S 434-042
(8)
Tighten the gland nuts to 45-55 pound-feet.
S 434-043
(9)
Attach a lockwire to the gland nut on the discharge head.
S 434-044
(10)
Install the ground strap to the ground lugs, if it was removed.
NOTE:____Ground straps are not installed on all airplanes. Some fire extinguishing bottles are grounded through the bottle mounting flange.
S 434-047
(11) Install the electrical connector to the applicable bottle pressure switch. Refer to Table 401.
G. Squib Electrical Connection Procedure
NOTE: Do this procedure each time you connect an electrical connector to
____
a fire bottle squib.
S 434-119
(1) Do the steps that follow to connect an electrical connector to a fire bottle squib.
(a) If a protective cover is installed, remove the protective cover.
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CAUTION: IF A SHUNT PLUG IS INSTALLED, PULL THE SHUNT PLUG STRAIGHT
_______ OFF THE FIRE BOTTLE SQUIB. IF YOU TWIST OR WIGGLE THE SHUNT PLUG, YOU CAN CAUSE DAMAGE TO THE SQUIB PINS.
(b) If a shunt plug is installed, pull the shunt plug straight off the squib and discard the shunt plug.
NOTE: Shunt plugs should not be used to cover the fire bottle
____ squibs because they can cause damage to the squib pins.
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.
(c) Make sure there is no voltage between pins 1 and 2 of the electrical connector.
NOTE: Connect a 10 kohm resistor across the meter leads to
____ remove any stray voltage from the electrical connector.
(d)
Make sure the squib pins are not bent or damaged.
(e)
Make sure the electrical connector is not damaged.
NOTE: The squib pins can cause damage to the connector if
____ the pins do not enter the electrical connector receptacles.
(f)
Connect the electrical connector to the fire bottle squib.
(g)
Do the steps that follow to make sure you did not bend or damage the squib pins.
NOTE: This step is necessary because the pins are most likely
____ to be damaged the first time an electrical connector is connected to the squib.
1) Disconnect the electrical connector from the fire bottle squib.
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2) Make sure the squib pins are not bent or damaged. 3) Make sure the electrical connector is not damaged.
NOTE: The squib pins can cause damage to the connector
____ if the pins do not enter the electrical connector receptacles.
4) Connect the electrical connector to the fire bottle squib.
H. Connect the squib electrical connectors to fire extinguisher bottle 1, if applicable.
S 864-048
(1) Make sure these circuit breakers on the P6 panel are open:
(a)
6H1, FIRE EXTINGUISHING ENG L BTL 1
(b)
6H2, FIRE EXTINGUISHING ENG L BTL 2
(c)
6H3, FIRE EXTINGUISHING ENG R BTL 1
(d)
6H4, FIRE EXTINGUISHING ENG R BTL 2
S 434-120
(2)
Do the Squib Electrical Connection procedure to connect the
electrical connector, D2188, to the left squib of bottle 1.
S 864-050
(3)
Supply electrical power (AMM 24-22-00/201).
S 864-051
(4)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
(a) 6H1, FIRE EXTINGUISHING ENG L BTL 1
S 984-052
(5) Push and hold the TEST switch on the SQUIB TEST Control Panel, P61.
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