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Reverse Thrust Vector
Component
Side Force
• Touchdown
• Speedbrake up,
brakes on
• Initiate Reverse • Brakes Off
• Reverse Idle
• Straighten
• Roll Path
• Reapply Braking
• Apply
symmetrical
reverse thrust
October 31, 2006
777/787 Flight Crew Training Manual
Landing
Copyright © The Boeing Company. See title page for details.
6.42 FCT 777/787 Preliminary (TM)
Reverse Thrust - Engine Inoperative
Asymmetrical reverse thrust may be used with one engine inoperative. Use normal
reverse thrust procedures and techniques with the operating engine. If directional
control becomes a problem during deceleration, return the thrust lever to the
reverse idle detent.
777-200 - 777-300ER
Note: TAC does not operate during reverse thrust operation.
Crosswind Landings
The crosswind guidelines shown below were derived through flight test data,
engineering analysis and flight simulator evaluations. These crosswind guidelines
are based on steady wind (no gust) conditions and include all engines operating
and engine inoperative. Gust effects were evaluated and tend to increase pilot
workload without significantly affecting the recommended guidelines.
Landing Crosswind Guidelines
Crosswind guidelines are not considered limitations. Crosswind guidelines are
provided to assist operators in establishing their own crosswind policies.
On slippery runways, crosswind guidelines are a function of runway surface
condition. These guidelines assume adverse airplane loading and proper pilot
technique.
777-200 - 777-300ER
Runway Condition Crosswind Component
(knots) *
Dry 45 ***
Wet 40 ***
Standing Water/Slush 20
Snow - No Melting ** 35 ***
Ice - No Melting ** 17
October 31, 2006
777/787 Flight Crew Training Manual
Landing
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 6.43
787-8
Note: Reduce crosswind guidelines by 5 knots on wet or contaminated runways
whenever asymmetric reverse thrust is used.
*Winds measured at 33 feet (10 m) tower height and apply for runways 148 feet
(45m) or greater in width.
** Landing on untreated ice or snow should only be attempted when no melting
is present.
777-200 - 777-300ER
*** Sideslip only (zero crab) landings are not recommended with crosswind
components in excess of 31 knots (777-200) or 35 knots (777-300). This
recommendation ensures adequate ground clearance and is based on maintaining
adequate control margin.
787-8
*** Sideslip only (zero crab) landings are not recommended with crosswind
components in excess of TBD knots. This recommendation ensures adequate
ground clearance and is based on maintaining adequate control margin.
Crosswind Landing Techniques
Three methods of performing crosswind landings are presented. They are the
touchdown in a crab, the de-crab technique (with removal of crab in flare), and the
sideslip technique. Whenever a crab is maintained during a crosswind approach,
offset the flight deck on the upwind side of centerline so that the main gear touches
down in the center of the runway.
De-Crab During Flare
The objective of this technique is to maintain wings level throughout the
approach, flare, and touchdown. On final approach, a crab angle is established
with wings level to maintain the desired track. Just prior to touchdown while
flaring the airplane, downwind rudder is applied to eliminate the crab and align
the airplane with the runway centerline.
Runway Condition Crosswind Component
(knots) *
Dry TBD ***
Wet TBD ***
Standing Water/Slush TBD
Snow - No Melting ** TBD ***
Ice - No Melting ** TBD
October 31, 2006
777/787 Flight Crew Training Manual
Landing
Copyright © The Boeing Company. See title page for details.
6.44 FCT 777/787 Preliminary (TM)
As rudder is applied, the upwind wing sweeps forward developing roll. Hold
wings level with simultaneous application of aileron control into the wind. The
touchdown is made with cross controls and both gear touching down
simultaneously. Throughout the touchdown phase upwind aileron application is
utilized to keep the wings level.
Touchdown In Crab
The airplane can land using crab only (zero sideslip) up to the landing crosswind
guideline speeds. (See the landing crosswind guidelines table, this chapter).
On dry runways, upon touchdown the airplane tracks toward the upwind edge of
the runway while de-crabbing to align with the runway. Immediate upwind aileron
is needed to ensure the wings remain level while rudder is needed to track the
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787机组训练手册Flight Crew Training Manual 787(105)
