TM 55-2840-251-23
Section VIII GENERAL MAINTENANCE PROCEDURES (Continued )
1-77 CLEANING (Cont)
3. Compressor Wash (Cont)
f.
Salt Removal Motoring Wash (Cont)
(2)
Fill rinse tank with prepared solution
(Refer to Table 4).
(3)
Pressurize tank 30 to 50 psi with air or
nitrogen supply.
(4)
Disconnect P3 air line from FCU (Task
10-4).
(5)
Insure that ignition switch is OFF.
(6)
Insure that compressor bleed air is off or
disconnected.
(7)
Fuel boost pump ON.
(8)
Throttle lever at idle.
(9) Shutoff lever in OFF position.
(10)
Open supply valve and inject rinse
solution.
(11)
Immediately commence motoring the
engine with the starter while injecting the fluid for a
period not to exceed 30 seconds.
CAUTION
Do not motor engine for more than 30
seconds. Observe starter cooling
period.
(12)
When Ng falls to 5%, close tank valve.
(13)
Observe starter cooling period.
(14)
If water/methanol solution has been used,
carry out a 30-second dry motoring run to purge the
engine of volatile fumes.
(15)
Remove wand or wash ring.
(16)
Switch ignition ON and start engine. Run
engine at 80% Ng for one minute or more to completely
dry the engine.
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