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T SYSTEM - ENGINE DISPLAY A/T SYSTEM - ENGINE DISPLAY EFFECTIVITY SHZ ALL 22-31-00 Page 57 D633A101-SHZ1 Jun 10/2003 BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details. 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 22-31-00-018 General The A/T operates on the ground for takeoff, and during flight. The A/T system controls engine thrust for these flight sequences: * Takeoff * Climb * Cruise * Descent * Approach * Flare * Go-around. For each flight phase, the A/T N1 or speed modes may be selected from the MCP. If the DFCS is engaged, it selects the A/ T mode. The N1 or speed mode select switch light comes on to show the mode is active. When the light is on, a second push removes the mode from active status. You use the TO/GA switches to start the takeoff or go-around modes. A/T SYSTEM - OPERATION - OVERVIEW EFFECTIVITY SHZ ALL 22-31-00 Page 58 D633A101-SHZ1 Jun 10/2003 BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details. 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 22-31-00-019 A/T SYSTEM - OPERATION - OVERVIEW A/T SYSTEM - OPERATION - OVERVIEW EFFECTIVITY SHZ ALL 22-31-00 Page 59 D633A101-SHZ1 Jun 10/2003 BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details. 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 22-31-00-019 THIS PAGE IS INTENTIONALLY LEFT BLANK A/T SYSTEM - OPERATION - OVERVIEW 22-31-00 Page 60 D633A101-SHZ1 Oct 10/2002 BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details. 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL General To prepare the FMS and the A/T for takeoff, you use the FMC CDU to enter the necessary preflight data, and the DFCS MCP to select parameters and set desired modes. This is the takeoff sequence: * Preflight * Takeoff Start * Takeoff Roll * Climbout. Preflight These are the steps for preflight prior to takeoff: * To preflight the FMS, enter data on the FMC CDU * Set the DFCS MCP to takeoff modes and parameters * Put the A/T arm switch to the ARM position on the MCP. These are the indications after preflight is complete: * A/T is in ARM mode * A/T mode lights are off on the MCP * TO is the FMC thrust mode * N1 reference cursors are at FMC takeoff N1 limit. Takeoff Start At the start of the takeoff roll, the pilot pushes a TO/GA switch on the thrust levers. The A/T active mode becomes N1 for takeoff, and the A/T moves the thrust levers to the FMC calculated takeoff N1 limit. These are the indications at the start of takeoff: * A/T goes to N1 mode * N1 mode light is OFF * TO is the FMC thrust mode * N1 reference cursors are at FMC takeoff N1 limit * T/Ls move forward to a target TRA for the N1 limit. Takeoff Roll As engine thrust and RPM increase to the takeoff N1 limit, the airplane accelerates. When the airspeed gets to 80 kts, the A/T goes in to throttle hold mode. At 84 knots, the A/T mode changes from N1 to THR HLD on the FMA. These are the indications at 84 kts: * THR HLD shows on the FMA as the active A/T mode * TO shows on the TMA as the FMC thrust mode * N1 reference cursors are at FMC takeoff N1 limit. In throttle hold mode, the A/T removes power from the ASMs and does not command thrust. The T/Ls remain at the target TRA for the takeoff N1 limit. The pilot can control thrust manually if desired. A/T SYSTEM - OPERATION - TAKEOFF EFFECTIVITY SHZ ALL 22-31-00 Page 61 D633A101-SHZ1 Jun 10/2003 BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details. 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 22-31-00-020 Climb Out During the initial climb out, above a barometric altitude of 800 feet above field elevation and 10 seconds after liftoff, the A/T mode changes from THR HLD mode to ARM mode. These are the indications: A/T goes to * ARM mode * TO is the FMC thrust mode * N1 reference cursors are at FMC takeoff N1 limit * T/Ls remain at target TRA for takeoff N1 limit. After takeoff is complete, the pilot may select a new A/T mode from the MCP, either N1 or speed mode, when above 800 feet barometric altitude. If DFCS is engaged during climb out, DFCS selects an A/T mode, either N1 or Speed mode, consistent with the DFCS mode selected. During climb out above 800 feet baro altitude, the N1 or Speed mode light may be ON depending on the mode selected. A/T modes show on the FMA on the primary (outboard) EFIS www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737NGAMM2
