SEAT HEIGHT ACTUATOR SWITCH.-

The seat height actuator switch (fig. 5-21) is situated immediately forward of the shoulder harness control lever. Forward movement of the switch toggle lowers the seat bucket, and rearward movement raises the seat bucket. When released, the toggle assumes the center OFF position.

PIN PULLER.- The pin puller (figs. 5-25 and 5-26) is installed on the aft right side of the seat bucket. Full aft rotation of the manual override handle is prevented by the pin puller. A pin extended from the pin puller engages a slot in the manual override linkage. During the ejection sequence, gas pressure from the right-hand seat initiator cartridge retracts the pin.

LOWER HARNESS RELEASE MECHA-NISM.- The lower harness release mechanism (fig. 5-26) includes the two lower harness locks, the two leg restraint line locks, the negative-g strap lock, the emergency restraint release piston housing, and associated connecting levers and linkages.

Figure 5-26.-Lower harness release mechanism.

Parachute Assembly

The parachute assembly (fig. 5-27) comprises a 6.2m (20-foot) GQ type 2000 personnel parachute packed, together with a ribbon drogue, into a rigid container and connected to the parachute risers. The parachute risers incorporate seawater activated release switches (SEAWARS) for attachment to the upper torso harness. These switches will automatically release the occupant from his/her parachute following descent into seawater. The parachute assembly is attached to the upper forward face of the ejection seat main beams. Some seats may contain the GQ-5000 type parachute, depending on date of manufacture.

PARACHUTE CONTAINER.- The parachute container is of light alloy construction, with

canopy breakers fitted to each upper outboard side. The breakers on the forward seat are longer than those on the aft seat. Two hooked brackets on the lower rear face of the container locate over pins on the main beams. Brackets, integral with the rear of the canopy breakers, are bolted to brackets on the main beams. A shaped headpad is attached to the front face of the container to provide head location during ejection. A hook and pile fastener is fitted to the front face of the headpad to locate the parachute risers. The container is closed by a rigid top cover, with a single lug on the RH side and two lugs on the LH side. The LH lugs deform during parachute extraction, releasing the cover to permit rapid parachute deployment. A fairing on the LH rear corner of the cover protects the parachute withdrawal line where it leaves the container.

Figure 5-27.-Parachute assembly, forward seat. 5-24