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The service interphone system lets personnel talk with each other from flight compartment and: P40 & P57. Fwd & Aft E/E. P40 & APU Compartment.

The frequency of HF and VHF communication system is selected through. Their own panels. Tuning Control Panel (TCP). Head-Up Displays (HUD).

What is the function of Passenger Service Modules (PSM)?. To control the Boarding Music and Passenger Speakers. To control emergency lights. To control the large passenger information signs and individual lights.

Emergency lights get power from batteries if: One VFSG fails in flight. Airplane power fails. All VFSG are lost in flight and APU works normally.

SATCOM. The diplexer low noise amplifier (DLNA): lets the SATCOM system receive and transmit signals at the same time (full duplex). lets the SATCOM system receive or transmit signals at a time (half duplex). lets the SATCOM system receive signals only.

How many Cabin Zone Units (CZU) are there in the A/C?. Only one for the whole A/C. 3, one for each one of the 3 zones. 2, one for BussinessClass, and one for economy.

To get the health status (failures) of the Cabin Service System, in the Cabin Service System Controller (CSSC), the access is through: CAP (Cabin Attendant Panel) only. Either the Maintenance Laptop or CAP. The Maintenance Laptop only.

During Emergency Light TEST , the signal to the remote WCU is: Wired. During test the remote WCU are not used. Wireless.

What kind of HF antenna is used in the 787-9?. It is a blade type antenna. It is a integral type antenna, located on the leading edge of the vertical stabilizer. It is a wire type antenna.

The Cabin Attendant Handset has interface with... a Passenger Service Modules (PSM). a Speaker Drive Modules (SDM). a Cabin Zone Unit (CZU).

The power for the emergency lights comes from: Aircraft Battery. WELS control units (WCU) Batteries. RPDUS (115 Vac).

The Cabin Zone Unit (CZU): Are touch screen. Changes the digital signal to analog audio. Controls cabina area lighting.

Where can you control the emergency lighting system?. From P5 only. From CAPs. From P5 or master attendant switch panel (ASP).

SELCAL. In which unit are located the "SELCAL", decoder function?. In the AGUs. In the HF transceivers. In the VHF Transceivers.

What happens with the audio signals if the common data network (CDN) fails?. The audio communication will be inoperative untill the end of flight. The audio is sent through the audio gateway unit (AGU) for backup. The crew will use the audio override panel to reconfigure the system.

What is meaning of EICAS msg, RADIO TRANSMIT CAPT, F/O or OBS?. A VHF or HF communication transceiver is not modulating the signal. A VHF or HF communication system transmits for more the 30 seconds. Some of the flight crew members want to use VHF or HF transceivers.

To establish comunication between the Flt interphone system and Service interphone: The "SVC Intph" sw, in the P5, in ON position. The TCP, selection mode in CAB. The ACP, "CAB MIC SW" in ON position.

If the ACP (audio control panel) of the captain side fail, how can use the observer ACP with: Swapping the ACPs. Turning OFF and Back to ON the captain ACP. Using the observer audio override selector sw in the P8.

What is the only Audio Control Panel (ACP) used during Battery towing operation?. The Captain Audio Control Panel. The First Observer Audio Control Panel. The First Officer Audio Control Panel.

Where are the volumen control for the speakers in the flight deck?. In the speakers itself. In the Audio control panels. In the flight control wheel.