MK 432 MOD 4 AIRBORNE TORPEDO
PRESETTER TEST SET
The MK 432 MOD 4 airborne torpedo presetter test
set (fig. 16-18) has capabilities for functionally testing
the presetter portion of the armament control panel
subassembly in the aircraft. It can also be used to check
aircraft wiring and the torpedo umbilical connector.
The MK 432 MOD 4 test set is used with the P-3 and
S-3 aircraft.
FORCE RETENTION GAUGE
The force retention gauge (fig. 16-19) is used to
functionally check the bomb rack nose and tail arming
solenoids.
You
should
refer
to
the
applicable
maintenance
instruction
manual
for
the
proper
retention readings.
REVIEW NUMBER 2
IN ANSWERING QUESTIONS 1 THROUGH 5,
MATCH THE DESCRIPTION WITH THE TEST
SET.
DESCRIPTION
TEST SET
Q1. Used
to
evaluate
the
operational readiness of
the
Walleye
weapon
guidance section cockpit
television display
A. TS-3279
Q2. Used
to
perform
the
operational checks of the
AIM-9 missile launching,
visual target acquisition
system (VTAS), and Side-
winder
expanded
ac-
quisition mode (SEAM)
B. B203 torpedo heat
and control system
test set
Q3. Used to check the VTAS/
SEAM system on AIM-9
missiles
C. AN/DSM-77
Q4. Used
to
verify
the
operational status and
function of the AIM-7
Sparrow missile on the
F-14 aircraft
D. Sparrow missile
test set
Q5. Used to perform circuit
continuity tests on Mk 46
torpedo preset circuits
E. AN/ASM-464
TEST EQUIPMENT SAFETY
SUMMARY
LEARNING
OBJECTIVE:
Recognize
the
safety precautions to follow when working with
aircraft weapons systems test equipment.
The test equipment discussed in this chapter is
designed to perform various functions. Two of the most
important functions are—
1.
to ensure the correct firing voltage is available
at the appropriate station when the cockpit
switches are properly set, and
2.
to ensure that voltage or stray voltage is not
present before electrical connection of certain
launchers, such as rocket launchers, is made.
These two functions are called aircraft release and
system control checks. Normally, you perform aircraft
release and system control checks before the weapons
are installed on the aircraft. However, some checks
require the weapons to be loaded on the aircraft. As part
of the loading process, the Sparrow, Phoenix, Walleye,
and Sidewinder (on some aircraft) weapons are
electrically mated to the aircraft. Then, the external
power
is
applied
to
the
aircraft,
and
a
missile-on-aircraft test (MOAT) is performed. This test
is normally performed during the prior-to-launch
sequence.
You conduct the Sparrow and Phoenix MOAT by
activating the circuits within the aircraft. Then, you
observe the indications as they are received in the
cockpit. No test equipment is required to perform this
test.
At least two team members and a team leader using
an audio headset and a TTU-304/E tester perform the
Sidewinder MOAT. The TTU-304/E tester is basically a
pencil flashlight with an infrared filter lens.
The person in the cockpit plugs the headset into the
audio connection and turns on the switches indicated in
the checklist. These switches are Sidewinder COOL,
STATION SELECT, and AUDIO CONTROL. The
person at the missile station removes the missile
protective dome cover. Then, with the tester turned ON,
the beam of the tester is moved across the nose of the
missile from a distance of 4 to 6 feet. As the missile
senses radiation from the tester through the launcher's
audio amplifier, a tone is heard in the headset. If more
than one missile is loaded, each missile should be tested
and the dome covers replaced. Sidewinder MOAT may
also be performed during pretaxi arming signals with
the pilot as the person in the cockpit.
16-13
