737 Flight Crew Operations Manual
Supplementary Procedures -
Adverse Weather
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP SP.16.19
Brake temperature levels may be reached which can cause the wheel fuse
plugs to melt and deflate the tires. Consider the following actions:
• Be aware of brake temperature buildup when operating a series of
short flight sectors. The energy absorbed by the brakes from each
landing is accumulative
• Extending the landing gear early during the approach provides
additional cooling for tires and brakes.
• In–flight cooling time can be determined from the “Brake Cooling
Schedule” in the Performance–Inflight section of the QRH.
During flight planning consider the following:
• High temperatures inflict performance penalties which must be
taken into account on the ground before takeoff
• Alternate takeoff procedures (No Engine Bleed Takeoff, Improved
Climb Performance, etc.)
Moderate to Heavy Rain, Hail or Sleet
Flights should be conducted to avoid thunderstorm or hail activity. If
visible moisture is present at high altitude, avoid flight over the storm cell.
(Storm cells that do not produce visible moisture at high altitude can be
overflown safely.) To the maximum extent possible, moderate to heavy
rain, hail or sleet should also be avoided.
If moderate to heavy rain, hail or sleet is encountered or anticipated:
ENGINE START switches ..................................................CONT
Autothrottle ...................................................................Disengage
Thrust Levers.......................................................... Adjust Slowly
If thrust changes are necessary, move the thrust levers slowly.
Avoid changing thrust lever direction until engines have
stabilized at a selected setting. Maintain an increased minimum
thrust setting.
IAS/MACH .....................................................Use a slower speed
Using a slower speed improves engine tolerance to heavy
precipitation intake.
Consider starting the APU (if available).
September 15, 2016
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