Type Spectrum (Trial)