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-Cyan CLB thrust mode annunciation
CRUISE RANGE (CRZ)
Cruise power is unlike other thrust settings in that it is not associated with a thrust lever detent.
Cruise power is set by positioning the thrust lever in the quadrant range that exists between the IDLE and CLIMB detents. In this range, the pilot manually sets the thrust levers to maintain cruise speed or sets thrust for the descent and approach.
In cruise, FADEC does not set the cruise thrust to match the FADEC generated maximum cruise thrust target value. To distinguish maximum cruise power (CRZ) from other detent-related thrust settings, a cyan N1 doughnut is used instead of a caret.
Maximum cruise power (CRZ) is indicated by the following:
-Cyan doughnut
-Cyan N1 digital reference
-Cyan CRZ thrust mode annunciation
BLEED AIR EXTRACTION
When the thrust levers are in any of the detents and a new bleed air demand is placed on the engines, the N1 target rpm may change to compensate for the new bleed-air demands.
Volume 2 Flight Crew Operating Manual May 06/2005 CSP 100-6 REV 2
18-01-08 N1 AND N2 SYNCHRONIZATION
DESCRIPTION
OFF, N1, or N2, is selected with the AUTO SYNC switch, located on the ENGINE control panel. When SYNC (N1 or N2) is selected, the two engines are synchronized if the thrust levers are in the CRZ or CLB setting.
COMPONENTS AND OPERATION ENGINE SYNCHRONIZATION
When the AUTO SYNC selector switch is set to N1, the FADEC matches the fan speed of the slave engine to the speed of the master engine. The left and right engines will automatically designate themselves as master and slave engines using a cross-engine communication link. The engine with higher N1 compensation, or the left engine when N1 compensation of the two engines is the same, becomes the master engine. If the measured N1 or N2 of the slave engine is not within 5% of the master engine set point, the FADEC will provide an indication that synchronization is commanded but not achieved.
May 06/2005 Flight Crew Operating Manual Volume 2 REV 2 CSP 100-6
18-01-09 THRUST CALCULATIONS (Cont)
MACH HOLD
Mach hold is a function provided by FADEC that minimizes throttle movements over long periods during cruise. Limited adjustment is available to the master engine to hold the selected Mach. For MACH HOLD to be active, N1 or N2 must be synchronized, the aircraft trimmed for steady, level flight and the autopilot engaged in either Altitude Hold or Altitude Se-lect (with altitude captured).
Mach Hold authority only allows N1 to be adjusted within ± 3% N1 for the thrust lever position at the time MACH HOLD is active. When active, a green MACH HOLD will be displayed between the N1 indicators (on aircraft without SV 6.0 up-grade and FADEC V-10 software, the green light will flash momentarily, then extinguish). At authority limits, a white MACH HOLD is displayed .
ENGINE OIL SYSTEM
DESCRIPTION
The engine oil system provides cooling and lubrication for all of the engine bearings, gears and splines. It also provides fuel heating and shaft vibration damping (through the use of hydraulic mounts). The engine oil sump venting and breather system is also integral to the overall lubrication system.
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