E. Prepare for Test
S 865-161
(1) Open these circuit breakers on the P6 panel and attach DO-NOT-CLOSE tags:
(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
F. Test Fire Extinguisher Discharge Lines (Figure 502)
S 435-071
(1)
On the left and right engine struts, cap the nozzles (2) with the clamp or plug from the test equipment (figure 502).
S 025-072
(2)
Disconnect the left engine discharge line at bottle 1.
S 485-073
(3)
Install the regulator from the test equipment, and pressure gage to the discharge line.
(4)
Disconnect the left engine discharge line at bottle 2.
(5)
Install the plug in the bottle 2 discharge line.
S 025-074
S 025-225
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MAINTENANCE MANUAL
PRESSURE
GAGE
REGULATOR
ASSEMBLY
TO AIR
TO AIR SUPPLY
SUPPLY
ASSEMBLY REGULATOR PLUG GAGE PRESSURE
PLUG
FIRE BOTTLES
LEFT ENGINE TEST RIGHT ENGINE TEST
(AFT CARGO COMPARTMENT)
SEE A
ENGINE AND STRUT CLAMP AND
(LEFT OR RIGHT) PLUG ASSEMBLY
A
Pressure Test Setup
Figure 502
G02788
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S 485-075
(6) Connect the dry air source to the regulator.
S 785-206
CAUTION:_______APPLY PRESSURE ONLY TO TUBING. DO NOT PRESSURIZE THE FIRE BOTTLES. DAMAGE TO DISCHARGE PORTS CAN OCCUR.
(7)
Apply 50 |5 psig pressure to the left engine discharge line until the air pressure becomes stable.
S 785-077
(8)
Isolate the air pressure supply from the left engine discharge line.
S 785-078
(9)
After 2 minutes, make sure that the left engine discharge line pressure does not decrease more than 1 psig.
S 785-079
(10)
Release the air pressure from the regulator.
S 865-162
(11)
Remove the regulator and plug, and connect the left engine discharge lines to fire bottles 1 and 2.
S 085-226
(12)
Remove the clamp or plug from the distribution nozzles.
S 785-080
(13)
Do the above steps again for the right engine discharge line.
S 435-086
(14)
Connect the right engine discharge lines to fire bottles 1 and 2.
G. Put the Airplane Back to Its Usual Condition.
S 865-082
(1) Make sure these circuit breakers on the P6 panel are closed:
(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
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MAINTENANCE MANUAL
ENGINE FIRE EXTINGUISHER BOTTLE/DISCHARGE CARTRIDGE - REMOVAL/INSTALLATION 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 防火 FIRE PROTECTION 2(18)
