load. When the NGL BUFFER AFT push button
is pressed after the aircraft is removed from the
catapult and the buffer hook is forward, hydraulic
fluid pressure will return the pistons, piston rods,
and slide assembly fully aft.
When the slide
assembly is retracted, the buffer hook returns to a
position below deck.
When the buffer aft switch is pushed, the
buffer aft solenoid valve shifts, allowing
medium-pressure hydraulic fluid to shift the piston
of the flow control valve.
hydraulic fluid flows through the flow control valve
to the buffer cylinder assembly. Fluid pressure is
applied to the forward side of the buffer pistons;
and the pistons, piston rods, and slide assembly
move aft. As the pistons move aft, fluid is forced
out of the aft end of the buffer cylinder assembly,
through a check valve and the other flow control
valve, to the gravity tank.
Preparation for Use, Maintenance, and Testing
Prior to each period of operation, all
preoperational inspections shall be conducted. All
inspections, routine maintenance, or repairs must be
conducted according to current MRCs and the
procedures contained in the Mark 2 Mod 0
Service, Maintenance, and Overhaul
Instructions Manual, NAVAIR 51-25-19.
In this chapter we have discussed the functions
and operating procedures for the JBDs and Mk 2
NGL equipment. We also described the bulletins
used to hook up and launch aircraft from the
catapults safely and correctly.
in-depth descriptions of this equipment, see the
applicable NAVAIR technical manuals.