You load the chaff module (item 7) with chaff,
decoy flares, jammers, or a mixture of these payloads
and a squib board (item 6). Then, insert it into the
module cavity (item 5). Secure the chaff module in the
cavity by locking the four positive locking latches (item
9). The 120 chaff tubes (item 10) contain the payloads.
Each pod houses two separate modules.
The squib board (item 6) has four layers fastened
and bonded together. The top layer is a thin sheet metal
cover. The second layer is composed of edge spacers to
provide a wire cavity for squib circuits. The remaining
layers are composed of electrical insulating and
fire-retardant materials. Two 61-pin electrical
connectors connect the squib board harness (item 13) to
the intervalometer circuitry. Place the squib board, with
120 Mk 131 impulse cartridges inserted, on top of the
chaff module and secure it with eight captive attachment
The intervalometer (item 2) is used to control the
burst rate. The intervalometer circuitry responds to the
settings on the pod control indicator or the cockpit
control indicator. The intervalometer contains a
solid-state component electronic timing pulser to switch
the two automatic stepping switches. The stepping
switches will operate individually for singles firing or
in parallel for doubles firing.
Figure 10-42.Pod control indicator.
Lanyard Disconnect Switch
The lanyard disconnect switch (item 11) is the main
safety feature preventing cartridge detonation during
chaff loading and ground maintenance. The switch is
normally in the closed position. It is deactivated
(opened) by inserting the lanyard pin in the switch
socket. With the pin inserted, the lanyard disconnect
switch opens the intervalometer circuitry and removes
the electrical path to the squib board circuits.
The two access plates (item 12) provide access to
the pod electrical connectors.
Pod Control Indicator
The pod control indicator (fig. 10-42) is located on
the bottom center of the pod. It provides a means of
selecting the burst rate and firing sequence. The
controls are preset before flight to meet expected
mission requirements. Table 10-1 lists the eight
combinations of firing that can be obtained by
Table 10-1.Firing Time and Sequence