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Emergency restraint release system
PARACHUTE CONTAINER

Aviation Structural Mechanic E1&C - How airplanes are built and how to maintain them
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Operation of the emergency restraint release handle simultaneously operates the SAFE/ ARMED handle to the SAFE position. In the event of automatic sequence failure, operation of the emergency restraint release handle subsequent to ejection will fire a cartridge to operate the upper and lower harness locks and the parachute deployment rocket motor. SHOULDER HARNESS CONTROL LEVER.– The shoulder harness control lever (fig. 5-21) is attached to the LH side of the seat bucket and is connected to the shoulder harness reel. When the lever is in the forward position, the shoulder harness reel is locked, preventing all forward movement of the seat occupant. When moved to the rear position, the seat occupant is free to move forward and backward. Should the seat occupant move forward rapidly, however, the shoulder harness reel will lock and remain locked until the load on the webbing straps is eased. 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. 5-23







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