737 Flight Crew Operations Manual
Performance Inflight
Text
737-800WSFP1/CFM56-7B26
FAA
Category C/N Brakes
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
PI.17.6 D6-27370-866-EGP
To find the maximum allowable assumed temperature enter the Maximum
Assumed Temperature table with airport pressure altitude and OAT.
Compare this temperature to that at which the airplane is performance
limited as determined from available takeoff performance data. Next, enter
the Maximum Takeoff %N1 table with airport pressure altitude and the
lower of the two temperatures previously determined, to obtain a maximum
takeoff %N1. Do not use an assumed temperature less than the minimum
assumed temperature shown. Enter the %N1 Adjustment table with OAT
and the difference between the assumed and actual OAT to obtain a %N1
adjustment. Subtract the %N1 adjustment from the maximum takeoff %N1
found previously to determine the assumed temperature reduced thrust
%N1.
Apply %N1 adjustments as provided when applicable.
Max Climb %N1
This table shows Max Climb %N1 for a 280/.78 climb speed schedule,
normal engine bleed for packs on or off and anti-ice off. Enter the table
with airport pressure altitude and TAT and read %N1. %N1 adjustments are
shown for anti-ice operation.
Go-around %N1
To find Max Go-around %N1 based on normal engine bleed for packs on
(AUTO) and anti-ice on or off, enter the Go-around %N1 table with airport
pressure altitude and reported OAT or TAT and read %N1. For packs OFF
or HIGH operation, apply the %N1 adjustment shown below the table.
Flight with Unreliable Airspeed / Turbulent Air Penetration
Pitch attitude and average %N1 information is provided for use in all
phases of flight in the event of unreliable airspeed/Mach indications
resulting from blocking or freezing of the pitot system. Loss of radome or
turbulent air may also cause unreliable airspeed/Mach indications. The
cruise table in this section may also be used for turbulent air penetration.
Pitch attitude is shown in bold type for emphasis since altitude and/or
vertical speed indications may also be unreliable.
September 15, 2016
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