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handle to the parachute.
The second part is the parachute container itself. This
is probably a white-painted aluminum canister about 6-
8 inches wide and 15-25 inches long (depending on the
size parachute packed inside the container). The parachute
may also be housed in a fabric covering called a
softpack, or in a fiberglass box. The location of this
parachute and container varies by the aircraft but will
always be at the opposite end of the activating housing
from the firing handle.
The third component is the potentially dangerous part:
The rocket motor (or other ballistic device). The rocket
motor has been used since 1987, so it is increasingly
unlikely that emergency personnel will examine the older
systems. However, like the rocket motor, all ballistic
devices which are used to extract the parachute with
great speed will be located very near the parachute. For
engineering reasons, the parachute and ballistic device
should be near one another.
On some aircraft the parachute and its ballistic device
will be mounted on top of the aircraft; in other cases,
they are toward the lower side of the fuselage. In most
cases, they will be near the surface of an enclosed aircraft.
Figure 2-22. BRS Flexible Shafts
Figure 2-23. BRS Parachute Container With
Rocket Motor
Figure 2-21. BRS Firing Handles
Figure 2-20. BRS Unit
2-18
TO 00-105E-9
It is important to observe at this time that the elements
described above may no longer be in the same relation
to one another after the aircraft has crashed.
The fourth element and final items that make up a BRS
are mounting hardware and attachment bridles which
connect parachute to aircraft. Since these are not in
the least hazardous, we’ll ignore them.
Connecting the firing handle to the rocket motor is a
housing, the purpose of which is to protect an internal
stainless steel cable against binding or jamming. The
activating housing itself does nothing but protect; it is
the cable inside this housing that detonates the rocket
motor.
The housing on BRS units has changed over the years.
The material used to be a flexible, strip-wound, bright
silver metal tube of about a half inch diameter. Later this
became a braided material similar in appearance and
size, except that the exterior is made of many small
wires braided together. The newest models use a black
plastic exterior that resembles a bicycle brake housing
except that it has a slightly larger diameter.
The housing joins the firing handle on one end to the
rocket motor on the other. Pulling either end away from
one another can detonate the unit (see diagram of the
rocket motor operation). Normally the handle and the
parachute unit will be mounted securely, but as stated
above, in an accident positions may change. Rescue
workers, police officers, and fire fighters should exercise
extreme care when working around these devices,
especially if the airplane is broken into parts.
The rocket motor should* always be aimed away from
the aircraft, commonly toward the rear, upwards or downwards,
and sometimes toward the side of the aircraft.
Every one tends to be different as most aircraft are designed
differently. (* the aiming of the motor may be
affected by the accident and it may no longer be aimed
as advised by BRS).
Rescue personnel should first determine the existence
of a BRS-brand unit. You can scan for a company logo,
often placed on the outside of the aircraft. Or you can
look for the unit itself. These containers, which hold the
parachute canopy, will always have a company logo on
them. A few other brands exist but overwhelmingly, these
units will be the BRS brand name.
Alongside the parachute container will be a 2-inch black
or white tube about 12 inches in length. This is called
the launch tube and it contains the rocket motor. A rocket
motor consists of two principle parts: The launch body,
which will leave the launch tube when fired; and the
igniter or trigger, which remains in the launch tube after
detonation. The launch tube on newer units is covered
with a plastic cap while on older models it remained
open so you could see the business end of the rocket
motor.
The open end or the cap-covered end of this black or
white launch tube is the exit point of the rocket motor
and therefore this is the dangerous end. Under no circumstances
should rescue personnel place any part of
their person in front of the departure end of the launch
tube.
2-66. The solution to the problem is to cut the housing.
The rocket motor is NOT an armed, hair-trigger device.
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