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
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
Figure 5-26.-Lower harness release mechanism.