E. Discharge Tube Pressure Test
S 035-046
(1) Disconnect the discharge tubes from the discharge ports on the cargo fire bottle.
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A 737-300/400/500MAINTENANCE MANUAL
(2) S 485-047Connect a pressure source to the forward cargo discharge tube.
(3) S 485-048Install the plugs on the fire extinguishing nozzles in the forward cargo compartment.
(4) S 785-049Pressurize the fire extinguishing tubes to 50-55 psig. (a) Wait a minimum of 3 minutes for the air pressure to become stable.
(5) S 785-050Turn off the pressure source. (a) Make a record of the air pressure. (b) Wait 10 minutes, then measure the pressure. 1) Make sure the pressure has not decreased by more than 0.5 psig.
(6) S 785-051Bleed the fire extinguishing tubes to 0 psi.
(7) S 085-052Disconnect the pressure source from the forward cargo discharge tubes.
(8) S 085-053Remove the plugs from the discharge nozzles in the forward cargo compartment.
(9) S 485-055Connect a pressure source to the aft cargo discharge tube.
S 485-056
(10)
Install the plugs on the fire extinguishing nozzles in the aft cargo compartment.
S 785-057
(11)
Pressurize the fire extinguishing tubes to 50-55 psig.
(a) Wait a minimum of 3 minutes for the air pressure to become stable.
S 785-058
(12) Turn off the pressure source.
(a)
Make a record of the air pressure.
(b)
Wait 10 minutes, then measure the pressure.
1) Make sure the pressure has not decreased by more than 0.5 psi.
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S 785-059
(13)
Bleed the fire extinguishing tubes to 0 psi.
S 085-060
(14)
Disconnect the pressure source from the aft cargo discharge tube.
S 085-061
(15)
Remove the plugs from the discharge nozzles in the aft cargo compartment.
S 435-062
(16)
Connect the discharge tubes to the discharge outlets on the bottle.
(a)
Apply a layer of compound, BMS 3-27 to the threads where the tube attaches to the discharge port.
(b)
Connect the tube to the discharge port.
NOTE: The yellow tube supplies extinguishant to the
____ forward cargo compartment. The blue tube supplies extinguishant to the aft cargo compartment.
(c)
Remove all unwanted compound, BMS 3-27.
(d)
Tighten the nut on the tube assembly.
F. Put the Airplane Back to its Usual Condition
S 415-063
(1)
Install the lining at the aft end of the forward cargo compartment.
S 415-064
(2)
Close the forward cargo door, 4404R.
TASK 26-23-00-705-094
7. Cargo Fire Extinguishing Bottle Squib Circuit Alternate Test
____________________________________________________________
A. General
_______
(1) The squib circuit test should be performed every time the Cargo Fire Control Panel, ir a fire bottle is disconnected from the airplane wiring.
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本文链接地址：737-300 400 500 AMM 飞机维护手册 防火 FIRE PROTECTION(137)
