TM 55-1510-221-10
or a radar warning signal has been received, and
announce that flares or chaff have been fired.
4-4. SYSTEM DAILY PREFLIGHT/RE-ARM TEST.
The following test procedures shall be conducted
prior to the first flight of each day and prior to each
re-arming of the dispensers. The first dispenser
tested shall be the one used to dispense flares and
the second one shall be the one used to dispense
chaff. Notify AVUM if any improper indications
occur during the tests.
Assure payload module is not connected
to dispenser assembly at any time during
the following test procedure.
1.
On flare dispenser assembly, assure the C-F
selector switch is in F (flare) position.
2.
Obtain M-91 test set and assure that TEST
SEQUENCE switch is in START/HOME
position.
3.
Connect base plate of test set to breech of
dispenser assembly. Secure both mounting
studs uniformly hand tight, using 5/32 inch
hexagonal wrench provided in test set carry-
ing case.
4.
Obtain test set power cable from the M-91
test set carrying case and connect cable
between exterior connection J 1 (28V DC) on
aircraft and aircraft power + 28V DC (J1)
of test set.
5.
Remove safety pin from EM and in the top
skin of the right wing.
On DCP, assure that RIPPLE FIRE
switch guard is in down position.
6. Provide aircraft power to DCP by setting
M- 130 POWER circuit breaker to ON posi-
tion.
7.
On DCP, press ARM lamp. Lamp will illu-
minate. Release ARM lamp. Lamp will
extinguish.
8.
On DCP, set FLARE counter to 30 CHAFF
COUNTER to 30 and MAN-PGRM switch
to MAN position.
9. On DCP, set ARM-SAFE switch to ARM.
ARM lamp will illuminate.
NOTE
When the test set is installed on the dis-
penser assembly and 28 volts DC aircraft
power has been applied, the sequencer
switch inside of dispenser assembly resets,
making an audible sound as it rotates.
There will be no such sound if the
sequencer switch has been previously
reset or if switch is in position 12 or 24.
NOTE
On test set, TS PWR ON lamp (clear)
illuminates
and
remains
illuminated
throughout the test sequence until aircraft
power to test set (via test set power cable)
is disconnected or shut off.
10.
Set mission chaff program on EM.
11.
Perform the following operations on the
M-91 test set:
a.
Press to test the remaining three lamps
on test set. Each lamp will illuminate.
NOTE
Replace any lamp that does not illumi-
nate when pressed. If none of the indicat-
ing lamps illuminate, return test set to
AVUM.
b. Rotate TEST SEQUENCE switch
clockwise to the next position, TS
RESET. No visual indication will
occur.
c. Rotate TEST SEQUENCE switch
clockwise to SV SELF TEST position.
STRAY VOLTAGE lamp (red) will
illuminate.
d. Rotate TEST SEQUENCE switch
clockwise to next position, TS RESET.
STRAY VOLTAGE lamp (red) will
extinguish.
e.
Rotate TEST SEQUENCE switch
clockwise to next position, STRAY
VOLT. STRAY VOLTAGE lamp (red)
should not illuminate.
f. Rotate TEST SEQUENCE switch
clockwise to next position, SYS NOT
RESET. SYS NOT RESET lamp
(amber) should not illuminate. If lamp
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