737 Flight Crew Operations Manual
Performance Inflight
Text
737-8/LEAP-1B27
FAA
CATB
MN-FLT-OH-201
PI.18.15
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Max Continuous %N1
Power setting is based on one engine operating with one A/C pack
operating and all anti-ice bleeds off. Enter the table with pressure altitude,
TAT, and IAS or Mach to read %N1. Power settings may be interpolated
for intermediate airspeeds. %N1 bleed corrections are provided per
pressure altitude.
It is desirable to maintain engine thrust level within the limits of the Max
Cruise thrust rating. However, where thrust level in excess of Max Cruise
rating is required, such as for meeting terrain clearance, ATC altitude
assignments, or to attain maximum range capability, it is permissible to use
the thrust needed up to the Max Continuous thrust rating. The Max
Continuous thrust rating is intended primarily for emergency use at the
discretion of the pilot and is the maximum thrust that may be used
continuously.
Gear Down
This section contains performance for airplane operation with the landing
gear extended for all phases of flight.
Note:
The Flight Management System (FMS) does not contain special
provisions for operation with landing gear extended. As a result, the
FMS will generate inaccurate enroute speed schedules, display
non-conservative predictions of fuel burn, estimated time of arrival
(ETA), maximum altitude, and compute overly shallow descent
path. An accurate estimated time of arrival is available if current
speed or Mach is entered into the VNAV cruise page. Estimates of
fuel remaining at waypoints or the destination may be computed by
the crew based on current fuel flow indications, but should be
updated frequently.
Tables for gear down performance in this section are identical in format
and used in the same manner as tables for the gear up configuration
previously described.
Gear Down, Engine Inoperative
This section contains performance for airplane operation with the landing
gear extended for use following an engine failure.
The caution provided in the Gear Down section for use of the FMS in a gear
down situation is still applicable.
October 26, 2021
