CAUTION: DO NOT USE SILICONE BASE OILS IN THE FUEL SYSTEM.
_______ SILICONE BASE OILS CAN CAUSE DAMAGE TO THE FUEL SYSTEM.
(n)
Connect a temporary line from the cart or the pump to the fuel pump inlet to supply oil (CP2850) at 50 psi (345 kPa) maximum pressure.
(o)
Disconnect the PCR line from the port on the top of the main engine control (MEC).
(p)
Connect a temporary drain line from the PCR port and from the disconnected line to a 10 gallon (40 liter) capacity container approved for fuel.
(q)
Disconnect the discharge pressure (CDP) line of the compressor from the port on the aft end of the MEC.
(r)
Connect a nitrogen cart or a clean air or nitrogen supply source, with a controlled pressure of 0-150 psi (0-1035 kPa), to the CDP port.
NOTE: Do not apply pressure to the CDP port at this time.
____
(s)
Install a cap on the CDP line.
(t)
Apply and hold an oil pressure of 50 psi (345 kPa) maximum to the fuel pump inlet.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-03
ALL ú ú C01 Page 215 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
WARNING:_______USE AMM 71-00-00/201 TO OPERATE THE POWER PLANT. IF YOU DO NOT USE THIS PROCEDURE, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT OR INJURY TO PERSONS.
DO NOT APPLY BOOST PUMP PRESSURE TO THE FUEL PUMP INLET DURING THE DRY MOTOR PROCEDURE. FUEL LEAKAGE CAN OCCUR AND CAUSE DAMAGE TO THE EQUIPMENT OR INJURY TO PERSONS.
(u) Use the Power Plant Dry-Motor procedure to motor the engine at the maximum motor speed (20% N2 minimum) for 4 minutes (AMM 71-00-00/201). 1) Do not apply boost pump pressure to the fuel pump inlet.
NOTE: Because the engine fuel supply line has been
____ disconnected and capped, fuel boost pump pressure can cause the cap on the supply line to come off and fuel to spill on the engine.
(v)
Use the Power Plant Dry-Motor procedure to do the engine shutdown (AMM 71-00-00/201).
(w)
Remove the pressure from the oil supply line to the fuel pump inlet.
(x)
If the fan rotor did not turn during the engine motor procedure, make sure the engine is fully stopped and manually turn the fan rotor two full turns as follows: 1) Install protective mats in the inlet on the full lower half
of inlet cowl.
WARNING: YOU MUST HAVE COMMUNICATION BETWEEN THE PERSONS IN
_______ FLIGHT COMPARTMENT AND PERSONS THAT MANUALLY TURN THE FAN ROTOR AT ALL TIMES. ACCIDENTAL OPERATION OF THE ENGINE OR ENGINE SYSTEMS CAN CAUSE INJURY TO PERSONS NEAR THE ENGINE.
THE ENGINE MUST BE FULLY STOPPED BEFORE YOU TRY TO GO INTO THE INLET TO MANUALLY TURN THE FAN ROTOR. IF THE ENGINE IS NOT FULLY STOPPED, INJURY CAN OCCUR.
WARNING: DO NOT TRY TO MANUALLY TURN THE FAN ROTOR WITHOUT
_______
GOOD GLOVES.
MAKE SURE YOU ARE ON A SAFE SURFACE WHILE YOU TURN THE FAN.
BE VERY CAREFUL WHILE YOU TURN THE FAN TO PREVENT INJURY.
2) Manually turn the fan two full turns in the direction of
operation (counterclockwise viewed from front).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-03
ALL ú ú C01 Page 216 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
3) Remove the mats from the inlet cowl.
(y)
Remove the drain line from the PCR port and disconnected PCR line.
(z)
Connect the PCR line to the PCR port. 1) Tighten the coupling nut to 65-75 pound-inches (7.3-8.5 Newton meters). (aa) Apply and hold an oil pressure of 50 psi (345 kPa) maximum to the fuel pump inlet.
(ab) Apply and hold a pressure of 150 psi (1035 kPa) at the CDP port.
WARNING:_______USE AMM 71-00-00/201 TO OPERATE THE POWER PLANT. IF YOU DO NOT USE THIS PROCEDURE, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT OR INJURY TO PERSONS.
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