FAN EXIT GUIDE VANES
CONE INLET STATOR 1ST-STAGE
(FAN) BLADE 1ST-STAGE
RUBSTRIP FRONT FAN CASE B FAN EXIT FAIRING
Engine Inlet, Exhaust, and Externals Inspection
Figure 601 (Sheet 1)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
NO. 4 TURBINE VANE COOLING AIR DUCT
NO. 3 TURBINE VANE FWD COOLING AIR DUCT
SEE E
C
EXHAUST PLUG OF THE TURBINE EXHAUST CASE OUTER DIAMETER DUCT AREA
SLEEVE EXHAUST D LPT BLADES 6TH-STAGE EXHAUST CASE AREA OF THE TURBINE INNER DIAMETER DUCT E STRUT CASE EXHAUST TURBINE PLUG REMOVED) OF THE TURBINE EXHAUST CASE INNER FLANGE (EXHAUST
L-A0615
Figure 601 (Sheet 2) Engine Inlet, Exhaust, and Externals Inspection
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SEE F
LPT CASE COOLING NO. 1 TURBINE VANE
MANIFOLDS COOLING AIR DUCT
CONTROL CABLE FOR THE
TURBINE CASE COOLING
LPT CASE COOLING AIR VALVE
AIR SHUTOFF VALVE
SEE G
FWD
LPT CASE COOLINGCOLLECTOR NO. 2 TURBINE VANE COOLING AIR DUCT
F
Engine Inlet, Exhaust, and Externals Inspection Figure 601 (Sheet 3)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
DAMAGED
VANE ARM
DISENGAGED
ASSEMBLED VANE
HPC VARIABLE VANE ARMS
L-A8655
Engine Inlet, Exhaust, and Externals Inspection Figure 601 (Sheet 4)
E23759
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No. 2 - Inlet, Exhaust, and Externals Inspection
________________________________________________
S 496-313-N00
WARNING: DO NOT GO INTO THE ENGINE INLET TO DO AN INSPECTION IF THE FAN
_______ BLADES ARE WINDMILLING. THE AIR FROM THE WIND THAT FLOWS THROUGH THE ENGINE CAN CAUSE THE FAN BLADES TO TURN. TO MAKE THE ENGINE SAFE, YOU MUST DO THE STEPS THAT FOLLOW TO STOP THE AIR FLOW THROUGH THE ENGINE. IF YOU DO NOT OBEY THESE INSTRUCTIONS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
If the engine is windmilling because of high ground winds, do one of the steps that follow to stop the engine:
(a)
Move the airplane into the hangar, out of the wind, to do the inspection.
(b)
Turn the airplane heading 90 degrees to the wind heading.
NOTE: When you turn the airplane, the wind will hit the
____ side of the airplane, and will not flow through the engine.
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