(g)
At the ground pressure source, stop the supply of nitrogen.
(h)
On the manometer, after 5 minutes make sure that there is no decrease in pressure.
(i)
Release the pressure from the FWD cargo-compartment distribution line.
(j)
Disconnect the ground pressure source and the manometer from the flexible hose for the FWD cargo-compartment.
(k)
Put a blanking plug, MS21913-10, on the flexible hose for the FWD cargo-compartment.
(l)
Remove the blanking plug from the flexible hose for the AFT cargo-compartment.
(m)
Connect the ground pressure source together with the manometer to the flexible hose for the AFT cargo-compartment.
(n)
Do the step (2)(a) through (2)(l) again for the AFT cargo-compartment.
(o)
At the fire-extinguisher bottle 4005WX, remove the protection caps from the discharge head outlet ends.
(p)
Apply Grease
CAUTION : APPLY A SMALL QUANTITY OF THE CORRECT GREASE TO THE
_______ MALE THREADS OF THE CONNECTIONS. THIS WILL PREVENT DAMAGE TO THE THREADS. MAKE SURE THAT GREASE DOES NOT GO INTO THE PIPES. GREASE IN THE PIPES CAN CAUSE A MALFUNCTION OF THE SYSTEM.
Apply a small quantity of COMMON GREASE (Material No. 04-023) on the first three threads of the male connections.
(q)
Connect the flexible hoses to the discharge head outlet ends.
(r)
In the FWD and in the AFT cargo-compartment, at the discharge outlets, remove the blanking caps.
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(s) Install the spray nozzles.
R **ON A/C 401-499,
R Subtask 26-23-00-210-050-A
R A. Do a check of the Cargo-Compartment Fire-Extinguishing
R Distribution-Piping for Leakage and Obstruction.
R (1) Connect the ground pressure source (nitrogen), MISCELLANEOUS
R (Material No. 19-014), to the flexible hoses of the fire-extinguisher
R bottle 4015WX.
R (a) At the fire-extinguishing bottle 4015WX, disconnect the flexible
R hoses from the FWD COMPT and the AFT COMPT discharge head outlet
R ends.
R (b) Put protection caps on the discharge head outlet ends.
R (c) Put a blanking plug, MS21913-10, on the flexible hose for the AFT
R cargo-compartment.
R (d) Use an applicable adaptor to connect the ground pressure source
R together with the manometer 0 to 4 bar (58 psi) to the flexible
R hose for the FWD cargo-compartment.
R (2) Do a check of the distribution piping of the fire-extinguisher bottle
R 4015WX.
R (a) Operate the ground pressure source and pressurize the FWD
R cargo-compartment distribution lines to approx. 3.0 bar (43.5
R psi).
R (b) In the FWD cargo-compartment, make sure that there is good flow
R of nitrogen from the spray nozzle(s).
R NOTE : The nitrogen flows directly from the ground pressure____
R source to the spray nozzle(s).
R (c) Stop the supply of ground pressure.
R (d) In the FWD cargo-compartment, loosen the coupling nut(s) and
R remove the spray nozzle(s) from the discharge outlet(s).
R (e) Install blanking cap(s), MS21914-10, on the discharge outlet(s).
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R (f) Operate the ground pressure source and pressurize the FWD
R cargo-compartment distribution line to approx. 3.0 bar (43.5
R psi).
R (g) At the ground pressure source, stop the supply of nitrogen.
R (h) On the manometer, after 5 minutes make sure that there is no
R decrease in pressure.
R (i) Release the pressure from the FWD cargo-compartment distribution
R line.
R (j) Disconnect the ground pressure source and the manometer from the
R flexible hose for the FWD cargo-compartment.
R (k) Put a blanking plug, MS21913-10, on the flexible hose for the FWD
R cargo-compartment.
R (l) Remove the blanking plug from the flexible hose for the AFT
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