CFM56-7B ENGINE TEST TRAINING MANUAL 发动机测试培训手册(9)

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(g) Carefully monitor the oil pressure until the engine becomes stable at minimum idle. (13 psid (90 kPa) min. indicated at idle)
1 You must get a positive indication of oil pressure before 2000 rpm (N2).
2 High oil pressure can occur in cold weather because of high oil viscosity. When the temperature of the oil increases, the oil pressure decreases.
3 If the oil pressure is not in the limits after the oil temperature becomes stable, stop the engine and do troubleshooting.
General - 72-00-00-13-000
2011-4-9 CFMI PROPRIETARY INFORMATION : Subject to the restrictions on the Page 2 24
Training Material
CFM56-7B Engine Testing
Power Setting Procedures
A. Set all power settings to the N1 referenced in the engine manual, or as limited by EGT.
B. Move the throttle slowly and smoothly when you set the power. Move the throttle quickly only when it is specified in a procedure.
C. Let the engine become stable at idle power:
1) After an engine start, let the engine be stable at minimum idle for a minimum of 5 minutes before you try to operate at a higher power setting.
2) After a deceleration from higher power to minimum idle, let the engine be stable at minimum idle for a minimum of 5 minutes before you return to higher power or do a shutdown procedure.
D. Use a minimum of one minute to move the throttle from minimum idle to maximum continuous power or higher unless given different instructions.
E. Use these procedures when you move the throttle during decelerations:
1) Use a minimum of one minute to move the throttle when you decelerate to minimum idle from stable operation (more than 20 seconds) at or above maximum continuous power.
2) You can make a short (one second) deceleration to minimum idle from nonstabilized operation (not greater than 20 seconds) at conditions up to take-off power.
General - 72-00-00-13-000
2011-4-9 CFMI PROPRIETARY INFORMATION : Subject to the restrictions on the Page 2 25
Training Material
CFM56-7B Engine Testing
Shutdown Procedure
A. If you used high power settings, operate the engine at minimum idle for 5 minutes to permit the engine to become cool.
B. Set these controls and monitor these parameters:=
1) Set the Throttle Lever to IDLE.
2) Set the Master Lever to OFF.
3) Set the Mode Selector to NORMAL.
4) Set the Manual Start Switch to OFF.
CAUTION: MAKE SURE THE EGT CONSTANTLY DECREASES TO PREVENT DAMAGE TO THE ENGINE.
5) Carefully monitor the EGT. If it does not decrease (or if you get a tailpipe fire) motor the engine until the fire stops.
6) Monitor the N2 speed.
7) Monitor the fuel flow indication to make sure the fuel flow stops.
8) Set the fuel supply to OFF.
CAUTION: DRY-MOTOR THE ENGINE FOR THE SPECIFIED TIME TO PREVENT ENGINE DAMAGE.
9) Dry-motor the engine for a minimum of 2 minutes after the core stops. Or, dry-motor the engine until the EGT is less than 100
　
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