(2)
Controls the engine thrust parameters with the thrust lever position

 (3)
Limits acceleration and deceleration

 (4)
Limits N1 and N2 rotor speed and burner pressure

 (5)
Controls variable stator vane (VSV) scheduling

 (6)
Controls bleed valve operation

 (7)
Controls HPC secondary flow

 (8)
Controls turbine blade and vane cooling

 (9)
Controls turbine case cooling

 (10)
 Controls engine oil cooling

 (11)
 Controls fuel temperature

 (12)
 Supplies servo fuel pressure for hydromechanical valves and actuators

 (13)
 Supplies engine indication and crew alerting data

 (14)
 Supplies system status and fault messages

 (15)
 Supplies automatic engine starting when used

 B.
The fuel control system includes the primary components that follow:

 (1)
Electronic engine control (EEC)

 (2)
Fuel metering unit (FMU)

 (3)
EEC alternator (N2 Transducer)

 (4)
EEC speed transducer (N1)

 (5)
EEC inlet total pressure/temperature (PT2/TT2) probe

 (6)
EEC programming plug

 (7)
Thermocouple probe for the EEC fuel temperature

 (8)
Thermocouple probe for the EEC oil temperature

 (9)
EEC thermocouple probe (TT3)

 (10)
 EEC wiring harnesses

 (11)
 Supplemental control unit (SCU)

 (12)
 SCU programming plug

 2.  Electronic Engine Control (EEC) (Fig. 1 and 2)
_______________________________
 A.  The EEC is a full authority, dual channel, digital, electronic engine control. It is installed, with vibration isolated mounts, on the fan case at the 1 o'clock position.
 B.  Each channel of the EEC (channel A and channel B) has its own proccessor, power supply, program memory, and input/output function.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A 
PLUG (J9DEP) EEC PROGRAMMING  J5A/F  ENGINE CONTROL ELECTRONIC (EEC) 
J2FCU J1A/F J3ENG  J8PWR J7ENG J6FCU 
J4PWR 
PB 
P5  PAMB PT2 
J1 
J2 J3 PLUG (J4) PROGRAMMING SCU SUPPLEMENTAL CONTROL UNIT (SCU) 
J5  PT2.5  FWD 
FAN CASE 

A
Fuel Control System Component Location Figure 1 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE B
SEE D (SHT 3)
SEE H (SHT 4)
DIFFUSER AND COMBUSTOR CASE
SEEC
FWD B
EEC THERMOCOUPLE PROBE (TT3)
C
Fuel Control System Component Location Figure 1 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
ELECTRICAL CONNECTORS 
FMU FUEL OUTLET 
SEE  F MAIN GEARBOX (REF)  FUEL PUMP  SEE D  E  FUEL METERING UNIT (FMU) FWD  UNIT FUEL METERING  FUEL PUMP 

EEC FUEL TEMPERATURE THERMOCOUPLE PROBE 
EEC WIRING HARNESS LUGS SEE  G  FWD 
PF SUPPLY PORT 
E 

FUEL FILTER HOUSING  F  FWD 
Fuel Control System Component Location Figure 1 (Sheet 3) 

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