(b)
Write the voltage on the multimeter as (V1).
S 865-058
(8) Set the toggle switch on the test box to ON.
(a) Write the voltage on the multimeter as (V2).
S 865-059
(9) Release the handle.
(a)
Make sure the handle moves to center aproximately 10 degrees.
(b)
Make sure the multimeter shows 0 |2 volts.
S 865-060
(10) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
EXTINGUISHER BOTTLES LEFT
(b)
EXTINGUISHER BOTTLE LEFT
S 865-061
(11)
Disconnect connector D1322 from the adapter cable for the test box.
S 975-062
(12)
Calculate the resistance, Rc, for the squib discharge circuit using the following formula:
Rc = RL (V1/V2) - RL
(a) Make sure Rc is equal to or less than 3 ohms.
NOTE: If Rc is larger than 3 ohms, the circuit can not supply
____ sufficient current to fire the squib cartridge.
S 865-063
(13) Connect connector D1324 for squib 2 for the right extinguisher bottle to the adapter cable for the test box.
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A 737-300/400/500MAINTENANCE MANUAL
S 865-064
(14) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
EXTINGUISHER BOTTLES RIGHT
(b)
EXTINGUISHER BOTTLE RIGHT
S 865-065
(15) Turn and hold the fire handle for engine 2 fully clockwise.
(a)
Make sure the BOTTLE DISCHARGE light on the test box is on.
(b)
Write the voltage on the multimeter as (V1).
S 865-066
(16) Set the toggle switch on the test box to ON.
(a) Write the voltage on the mulitimeter as (V2).
S 865-067
(17) Release the handle.
(a)
Make sure the handle moves to center approximately 10 degrees.
(b)
Make sure the multimeter shows 0 |2 volts.
S 865-068
(18)
Set the toggle switch on the test box to OFF.
S 865-069
(19)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
EXTINGUISHER BOTTLES RIGHT
(b)
EXTINGUISHER BOTTLE RIGHT
S 865-070
(20)
Disconnect connector D1324 from the adapter cable for the test box.
S 975-071
(21)
Calculate the resistance, Rc, for the squib discharge circuit with this formula:
Rc = RL (V1/V2) - RL
(a) Make sure Rc is equal to or less than 3 ohms.
S 865-072
(22)
Push the fire handle for engine 2 to the fully latched position.
(23)
Remove the adapter cable from the squib test box.
S 865-074
(24)
Do steps (1) thru (23) again to examine the secondary fire extinguishing circuits.
S 015-073
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
H. Connect and do a check of the squib connections on the engine fire bottle.
S 865-075
(1) Make sure these circuit breakers on the P6-2 panel are closed:
(a)
EXTINGUISHER BOTTLES RIGHT
(b)
EXTINGUISHER BOTTLES LEFT
(c)
EXTINGUISHER BOTTLE RIGHT
(d)
EXTINGUISHER BOTTLE LEFT
S 865-076
(2) Make sure this circuit breaker on the P6-2 panel is open:
(a) EXTINGUISHER BOTTLE APU
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