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The flat plate antenna is an array of radiation slots. The RF
pulses radiate from each of the slots. The antenna makes a
beam 5.4 degrees high and 5.4 degrees wide. The antenna
weighs 6 lb (2.7 kg). It is 23 inches wide.
Antenna Pedestal
The antenna pedestal contains these items:
* Scan motors
* Antenna position monitors
* Elevation and scan disable switches.
There is a horizontal scan motor to move the antenna +/- 90
degrees from the airplane centerline. There is also an elevation
scan motor to move the antenna +/- 40 degrees up or down.
This value includes manual tilt selection from the WXR control
panel.
There is a zero position monitor and an incremental monitor for
each motor. These monitors send antenna horizontal scan and
elevation scan position data to the WXR R/T. There are
elevation and azimuth scales that permit a visual
measurement of the tilt and scan angles.
There are elevation and scan disable switches on the antenna
pedestal. They remove power to the scan and elevation motors.
Use these switches to prevent movement of the antenna during
maintenance. The switches do not stop RF transmissions from
the WXR R/T.
A torque spring in the antenna pedestal balances the weight of
the antenna. When you remove the antenna, the torque spring
moves the elevation drive to the upper position.
Training Information Point
Use the elevation and scan disable switches for safety to make
sure that the antenna does not move while you work on or
around it.
WARNING: DO NOT OPEN THE NOSE RADOME IF THE WIND
IS MORE THAN 15 KNOTS. IF YOU OPEN THE
RADOME IN A WIND, THE RADOME CAN MOVE
QUICKLY. THIS CAN CAUSE INJURY TO PERSONS
OR DAMAGE TO EQUIPMENT.
WXR SYSTEM - ANTENNA
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-43-00-011
WARNING: DO NOT OPERATE THE WEATHER RADAR
UNLESS ALL PERSONNEL ARE MORE THAN
50 FT (15 M) FROM THE RADAR. DO NOT
OPERATE THE WEATHER RADAR IN A HANGAR.
IF YOU DO NOT OBEY THESE PRECAUTIONS,
INJURIES TO PERSONNEL CAN OCCUR.
WARNING: IF THERE IS FUEL LEAKAGE OR AN OPEN FUEL
CELL LESS THAN 50 FT (15 M) FROM THE RADAR,
DO NOT OPERATE THE WEATHER RADAR. IF
THERE IS FUEL IN THE 50-FOOT RADIUS AROUND
THE RADAR, IT CAN CAUSE A FIRE AND
EXPLOSION. THESE CAN CAUSE INJURIES TO
PERSONNEL, AND DAMAGE TO EQUIPMENT.
THESE CAN KILL PERSONNEL.
WXR SYSTEM - ANTENNA
EFFECTIVITY
SHZ ALL 34-43-00
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D633A101-SHZ1 Feb 10/2007
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-43-00-011
WXR SYSTEM - ANTENNA
WXR SYSTEM - ANTENNA
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-43-00-011
EFIS Control Panel
These are the functions of the EFIS control panel (CP) for WXR
control:
* Supplies the on and off control of the WXR R/T
* Enables the navigation displays (ND) to show WXR data
* Supplies the selection of different ND modes
* Supplies the selection of different ranges for WXR data to
show on the NDs.
WXR Map Switch
These are the things that occur when you push the WXR map
switch:
* The WXR R/T starts to operate
* The WXR data shows on the on-side ND.
To stop the operation of the WXR R/T, the WXR map switches on
both EFIS control panels must be off.
Mode Selector
Use the mode selector switch to select an ND mode. A WXR
display can show in these ND modes:
* Expanded APP (approach) mode
* Expanded VOR mode
* Expanded MAP mode
* Centered MAP mode.
Range Selector
The EFIS control panel range selector has eight positions. The
range selections are 5, 10, 20, 40, 80, 160, 320, and 640 nautical
miles (NM). With the 640 NM range selection, the 640 NM range
shows on the ND. But the WXR R/T only shows weather displays
out to a maximum range of 320 NM.
The weather/turbulence mode shows turbulence data up to a
maximum range of 40 nautical miles (NM). If a range more than
40 NM is set on the EFIS control panel, the NDs show weather
data only.
WXR SYSTEM - EFIS CONTROL PANEL - OPERATION
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
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