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Altitude (MORA), or any other altitude based on terrain clearance, navigation aid
reception, or other appropriate criteria.
If severe turbulent air is encountered or expected, reduce to the turbulent air
penetration speed.
Autopilot Entry and Level Off
Flight Level Change (FLCH)
Because of airspeed and altitude protection and reduced crew workload, use of the
autopilot with FLCH mode is the recommended technique for rapid descents. Use
of the V/S or FPA mode is not recommended.
First set a lower altitude in the altitude window. Select FLCH, close the thrust
levers and smoothly extend the speedbrakes. Fly straight ahead or initiate a turn
using HDG/TRK SEL. If turn radius is a factor, the pilot should manually select
the desired bank angle required to complete the maneuver in a safe manner.
Autothrottles should be left engaged. The airplane pitches down smoothly while
the thrust levers retard to idle. Adjust the speed as needed and ensure the altitude
window is correctly set for the level off. During descent, the IAS/MACH speed
window changes from MACH to IAS at approximately 310 KIAS. Manually reset
to VMO as needed.
When approaching the target altitude, ensure the altitude is set in the MCP altitude
select window. Altitude capture engages automatically. Adjusting the command
speed to approximately LRC or 300 knots before level-off aids in smoothly
transitioning to level flight. The pitch mode then controls altitude and the thrust
levers increase to hold speed. Smoothly return the speedbrake lever to the down
detent during the level off maneuver.
When descending with the autopilot engaged and the speedbrakes extended at
speeds near VMO/MMO, the airspeed may momentarily increase to above
VMO/MMO if the speedbrakes are retracted quickly. To avoid this condition,
smoothly and slowly retract the speedbrakes to allow the autopilot sufficient time
to adjust the pitch attitude to maintain the airspeed within limits.
October 31, 2006
777/787 Flight Crew Training Manual
Maneuvers
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 7.9
When the speedbrakes are retracted during altitude capture near VMO/MMO, a
momentary overspeed condition may also occur. This is because the autopilot
captures the selected altitude smoothly by maintaining a fixed path while the
thrust is at or near idle. To avoid this condition, it may be necessary to reduce the
selected speed and/or descent rate before altitude capture or reduce the selected
speed and delay speedbrake retraction until after level off is complete.
Manual Entry and Level Off
The entry may be accomplished on heading or a turn may be made to clear the
airway or controlled track. However, since extending the speedbrakes initially
reduces the maneuver margin, it is recommended that turns not be initiated until
the airplane is established in the descent.
To manually fly the maneuver, disconnect the autothrottles and retard thrust levers
to idle. Smoothly extend the speedbrakes, disconnect the autopilot and smoothly
lower the nose to initial descent attitude (approximately 10 degrees nose down).
About 10 knots before reaching target speed, slowly raise the pitch attitude to
maintain target speed. Keep the airplane in trim at all times. If MMO/VMO is
inadvertently exceeded, change pitch smoothly to decrease speed.
Approaching level off altitude, smoothly adjust pitch attitude to reduce rate of
descent. The speedbrake lever should be returned to the down detent when
approaching the desired level off altitude. After reaching level flight add thrust to
maintain long range cruise or 300 knots.
Landing Gear Extended Descent
The rapid descent is normally made with the landing gear up. However, when
structural integrity is in doubt and airspeed must be limited, extension of the
landing gear may provide a more satisfactory rate of descent.
If the landing gear is to be used during the descent, comply with the landing gear
placard speeds.
After Level Off
Recheck the pressurization system and evaluate the situation. Do not remove the
crew oxygen masks if cabin altitude remains above 10,000 feet. Determine the
new course of action based on weather, oxygen, fuel remaining, medical condition
of crew and passengers, and available airports. Obtain a new ATC clearance.
October 31, 2006
777/787 Flight Crew Training Manual
Maneuvers
Copyright © The Boeing Company. See title page for details.
7.10 FCT 777/787 Preliminary (TM)
Stall Recovery
The objective of the stall protection demonstration is to familiarize the pilot with
stall warning and the correct recovery technique for conditions that are
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787机组训练手册Flight Crew Training Manual 787(111)
