BOMBARDIER BD-100-1A10, Operating Manual

Page: 522 / 544

POWERPLANT
Volume 2 Flight Crew Operating Manual May 06/2005
18-01-06
CSP 100-6
REV 2
ENGINE CONTROL SYSTEM (Cont)
GROUND IDLE
N
2
ground idle is the minimum thrust setting. It is selected when weight is on wheels and the thrust lever is idle. Ground
idle varies with altitude and temperature. Increases in altitude or ambient temperature result in an increase in N
2
idle rpm.
Decreases in altitude or ambient temperature result in a decrease in N
2
idle rpm.
REVERSE IDLE
When reverse idle is selected, reverse balk is activated by the FADEC. Further movement rearward beyond the REV detent
is restricted until the thrust reverser is fully deployed.
SINGLE ENGINE THRUST MANAGEMENT
The FADEC computers continuously crosstalk to share data on the health of each engine. The FADEC will automatically
activate the APR function on the operating engine, should the other engine fail, as long as the TLA is in the TO detent or
above and the APR has not been disabled by the crew.
The FADEC system monitors N
2
rpm of both engines. If the mismatch of N
2
speed exceeds 15%, the FADEC automatically
increases the N
1
speed of the operable engine.
AUTOMATIC POWER RESERVE
When an engine fails, the automatic power reserve (APR) feature of the FADEC will automatically increase the thrust for
the operating engine to the emergency thrust power setting of APR power.
Automatic Power Reserve is available when APR is armed during takeoff if the thrust levers are in the TO detent or above
and if APR has not been disabled by the crew. On the approach, APR is armed for the go-around when in approach config-
uration (either engine is available, flaps greater than 20
°
, or the landing gear is down).
APR power for both engines can also be selected by advancing both thrust levers to the APR stop. A cyan APR icon appears
to the right of each N
1
indicator.
ENGINE CONDITION AND FAULT REPORTING (ECFR)
An engine condition and fault reporting system is installed to provide monitoring of engine health. The system periodically
records engine parameters and allows the crew to request that conditions be recorded at anytime. Use of the system entails
downloading data from the FADEC for review by maintenance personnel. The data may be downloaded at anytime to assist
in diagnosing engine problems which may be encountered. The ECFR is intended for maintenance functions and in-flight
monitoring or diagnosis by maintenance personnel. The system is integrated into the FADEC of each engine.
ECFR EVENT SWITCH
The EVENT switch is located on the engine control panel. The switch allows the flight crew to manually initiate data col-
lection to the ECFR.