and sensor operator (SENSO) instrument panels. The
Window/Hatch External Jettison
internal jettison initiators are the squeeze-to-pull type,
Handle/Initiator
which have a quick-release safety pin in the squeeze
Two external jettison initiators (fig. 3-9) are
segment of the operation for safetying. The
installed inside access doors on each exterior side of the
pilot/copilot handle will blow all windows and hatches,
aircraft just below and forward of the windshield aft
whereas the TACCO and SENSO handles will blow
posts. The external jettison initiator is a mechanically
only the hatch above the crewmember. The basic
fired device, with the firing pin relaxed (not precocked)
internal jettison initiators are similar to the external
before handle actuation. The sear mechanism is a
jettison initiators except for the handle and the absence
conventional ball-and-node type, which disengages
of the lanyard feature.
completely after 3/4 inch of travel. During travel, the
Window-Severance Explosive Charge
firing pin withdraws, but the handle does not disengage.
The primer fires into a lead charge, which fires the
An explosive charge is attached to the inside
output charge. The external jettison initiators have no
periphery of the pilot and copilot windows. An SMDC
safety pins, but use a 10-foot lanyard to protect against
or FCDC connects to a transfer block at the lower front
inadvertent initiation. Any partial withdrawal of the
corner of the explosive charge. The window explosive
handle from the external jettison initiator is cause for
charge is actuated by the pilot/copilot internal jettison
rejection and replacement. Either external initiator will
initiator or by either external jettison initiator through
cause all windows, hatches, fillets, and fillet supports to
the SMDC and FCDC segments. The explosive charge
blow away from the aircraft.
acts as the cutting device for the window glass.
Window/Hatch Internal Jettison Handle/Initiator
Hatch-Severance Explosive Charge
Three internal jettison initiators (fig. 3-10) are
The hatch explosive charge is similar to the
located in the crew compartment: one at the eyebrow
window explosive charge. The explosive charges of the
panel and one each at the tactical coordinator (TACCO)
INITIATOR
(INSTALLED)
DOOR
HANDLE
CAP
BOOSTER
ASSY
OUTLET
PORT FOR
SMDC ASSY
BODY
FIRING PIN
WIRE
SEAR
LANYARD
SHIELD
PIN
(10 FT)
AMEf0309
Figure 3-9.--External canopy and hatch jettison initiator.
3-12
