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N2 SYNC ON EPR CMD SYNC ON A/T ON A/T OFF T/O Phase Trim activates when both thrust levers are set to a position corresponding to a thrust setting greater than 60% maximum thrust.Trims to higher of two EPR CMDs from FADEC’s. Trims to T/O EPR setting when within trim authority range. T/O Phase No active trim command. Trim commands are zeroed. Cruise Phase N2 Sync performed as thrust levers are moved between the active cruise rating and flight idle rate settings.Trimming to the computed A/T EPR. Cruise Phase N2 Sync performed as thrust levers are moved between the active cruise rating and flight idle rate settings. Approach Phase Trimming to the computed A/T EPR. Approach Phase No active trim commands. Trim commands are zeroed. GA Phase Trims to higher of two EPR CMDs. Trims to GA EPR setting when within range of GA EPR rating. GA Phase No active trim commands. Trim commands are zeroed. A/T ON A/T OFF T/O Phase Trim activates when both thrust levers are set to a position corresponding to a thrust setting greater than 60% maximum thrust.Trims to higher of two EPR CMDs from FADEC’s. Trims to T/O EPR setting when within trim authority range. T/O Phase Trim activates when both thrust levers are set to a position corresponding to a thrust setting greater than 60% maximum thrust.Trims to higher of two EPR CMDs from FADEC’s. Trims to T/O EPR setting when within trim authority range. Cruise Phase Trimming to the computed A/T EPR. Cruise Phase Trimming to the average of the two EPR CMDs. Approach Phase Trimming to the computed A/T EPR. Approach Phase Trimming to the average of the two EPR CMDs. GA Phase Trims to higher of two EPR CMDs. Trims to GA EPR setting when within trim authority range. GA Phase Trims to higher of two EPR CMDs. Trims to GA EPR setting when within trim authority range. For Training Purposes Only Sept 04 17-55 P I LOT T R A I N I N G GU I D E POWER PLANT N1, N2, EPR CMD SYNC OFF The phase of flight is determined by the electronic trim system and is based on the A/ T mode, as well as the active autopilot/flight director pitch mode. The electronic trim system will hold trim commands at 60 knots during T/O roll in order to prevent undesirable thrust changes during T/O phase between 60 knots and 400 feet. The trim commands cannot be changed, including deselection, until the airplane transitions 400 feet above ground level. SYNC ANNUNCIATION A SYNC annunciation will be displayed on N1 or N2 or EPR, when the sync system is engaged and is issuing electronic trim commands. There will be no SYNC annunciation while: • A/T is engaged with EPR CMD sync selected • A/T is not engaged during T/O or approach phase with EPR CMD sync selected The engine trim control is not available for the following conditions: • Engine out condition • While an engine is in reversionary control (N1 control) • While data, required for control, is invalid A/T ON A/T OFF T/O Phase Trim activates when both thrust levers are set to a position corresponding to a thrust setting greater than 60% maximum thrust.Trims to higher of two EPR CMDs from FADECs. Trims to T/O EPR setting when within trim authority range. T/O Phase No active trim command. Trim commands are zeroed. Cruise Phase Trimming to the computed A/T EPR. Cruise Phase No active trim command. Trim commands are zeroed. Approach Phase Trimming to the computed A/T EPR. Approach Phase No active trim command. Trim commands are zeroed. GA Phase Trims to higher of two EPR CMDs. Trims to GA EPR setting when within range of GA EPR rating. GA Phase No active trim command. Trim commands are zeroed. GX_17_017 EPR SYNC N2 93.4 START START 93.4 N1 SYNC SYNC 17-56 For Training Purposes Only Sept 04 P I LOT T R A I N I N G GU I D E POWER PLANT A/T 1 OR 2 SELECT AUTOTHROTTLE channel is automatically selected. To manually change the selection, select MENU twice on the MFD control panel, then select AUTOTHROTTLE 1 or 2 and select ENT. NOTE Unlike the autopilot computers, there is no automatic transfer between Autothrottle Computer 1 and Autothrottle Computer 2. A manual reversion must be done via the MFD control panel. A/T ENGAGEMENT/DISENGAGEMENT A/T Engagement - The A/T system is engaged or armed to engage by toggling the A/T engage/disengage switch(es), located on either thrust lever. www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：庞巴迪挑战者手册10
