Embraer EMB145 - Page 1904

AIRPLANE
OPERATIONS
MANUAL
POWERPLANT
REVISION 41
2-10-50
Page
3
Code
01
Copyright © by Embraer. Refer to cover page for details.
AOM
-
145/1114
THRUST MANAGEMENT
This section of the FADEC software is responsible for functions directly
involved in the required thrust computation and management logic.
Thrust management logic is provided to reduce flight crew workload
and enhance the airplane’s operation.
Thrust management functions are as follows: thrust mode selection,
fan speed (N1) scheduling, Automatic Takeoff Thrust Control
(ATTCS), Takeoff Data Setting (TDS), and thrust reverser interlock.
THRUST MODE SELECTION
Thrust logic management includes several thrust-rating modes that are
controlled through associated buttons on the cockpit, set during the
takeoff data setting procedure, automatically triggered by the ATTCS
or by advancing the Thrust Lever Angle (TLA) above the THRUST SET
position.
Thrust-rating mode defines the available engine thrust at the existing
ambient conditions.
The following thrust modes are available:
ALTERNATE TAKEOFF (ALT T/O-1)
− All engines:
This mode is the normal all engines operating takeoff mode and
is available only through the use of the Takeoff Data Setting
procedure.
Selection of this mode ensures the best engine durability and
economy of operation. In this mode the ATTCS is active, so that
T/O-1 mode is triggered in case of engine failure.
MAXIMUM TAKEOFF-1 (T/O-1)
− A, A1, A1/1 and A3 engines:
This mode is the maximum, all engines operating takeoff mode.
For engine durability and economy of operation, this mode
should only be selected when ALT T/O-1 is not authorized. The
engine will produce the maximum rated thrust for the existing
ambient conditions in T/O-1 mode. This mode is automatically
selected when ATTCS is triggered during operation in
ALT T/O-1 mode. T/O-1 is automatically selected at FADEC
power up and at the initiation of the Takeoff Data Setting
procedure. T/O-1 is also automatically selected in flight below or
descending through 15000 ft provided the landing gear is down
and locked.