737 Operations Manual
Performance Inflight -
Text
737-500/CFM56-3_20K
Copyright © The Boeing Company. See title page for details.
D6-27370-400E-TBCE PI.36.11
Gear Down
This section contains performance for airplane operation with the landing
gear extended for all phases of flight. The data is based on engine bleeds
for normal air conditioning.
Note: The Flight Management Computer System (FMCS) does not contain
special provisions for operation with landing gear extended. As a result,
the FMCS 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. To obtain
accurate ETA predictions, gear down cruise speed and altitude should be
entered on the CLB and CRZ pages. Gear down cruise speed should also
be entered on the DES page. Use of VNAV during descent under these
circumstances is not recommended.
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.
December 06, 2002
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