TM 1-1520-238-T-4
4–26
Change 7
4–7
SYSTEM DESCRIPTION (cont)
4–7
(c) Engine turbine speed is controlled by the turbine speed control unit. The speed control unit limits the
maximum turbine rpm of the engine. The speed control unit sends a signal to the ECU which signals the ECU to
control the flow of fuel to the engine.
M58-214A
ENGINE 2
SPINDLE
LOAD DEMAND
SPINDLE
AVAILABLE
POWER
SPINDLE
AVAILABLE
POWER
CABLES
CONTROL
FLEXIBLE
LEVER
PILOT POWER
LEVER
INPUT
COLLECTIVE
SERVOCYLINDER
COLLECTIVE
CPG POWER
HMU
ENGINE 1
HMU
Figure 4–18.
Engine Control System
4–8.
MULTIPLEX READ CODES
4–8
a. Power plants transmit engine 1 and engine 2 torque status to the fire control computer (FCC) via the
multiplex data bus (MUX) system.
b. Integrated in the MUX bus system is the fault detection/location system (FD/LS). FD/LS utilizes the CPG
data entry keyboard (DEK) (ADC) or control display unit (CDU) (ADD) for FD/LS command initialization and/or
FCC memory read code accessing.
