737 Flight Crew Operations Manual
Performance Inflight - QRH Chapter PI-QRH
Text Section 14
737-300/CFM56-3_20K
CAA
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-4Q8-SJA PI-QRH.14.1
TextTextTextFile H ighlight
Introduction
This chapter contains information to supplement performance data from
the Flight Management Computer (FMC). In addition, sufficient inflight
data is provided to complete a flight with the FMC inoperative. In the event
of conflict between data presented in this chapter and that contained in the
Approved Flight Manual, the Flight Manual shall always take precedence.
General
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.
Recommended Maneuvering Speed
This table provides the flap speed schedule for recommended maneuvering
speed. The speed schedule is a function of weight and will provide
adequate maneuver margin above stall at all weights.
During flap retraction/extension, movement of the flap to the next position
should be initiated when reaching the maneuver speed for the existing flap.
Max Climb %N1
This table shows Max Climb %N1 for a 250 KIAS/280 KIAS/.74M climb
speed schedule, normal engine bleed for packs on (Auto) and anti-ice off.
Enter the table with airport pressure altitude and TAT and read %N1. Apply
the appropriate bleed setting %N1 adjustment shown below the table. %N1
adjustments are shown for engine bleed to packs off operation, packs high
operation, and wing anti-ice on.
December 20, 2018
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