(a) Make sure the forward overboard exhaust valve, V462 is open.
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MAINTENANCE MANUAL
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(9) COMBI AIRPLANES;
push the MAIN DECK ARMED switch to off.
(a) Make sure the forward overboard exhaust valve, V462 is closed.
S 864-277
(10) Release the engine 1 and 3 N2 speed switches.
M. Cargo Bay Squib Test
S 864-287
(1)
Make sure the ARMED FWD and ARMED AFT switches are off.
S 864-289
(2)
Open these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6H6 FIRE EXTINGUISHER LOWER CARGO
N. Squib Electrical Connection Procedure.
NOTE: Do this procedure each time you connect an electrical connector
____
to a fire bottle squib.
S 864-331
WARNING: DO NOT TOUCH THE SQUIB BEFORE YOU DO THE PROCEDURES FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
S 844-290
(2)
Prepare to connect the connectors.
NOTE: Do this procedure each time you connect an electrical
____
connector to a fire bottle squib.
(a) Remove the protective cover from the fire bottle squib.
WARNING: MAKE SURE THERE IS NO VOLTAGE AT THE ELECTRICAL CONNECTOR.
_______ IF THERE IS A VOLTAGE AT THE ELECTRICAL CONNECTOR, THE SQUIB CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
(b) Make sure there is no voltage between pins 1 and 2 of the electrical connector.
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NOTE: Connect a 10 kohm resistor across the meter to remove
____ any stray voltage from the electrical connector.
S 434-291
(3) Connect these electrical connectors in the lower forward cargo compartment:
__________________BOTTLE ELECTRICAL CONNECTOR BOTTLE A FWD SQUIB DM7906B BOTTLE A AFT SQUIB DM7906C BOTTLE B FWD SQUIB DM7907B BOTTLE B AFT SQUIB DM7907C BOTTLE C FWD SQUIB DM7908B BOTTLE C AFT SQUIB DM7908C BOTTLE D FWD SQUIB DM6742B BOTTLE D AFT SQUIB DM6742C
O. Squib Electrical Connection Procedure
S 864-330
(1) Do the steps that follow to make sure you did not bend or damage the squib pins.
NOTE: Theses steps are necessary because the pins are most
____ likely to be damaged the first time an electrical connector is connected to the squib.
(a)
Disconnect the electrical connectors from the fire bottle squibs.
(b)
Make sure the squib electrical pins are not bent or damaged.
(c)
Make sure the electrical connectors are not damaged.
(d)
Connect the electrical connectors to the fire bottle squibs.
S 864-294
(2) Close these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6H6 FIRE EXTINGUISHER LOWER CARGO
S 864-295
(3) Push and hold the TEST 1 switch on the SQUIB TEST panel, M7327.
(a) Make sure the cargo A, B, C and D lights come on.
S 864-296
(4) Release the switch.
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