Radio Control

You use the radio control page to change the VHF radio from the voice mode to the data mode or from the data mode to the voice mode. Use LSK 1R to change the mode. In the voice mode, use LSK 2R to tune the radio.

In the data mode, data link service providers (DSP) give the frequencies for ACARS coverage. The flight crew can select the DSP from this page or from the AOC pages. Line 2L shows the current data frequency.

Select LSK 4L to start the link test.

Select LSK 5L to select a data link service provider.

Technical Menu

You also use the technical menu to do a check of the status of LRUs connected to ACARS. The PERIPHERALS selection (LSK 3L) selects this check. There is a list of the LRUs and whether they are PRESENT (connected) or ABSENT (not connected) and the LRU status (OK or FAIL).

The CLOCK SET menu lets you set the ACARS clock. These are the page displays and the selections:

• Present ACARS time and date (line 1)

• SET TIME - SET DATE - put the time/date in the scratch pad and line select to the proper position

• GROUND REQ - requests an uplink message from the

ground station with the time

• SHIP - updates the ACARS clock with the airplane clock time and date (if connected)

• GPS - updates the ACARS clock with the global positioning system clock time and date (if installed).

The RELAYS test menu lets you do a test of two relays in the ACARS MU. These are the relays:

• Relay 1 (LSK 3L) does a test of the chime signal from the aural warning module

• Relay 2 (LSK 3R) does a test of the call light on the SELCAL control panel.

The PGM PINS menu shows the program pins connected to the ACARS MU. The program pins selections come from the program switch module.

DISC IN (LSK 3R) and DISC OUT (LSK 4R) show the status of discretes coming in to ACARS and going out of ACARS.

Select PASSWORD to enter a password and to change/view protected menus. These are the protected menus:

• OVERRIDES - changes the registration number, airline and airline identification. This information comes from the program switch module.

• MSG TRACE - message trace - lets the user trace messages internal to the MU. This menu is used by shop maintenance personnel.

• VHF SCAN - lets the user change the data link service

providers that the MU will use for ACARS.

Return

When you select RETURN from any menu, you go to the

previous, higher level menu.

General

There are many ACARS reports. Generally, these reports use short codes to decrease the cost of satellite or ground station use.

All ACARS reports have header information followed by the report data.

Report Header

Typically, the header includes this information:

• Report type

• Flight number

• Flight origin and destination

• Registration number

• Date and time sent.

Report Data

An example is the IN report. The ACARS MU automatically sends this report when the airplane gets to the gate.

The IN report typically includes:

• IN event time

• Remaining fuel

• Average wind factor

• Optional scratchpad text.

Acars - operation - downlink reports

ACARS Software

You can load software and data base information into the ACARS MU with an airborne data loader or a portable data loader. To load the software, do these tasks:

• Make sure the ACARS system has power

• Set the SYSTEM SELECT switch to ACARS/CMU

• Set the top switch to SINGLE SYS

• Put the first data disk into the data loader disk drive

• After the last disk is complete, set the data loader control panel switch to NORM.

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Вопросы для самоконтроля.