Training Information Point

Do not paint the radiation surface or the back plate of the antenna. Paint does not permit the antenna to send or receive RF signals.

RA SYSTEM - OPERATION - 1

EFIS Control Panel

The EFIS control panel controls the radio minimums value and resets the radio minimums alert display to a normal display. The radio minimums shows on the captain and first officer display units. The left EFIS control panel controls the captain display units. The right EFIS control panel controls the first officer display units.

The minimums controls have these three controls:

· A two-position rotary switch (minimums reference selector)

· A spring loaded rotary switch (minimums altitude selector)

· A radio minimums reset (RST) switch.

You use the radio position on the minimums reference selector to set the radio minimums.

To set a radio minimums value, use the rotary switch to adjust the value between -1 feet and +999 feet.

Push the radio minimums reset (RST) switch to set the radio minimums alert display back to normal.

Display Unit

The display unit (DU) shows radio altitude and radio minimums values. The flight crew uses this data during an approach and a landing.

Radio altitude shows in white for airplane altitude between -12 and 2500 feet. This is when the radio altitude values update:

· Two foot increments from -12 to 100 feet

· Ten foot increments from 100 to 500 feet

· Twenty foot increments from 500 to 2500 feet.

The radio altitude does not show above 2500 feet.

The radio altitude display shows a white highlight box around it for ten seconds when the radio altitude initially shows on the display unit.

The green radio minimums display shows below the ADI display. The radio minimums display does not show for these reasons:

· Baro minimums is selected on the EFIS control panel

· Radio minimums reset switch is pushed

· Radio minimums value is less than zero.

Дата добавления: 2015-11-14