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go-around configuration and performance required to reach an alternate airfield.
Hydraulic System(s) Inoperative - Landing
If the landing gear is extended using the alternate gear extension, the gear cannot
be raised. Flaps can be extended or retracted using the alternate flap drive system.
However, the rate of flap travel is significantly reduced.
Flaps 20 and an adjusted VREF are used for landing with multiple hydraulic
systems inoperative to improve flare authority, control response and go-around
capability. The airplane may tend to float during the flare. Do not allow the
airplane to float. Fly the airplane onto the runway at the recommended point.
October 31, 2004
767 Flight Crew Training Manual
Non-Normal Operations
Copyright © The Boeing Company. See title page for details.
FCT 767 (TM) 8.19
If nose wheel steering is inoperative and any crosswind exists, consideration
should be given to landing on a runway where braking action is reported as good
or better. Braking action becomes the primary means of directional control below
approximately 60 knots where the rudder becomes less effective. If controllability
is satisfactory, taxi clear of the runway using differential thrust and brakes.
Continued taxi with nose wheel steering inoperative is not recommended due to
airplane control difficulties and heat buildup in the brakes.
Landing Gear
Tire Failure during or after Takeoff
If the crew suspects a tire failure during takeoff, the ATS facility serving the
departing airport should be advised of the potential for tire pieces remaining on
the runway. The crew should consider continuing to the destination unless there is
an indication that other damage has occurred (non-normal engine indications,
engine vibrations, hydraulic system failures or leaks, etc.).
Continuing to the destination will allow the weight to be reduced normally, and
provide the crew an opportunity to plan and coordinate their arrival and landing
when the workload is low.
Considerations in selecting a landing airport include, but are not limited to:
• sufficient runway length and surface conditions to account for the
possible loss of braking effectiveness
• sufficient runway width to account for possible directional control
difficulties
• altitude and temperature considerations that could result in high ground
speeds on touchdown and adverse taxi conditions
• runway selection options regarding "taxi-in" distance after landing
• availability of operator maintenance personnel to meet the aircraft after
landing to inspect the wheels, tires, and brakes before continued taxi
• availability of support facilities should the airplane need repair.
Landing on a Flat Tire
Boeing airplanes are designed so that the landing gear and remaining tire(s) have
adequate strength to accommodate a flat nose gear tire or main gear tire. When the
pilot is aware of a flat tire prior to landing, use normal approach and flare
techniques, avoid landing overweight and use the center of the runway. Use
differential braking as required to help with directional control. With a single tire
failure, towing is not necessary unless unusual vibration is noticed or other
failures have occurred.
October 31, 2004
767 Flight Crew Training Manual
Non-Normal Operations
Copyright © The Boeing Company. See title page for details.
8.20 FCT 767 (TM)
In the case of a flat nose wheel tire, slowly and gently lower the nose wheel to the
runway while braking lightly. Runway length permitting, use idle reverse thrust.
Autobrakes may be used at the lower settings. Once the nose gear is down,
vibration levels may be affected by increasing or decreasing control column back
pressure. Maintain nose gear contact with the runway.
Flat main gear tire(s) cause a general loss of braking effectiveness and a yawing
moment toward the flat tire with light or no braking and a yawing moment away
from the flat tire if the brakes are applied harder. Maximum use of reverse thrust
is recommended. Do not use autobrakes.
If uncertain whether a nose tire or main tire has failed, slowly and gently lower the
nose wheel to the runway and do not use autobrakes. Differential braking may be
required to help steer the airplane. Use idle or higher reverse thrust as required to
stop the airplane.
Note: Extended taxi distances or fast taxi speeds can cause a significant increase
in tire temperatures on the remaining tires.
Partial or Gear Up Landing
General
Land on all available gear. Recycling the landing gear in an attempt to extend the
remaining gear is not recommended. A gear up or partial gear landing is preferable
　
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