.
if an engine failure occurs during takeoff, the pitch command target speed is:
.
V2, if airspeed is below V2
.
existing speed, if airspeed is between V2 and V2 + 20
.
V2 + 20, if airspeed is above V2 + 20
YA686, YA687
.
the roll command maintains wings level.
YA613, YA626, YA721 - YK104
.
the roll command maintains HDG SEL. Bank angle is limited to 8 degrees below 400 feet, and 10–30 degrees selectable above 400 feet AGL.
After lift–off:
.
the A/T remains in THR HLD until 800 feet RA. A/T annunciation then changes from THR HLD to ARM and reduction to climb thrust can be made by pushing the N1 switch
YA721 - YC413, YK101 - YK104
.
automatic thrust reduction to climb power occurs when VNAV, ALT ACQ or ALT HOLD is engaged. Until 2 1/2 minutes after liftoff, automatic thrust reduction is inhibited when engaging LVL CHG or V/S modes
YA613 - YA687, YD651 - YD655
.
automatic reduction to climb thrust occurs upon reaching the selected thrust reduction altitude which is shown on the FMC CDU TAKEOFF REF page 2/2 during preflight, or when the airplane levels off in ALT HOLD or VNAV PTH. Pilot entries can be made to override the default value. Allowable entries are 800 feet to 9999 feet
.
flight director engaged status is terminated by engaging an autopilot in
CMD (CMD replaces FD in A/P status display)
.
pitch engages in LVL CHG and pitch mode FMA is MCP SPD unless another pitch mode has been selected
.
MCP IAS/Mach display and airspeed cursor change to V2 + 20 knots
Copyright . The Boeing Company. See title page for details.
4.20.10 September 29, 2005
Automatic Flight -System Description
. roll mode engages in HDG SEL unless another roll mode has been
selected. To terminate the takeoff mode below 400 feet RA, both F/D switches must be turned OFF. Above 400 feet RA, selection of another pitch mode or engaging an autopilot will terminate the takeoff mode; other F/D roll modes can be also selected.
Automatic Flight Takeoff Profile
YA686, YA687
Copyright . The Boeing Company. See title page for details.
September 29, 2005 4.20.11
Automatic Flight -System Description
YA613, YA626, YA721 - YK104
Engage A/P
.
A/P engages in CMD
.
Pitch mode
engages in
MCP SPD
Thrust Reduction
. A/T N1 mode
engages at
CLB power
800 ft RA –
. A/T ARM mode engages
84 knots –
. A/T THR HLD mode engages
Push TO/GASwitch
(both FD ON and A/T armed)
Automatic Flight En Route
The autopilot and/or the flight director can be used after takeoff to fly a lateral navigation track (LNAV) and a vertical navigation track (VNAV) provided by the FMC.
Other roll modes available are:
.
VOR course (VOR/LOC)
.
heading select (HDG SEL). Other pitch modes available are:
.
altitude hold (ALT HOLD)
.
level change (MCP SPD)
.
vertical speed (V/S).
Copyright . The Boeing Company. See title page for details.
4.20.12 March 28, 2005
Automatic Flight -System Description 737 Flight Crew Operations Manual
Automatic Flight Approach and Landing
The AFDS provides guidance for single A/P non–precision approaches. The VOR/LOC switch arms the AFDS for VOR or localizer tracking. Descent may be accomplished using VNAV, LVL CHG, or V/S. VOR/LOC, LNAV, or HDG SEL may be used for the roll mode.
The AFDS provides guidance for single or dual A/P precision approaches. The approach mode arms the AFDS to capture and track the localizer and glideslope.
Approach (APP) Mode Dual A/Ps
Approach mode allows both A/Ps to be engaged at the same time. Dual A/P operation provides fail–passive operation through landing flare and touchdown or an automatic go–around. During fail passive operation, the flight controls respond to the A/P commanding the lesser control movement. If a failure occurs in one A/P, the failed channel is counteracted by the second channel such that both A/Ps disconnect with minimal airplane maneuvering and with aural and visual warnings to the pilot.
One VHF NAV receiver must be tuned to an ILS frequency before the approach mode can be selected. For a dual A/P approach, the second VHF NAV receiver must be tuned to the ILS frequency and the corresponding A/P engaged in CMD prior to 800 feet RA.
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本文链接地址：737NG机组操作手册Flight Crew Operations Manual FCOM 2(91)
