737 Operations Manual
Non-Normal Checklists -
Flight Controls
Copyright © The Boeing Company. See title page for details.
NNC.9.4 D6-27370-400E-TBCE
ALTERNATE FLAPS OPERATION
Condition: Flaps fail to extend or retract in response to flap lever
selection and no asymmetry is indicated.
Plan a flaps 15 landing.
Set VREF 15.
Note: Asymmetry protection is not provided when the
alternate extension system is used.
Plan for alternate flap extension.
[Alternate extension time to flaps 15 is approximately 2 minutes. When the
leading edge devices have been extended by the alternate system, they
cannot be retracted unless hydraulic system B is operational and normal
flap operation is restored. The drag penalty with the leading edge devices
extended may make it impossible to reach an alternate field.]
---------------------------- DEFERRED ITEMS ------------------------------
==> DESCENT - APPROACH
ANTI-ICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AS REQUIRED
AIR COND & PRESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SET
ALTIMETERS & INSTRUMENTS . . . . . . . . SET & X-CHECKED
N1 & IAS BUGS . . . . . . . . . . . . . . .CHECKED & SET, VREF 15
GROUND PROXIMITY FLAP
INHIBIT SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . .FLAP INHIBIT
Continued on next page
December 06, 2002
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