LEFT SIDE
Engine External Components Location
Figure 3 (Sheet 2)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
OVERRIDE PRESSURE SWITCH FOR THE IDG AIR/OIL HEAT EXCHANGER VALVE
SEE B
SEE A HPC SECONDARY FLOW CONTROL VALVE AND OVERRIDE SOLENOID FOR THE IDG AIR/OIL HEAT EXCHANGER VALVE (AMM 75-33-04)
HPC SECONDARY FLOW CONTROL VALVE AND TURBINE VANE AND BLADE COOLING AIR (TVBCA) VALVE SOLENOID (AMM 75-33-03) NO. 3 BEARING BUFFER AIR COOLER (AMM 75-22-01)
IDG AIR/OIL HEAT EXCHANGER AND VALVE (AMM 24-11-14)
ENGINE
AIR/OIL HEAT
STABILITY BLEED EXCHANGER
PNEUMATIC RELAY AND VALVE
VALVE
(AMM 79-21-09)
2.9 BLEED VALVE SOLENOID (AMM 75-32-04)
EEC SPEED TRANSDUCER (N1) (OPTIONAL NO. 1 BEARING
VIBRATION PICKUP) ACTUATOR 2.5 BLEED VALVE
ANGLE GEARBOX (AMM 73-21-06) (AMM 75-32-01) (AMM 72-62-01) INTERMEDIATE CASE L-A1184
(REAR VIEW)
A
Engine External Components Location
Figure 3 (Sheet 3)
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MANUAL CRANK PAD (REF)
FUEL BYPASS VALVE (73-11-07)
FUEL METERING UNIT (FMU) (73-21-01) OIL TANK (79-11-01)
MAIN OIL
FILTER ELEMENT
(79-21-05)
OIL
DRAIN
DEOILER
(REF)
IDG DRIVE PAD (REF)
MAIN GEARBOX (REF) LUBRICATION AND SCAVENGE OIL PUMP (79-21-04)
STARTER DRIVE PAD (REF)
HYDRAULIC PUMP DRIVE PAD (REF)
FUEL PUMP
(73-11-01)
L-A1185
MAIN GEARBOX
FWD
(BOTTOM VIEW)
B
Engine External Components Location
Figure 3 (Sheet 4)
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B
BCD DA AB
T
L-A0458
Engine Flange Identification
Figure 4
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12.5 13.0
STATION_______ DESCRIPTION___________
1.0 AMBIENT
2.0 FAN INLET INNER DIAMETER
2.5 LOW COMPRESSOR EXIT
3.0 DIFFUSER INLET - UPSTREAM OF DIFFUSER BLEED
PORTS AND DIVERGENT NOZZLE
3.5 COMBUSTOR
4.0 COMBUSTOR EXIT
4.5 HPT EXIT, LPT INLET TRANSITION DUCT
4.95 TURBINE EXHAUST CASE, TEMPERATURE AND PRESSURE
MEASURING PROBE LOCATION
5.0 TURBINE EXIT GUIDE VANE EXIT
12.0 FAN INLET OUTER DIAMETER
12.5 FAN EXIT - ROTOR TRAILING EDGE
13.0 FAN EXIT - UPSTREAM OF FAN EXIT GUIDE VANE
14.0 FAN EXIT GUIDE VANE EXIT
Designation of Engine Stations
Figure 5
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