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Loss of System A pressure is indicated by the System A pressure at zero and
illumination of:
· MASTER CAUTION lights.
· FLT CONT and HYD annunciator lights.
· System A LOW PRESSURE lights.
· System A Flight Control LOW PRESSURE light.
· FEEL DIFF PRESS light.
System A Flight Control Switch ...................................................STBY RUD
This activates the standby pump; supplies pressure to the rudder power
control unit, arms the standby LOW PRESSURE light, and switches the flight
control LOW PRESSURE light to monitor standby rudder valve position.
(Continued)
HYDRAULICS
Sec. 2.13 Page 2
Rev. 11/15/02 #41
Continental
737
Flight Manual
System A Hydraulic Pumps ......................................................................OFF
· Ground spoilers, inboard flight spoilers, Autopilot A and alternate
brakes are inoperative. The No. 1 engine thrust reverser has standby
pressure.
· > Nose wheel steering is inoperative.
· >@BCD Normal nose wheel steering is inoperative.
· Plan for manual gear extension.
· When the gear has been lowered manually, it cannot be retracted.
· The drag penalty with gear extended may make it impossible to reach
an alternate field.
- - - - - PRIOR TO FINAL - - - - -
Landing Gear Lever...................................................................................OFF
Manual Gear Extension Handles .......................................................... PULL
The uplock is released when the handle is pulled to its limit, approximately
18 inches for the main gear and 8 inches for nose gear. The respective red
gear light should illuminate, indicating uplock release. The gear free-falls
to the LOCKED position and the green gear light illuminates as each gear is
locked DOWN .
Wait 15 Seconds After The Last Manual Gear Extension Handle Is Pulled:
Landing Gear Lever ......................................................................DOWN
The red gear lights extinguish.
>@BCD Nose Wheel Steering Switch.........................ALT
Landing Checklist .......................................................................COMPLETE
* * * *
737
Flight Manual
Continental
HYDRAULICS
Sec. 2.13 Page 3
Rev. 11/15/02 #41
LOSS OF SYSTEM B
Loss of System B is indicated by the System B pressure at zero and illumination
of:
· MASTER CAUTION lights.
· FLT CONT and HYD annunciator lights.
· System B LOW PRESSURE lights.
· System B flight control LOW PRESSURE light.
· FEEL DIF PRESS light.
System B Flight Control Switch....................................................STBY RUD
This activates the standby pump, supplies pressure to the rudder power
control unit, arms the standby LOW PRESSURE light, and switches the flight
control LOW PRESSURE light to monitor standby rudder valve position. The
yaw damper switch also moves to the OFF position.
System B Hydraulic Pumps ......................................................................OFF
Outboard flight spoilers, autopilot B and yaw damper are inoperative. The
No. 2 engine thrust reverser and leading edge flaps and slats have standby
pressure. Trailing edge flaps have alternate electrical power. Normal
brakes are inoperative. Alternate brakes are available.
Ref Speed ................................................................................................VREF 15
BCD If using VREF 15 and If icing conditions have been
experienced or are anticipated prior to landing set VREF =VREF 15 + 10.
Use normal wind additive to VREF for establishing appropriate “target”
speed.
Target................................................................VREF 15 + WIND ADDITIVE
>>@ If ice formations are observed on the aircraft surfaces, (wings,
windshield wipers, window frames, etc.) add 10 knots to VREF for
establishing Target speed to ensure maneuvering capability.
Plan a flaps 15 landing using alternate extension. (A flaps 15 landing is
recommended because of the time required to retract flaps electrically in
the event of a go-around.)
(Continued)
HYDRAULICS
Sec. 2.13 Page 4
Rev. 11/15/02 #41
Continental
737
Flight Manual
Flaps 15 configuration results in a higher than normal pitch attitude. There
is a tendency to push the nose down to obtain a normal visual sight picture.
Use caution to avoid going below the normal glide path.
When the leading edge devices have been extended by the alternate system,
they cannot be retracted. Update weather information prior to extension
　
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