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2-35. EJECTION SEAT FIRING MECHANISMS.
2-36. Of primary concern to fire protection personnel
is the prevention of inadvertent firing of an ejection seat
or canopy or hatch during rescue operations. Firing of
the escape system devices, especially the ejection seat,
during rescue operations would in all probability be fatal
for the crewmember and very likely for fire protection
personnel as well. As previously stated, ejection
seats vary in design, operation and firing procedures,
and as research continues, additional seats or modifications
to present seats require keeping abreast of all
changes that affect rescue of personnel. This is accomplished
by aircraft familiarization classes and the
reviewing of aircraft Maintenance Instruction Technical
Orders for all current inventory aircraft.
WARNING
2-7
TO 00-105E-9
Figure 2-7. Standard Military Parchute Harness Figure 2-8. Integrated Torso Harness Suite
TO REMOVE PARACHUTE
1. Unfasten the leg straps by releasing the ejector fittings.
2. Release the chest strap by releasing the ejector fitting.
3. Slip shoulder straps over the shoulders.
A. Releases crewmember from the seat
and survival equipment.
B. Releases crewmember from the parachute.
C. Personal services connection.
NOTE:
If incorporated in the seat, leg restraint lines and/or
arm restraint cables will require disconnecting.
2-8
TO RELEASE
PARACHUTE EJECTOR PULL UP
RELEASE FITTINGS
A B C
TO 00-105E-9
VIEW 1
VIEW 4
VIEW 2
VIEW 3
KOCH PARACHUTE RISER SHOULDER HARNESS BUCKLE
ROCKET JET RELEASE FITTINGS
LOCKING LATCH
COVER
LOCKING LATCH
COVER
LOCKING LATCH
ACTUATING LEVER
PULL BOTH HALVES OF BUCKLE APART
FITTING DISCONNECTED
FITTING CONNECTED
A
B
C
A
1. To release Rocket Jet Fitting, squeeze
knurled buttons marked “A”.
2. Slide locking collar marked “B” up.
3. Lift ring marked “C” out of slot.
Figure 2-9. Release of Rocket Jet and Koch Harness Release Fittings
2-9
TO 00-105E-9
2-37. Fire protection personnel are concerned with the
various ways an ejection seat and/or drogue gun, if incorporated,
may be inadvertently fired. We know the
results if an ejection seat is fired, but if the drogue gun
is fired with personnel in its trajectory, the results could
be fatal.
2-38. Many ejection seats are fired from the aircraft by
pulling down a face curtain handle. The lower firing
handle, or “D” ring, is normally located on the forward
portion of the seat between the legs of the occupant;
however, the lower firing handle may be located else
where on the seat. On most Air Force aircraft, the seat
firing mechanism is located on the forward portion of
the armrest. A rule of thumb to be observed is, “If the
seat does not have a face curtain, beware of the armrests.”
In attempting to get into the cockpit to effect
rescue, it is a natural tendency to reach for a handhold
The face curtain is ideally located as a handhold, which
if used as such, most likely will cause the seat to fire.
Unless the necessary safety precautions are exercised
prior to removing the crewmember, his flight clothing or
feet can become entangled in the lower firing handle or
armrest firing mechanism and cause the seat to fire,
see Figure 2-12.
2-39. DROGUE GUN.
2-40. Certain drogue parachutes are deployed by
means of a drogue gun. The drogue gun on the Martin
-Baker seat is normally located on the upper portion of
the left side of the seat frame-work. The gun consistsof
a barrel, which requires the drogue gun cartridge, and a
weighted piston. When the seat is ejected or the drogue
gun mechanism is inadvertently tripped, a sear is withdrawn
from the firing mechanism of the gun. This causes
the piston to be fired from the barrel, thereby extracting
the drogue parachute from its container. See Figure 2-
13 for a view of drogue gun used on one type of seat.
The drogue gun may be fired by an accidental tripping
of the trip rod or gun actuator. When safetying the drogue
gun, it is adviseable not to place yourself over the barrel
and in the trajectory area of the weighted piston.
Figure 2-10. Leg Retention Devices Figure 2-11. Emergency Harness Release
If the seat incorporates the emergency harness
release system, the method of operation and
location will vary, depending upon the ejection seat
manufacturer.
LEG
RESTRAINT
STRAP
LEG
RESTRAINT
STRAP
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