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Ground Proximity Warning Computer

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PWS sends windshear alert data to the ground proximity warning computer (GPWC) on the ARINC 708A hazard bus. The GPWC uses this data to prioritizes alerts. If there is a higher priority alert, the GPWC sends an inhibit discrete to the WXR. This discrete inhibits the PWS alert output.

Landing Gear Control Lever Module

The landing gear control lever module sends an analog discrete to PWS. PWS uses this discrete in its takeoff/ approach alert logic.

Radio Altimeter

The radio altimeter (RA) provides radio altitude data to PWS.

PWS uses radio altitude data to do these functions:

· Turn PWS on and off

· Enable/disable display and alert functions.

Remote Electronic Unit

The WXR sends the PWS aural alerts to the remote electronic unit (REU).

Autothrottle Microswitch Pack

The left and right autothrottle microswitch packs send a discrete to the PWS. The PWS uses this discrete to determine the throttle lever position for the automatic turn on.

Display Electronic Unit

The WXR sends the following discretes to the display electronic units:

· PWS warning

· PWS caution

· PWS fail.

 

Traffic Alert and Collision Avoidance System

WXR sends an inhibit discrete to the traffic alert and collision avoidance system (TCAS) computer when there is a PWS alert.

This discrete does these functions:

· Changes resolution advisories (RAs) to traffic advisories (TAs)

· Inhibits all TCAS audio alerts.

 

 

WXR SYSTEM - ANTENNA CONTROL INTERFACE

Antenna Tilt

The WXR panel supplies antenna tilt control signals to the WXR R/T.

Attitude Sources

The WXR R/T uses ADIRU attitude data to stabilize the antenna. The left ADIRU signals connect to the on-side attitude input of the WXR R/T. The right ADIRU signals connect to the off-side attitude input of the WXR R/T.

Attitude Source Select Discrete

Use the IRS select switch to choose the ADIRU source to the WXR R/T. Set the switch to NORMAL or BOTH ON L to use the left ADIRU input. Set the switch to BOTH ON R to use the right ADIRU input.

WXR R/T Antenna Control

The WXR R/T sends signals to the WXR antenna assembly to control it and make it stable.

Antenna Position Monitoring

The WXR antenna sends antenna position data to the WXR R/T for scan and elevation feedback.

 

 

 

WXR SYSTEM - CONTROL PANEL

General

The weather radar (WXR) control panel has these functions:

· Mode selection

· Tilt control

· Gain control.


Дата добавления: 2015-10-26; просмотров: 117 | Нарушение авторских прав


Читайте в этой же книге: Состав типовой МНРЛС | Weather radar. | Antenna Assembly | WXR Map Switch | Display Modes | PWS Warning - Flight Deck Effects | Sweep Patterns | System Status Data | Training Information Point |
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System Outputs| Mode Selector

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