Communications

Question 1

What is the purpose of the ALT-NORM switch on the ACP?

Answer 1

Normal operation or degraded (ALT) mode

ALT mode:
-bypasses applicable ACP. ACP is inop
-can only communicate on one radio
—CA VHF1, FO VHF 2, Observer VHF 1
-ACP switches not functional
-only usable radio heard
—preset volume, headset only, speaker inop
-flight and service interphone inop (no hot mic)
-hand mic and overhead speaker inop

-what works
—mask and boom mics. MASK-BOOM switch
—yoke and ACP PTT or R/T switches

Question 2

The Push-To-Talk switch, when toggled, transmits on which transmitter?

Answer 2

As selected by the ACP transmitter selector

Question 3

What does the SERVICE INTERPHONE switch on the aft overhead do?

Answer 3

When positioned ON, allows maintenance/service personnel external jacks to connect to the system.

In OFF, flight deck to cabin still works

Question 4

What does the ATTEND button do?

Answer 4

Sounds a two tone chime in the passenger cabin and illuminates both pink Master Call Lights

Question 5

How does the flight deck alert the ground crew?

Answer 5

Ground Call (GRD CALL) switch on overhead panel.

Sounds horn in nose wheel well. Sounds continuously until switch released.

Question 6

What is the purpose of the VHF TEST switch on the RTP?

Answer 6

Removes automatic squelch, permitting reception of background noise to test receiver

Improves weak signal reception

Question 7

What is the indication of tuning an offside Radio Tuning Panel RTP)?

Answer 7

Offside tuning white light

Indicates the radio normally associated with this panel is being tuned by another RTP, or

The RTP is being used to tune a radio not normally associated with this radio tuning panel

Question 8

What failure messages could display on the RTPs, and what do they mean?

Answer 8

FAIL FAIL
-selected radio has failed

PANEL FAIL
-that RTP has failed

Question 9

What considerations should be made before keying the HF radio on the ground?

Answer 9

Can cause injury or fire

DO NOT KEY
-during fueling/de-fueling
-personnel within 10’ from vertical stab
(Aft service/entry doors open)

Question 10

Does the hand microphone on the aft electronics panel require the ACP to be tuned before making a PA to the cabin?

Answer 10

No. The PA only hand mic bypasses the ACP

Question 11

Why must a SELCAL light be reset?

Answer 11

No other calls (call notifications indicated by SELCAL light) can be received until the channel is reset.

Question 12

Which ACP is used to control the cabin MEDLINK headset jacks?

Answer 12

Observers/ACP 3

Question 13

What is the priority of source selection for ACARS in the data mode?

Answer 13

1. VHF 3, line of sight, 150-200 nm max
2. SATCOM
3. HF