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Two GPS Failures

Читайте также:
  1. Power Failures
  2. Typical bearing failures

If both GPS systems have a failure, these annunciations show:

· GPS light on the IRS mode select unit

· IRS light on the system status annunciator

· Left and right master caution lights.

When you push and release either the left or right master caution light, the IRS light and master caution lights go out but the GPS light stays on.

 

 

GPS - CDU DISPLAYS

General

GPS data shows on the control display unit (CDU). The position pages show this data. These are the three position pages:

· Position initialization (1/3)

· Position reference (2/3)

· Position shift (3/3).

 

You use the next and previous key to see all three position pages. These are the pages that show GPS data:

· Position reference (POS REF)

· Position shift (POS SHIFT).

 

POS REF Page

The POS REF page shows GPS L (1) and R (2) positions.

POS SHIFT Page

The POS SHIFT page shows the GPS position from the flight management computer (FMC) position. The GPS position shows in these two parts divided by a slash (/):

· Bearing of the GPS position from the FMC position

· Distance of the GPS position from the FMC position in nautical miles (NM).

 

Training Information Point

For all CDU displays that show GPS data, the displays refer to GPS 1 as GPS L and GPS 2 as GPS R.

The POS SHIFT page does not show information in the data fields when the airplane is on the ground.

 

 

GPS - TRAINING INFORMATION POINT – 1

General

The GPS has continuous monitor BITE. These are the three ways to detect GPS failures:

· When both GPS system 1 and GPS system 2 have failures, the GPS fail light comes on.

· When you push a master caution annunciator and a GPS system has a failure, the GPS fail light comes on.

· The FMC SENSOR STATUS page shows MMR failures. The FMC SENSOR DATA page shows the internal failure in the MMR.

 

 

 

GPS - TRAINING INFORMATION POINT – 2

General

These are the two pages that show GPS maintenance data:

· FMCS SENSOR STATUS page

· FMCS SENSOR DATA page.

 


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Читайте в этой же книге: Match the information with appropriate picture. Give some additional information on the items touched in the texts. | II. Writing Section | GPS - COMPONENT LOCATION |
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