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

How are the handsets directory codes determined? . They are determined by a switch selections behind the cradle. . They are determined by software loaded from the cabin service system controller (CSSC). . They are determined by program pin. .

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

The aft external power connection is used for these purposes: . Supply the Standby Power system on ground. . Aft external power goes to the aircraft electrical buses. . Start the right engine with external power (if APU is not available), operate a third hydraulic electric motor and Reduce loadshed when operating the packs on the ground for test purposes. .

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

The battery State of Charge (SOC) indicator on P5 panel lets you see the condition of the: . Only the APU battery. . Only the main battery. . Main and APU batteries. .

What conditions turn on the VFSG GEN DRIVE light?. Low oil pressure and High oil temperature. Low oil pressure and VFSG bearing failure. High oil temperature and VFSG bearing failure.

What component change 235 Vac or 115 Vac to +/- 270 Vdc?. CMSCs. ATRUs. ATUs.

What is the SATCOM LRU sends beam steering signals to the High Gain Antenna (HGA)?. Diplexer Low Noise Amplifier (DLNA) module. Satellite Data Unit (SDU). Satellite Data Unit Configuration Module (SCM).

The main function of Remote Power Distribution System (RPDS) is: It supplies 28 Vdc and 115 Vac to electrical loads of 10 Amps and more. It supplies 28 Vdc and 115 Vac to electrical loads of 50 Amps or less. It supplies 28 Vdc and 115 Vac to electrical loads of 10 Amps or less.

If you have to communicate from Flight Deck (flight crew) with P40 or P57 jack service interphone panels then: Select service interphone switch to "ON" in P40 and flight interphone on audio control panel. Select service interphone switch to "ON" in P57 and service interphone on audio control panel. Select service interphone switch to "ON" in P5 and flight interphone (FLT) on audio control panel.

What is the function of CBIC?. Monitor and control electronic circuit breakers. Monitor and control the electrical power system. Is used to control and monitoring contactors (ELCC's, BTB, etc.).

All the communication and navigation systems are noisy, so the problem could be: Some Static Dischargers are broken or missing. Electrical power is not voltage regulated. Electrical power is not frequency regulated.

The main function of Secondary Power Distribution Units (SPDUs) is: To supply 115 VAC and 28 VDC power to loads of 10 amps or less. To supply 115 VAC and 28 VDC power to loads of 50 amps or less. To supply 115 VAC and 28 VDC power to loads of 50 amps and more.

What happens if gas pressure in the battery enclosure goes above 3 psi?. Red indicator on the pressure burst indicator retract. Red indicator on the pressure burst indicator extends. A pressure burst disc ruptures and the gas vents overboard through a metal tube.

If the Cabin Service System Controller (CSSC) fails: Only the handset on the master attendance panel continues to operate normally. All handsets fail. Handsets continue to operate normally.

How does the bus power control unit (BPCU) get 28v dc power to sense the power quality and close the external power contactor?. Backup bus. External power transformer rectifier unit. APU hot battery bus.

Where are the located HF transceivers?. AFT EE bay. Forward Cargo Compartment. AFT cargo compartment.

What electrical power does the VFSG provide to the aircraft?. The VFSG provides 235 VAC / 25 KVA / variable frequency. The VFSG provides 235 VAC / 250 KVA / variable frequency. The VFSG provides 115 VAC / 90 KVA / 400 Hz.

Which is the component to monitor the VFSGs oil temperature in the surface air oil heat exchangers (SAOHE): L BPCU to L 1 and L2 VFSGs. R BPCU for R1 and R2 VFSGs. Left and right EECs.

The transformer rectifier units (TRU): Change 235v ac to +/-270v dc for the common motor start controllers (CMSC). Change 235v ac to 28v dc. Convert 235Volts in 115Volts or 115Volts in 235Volts.

Makes alert and chime tones: Cabin services system controller (CSSC). Cabin zone unit (CZU). Speaker drive module (SDM).

What is the purpose of the galley auto transformer unit (GATU)?. Changes 235v ac to 115vac for the aft galley. Changes 235v ac to 115vac for the fwd galley. Changes 115v ac to 235vac for the aft galley.

The start power unit (SPU): Change 28v dc from the APU battery to 115v ac for APU battery start. Change 235v ac to 28v dc. Change 235v ac or 115v ac to +/-270v dc for the common motor start controllers (CMSC).

What components change 235 v ac to 115 v ac?. ATU. ATRU. SPDU.

Where is the B787-9 HF antenna located?. A. B. C.

With forward external powers supplying electrical power to the airplane: Both left and right BPCUs can be software loaded. Only the right BPCU can be software loaded. Only the left BPCU can be software loaded.

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

The airplane is in the GROUND HANDLING mode. What do you do to give power to the ground service bus?. Ground Service Enable on P5. Ground Service switch on the master attendant panel. Ground Service menu on the Cabin Attendant Panel (CAP).

Which LRUs has the SELCAL decoder software?. Display and Crew Alerting Function (DCAF) partition on General Purpose Modules (GPMs). The SELCAL decoder LRU. Audio Gateway Units (AGU).

Where do you reset the red LED in the EMERLIGHTS TEST switch on the master ASP switch after the test? (Ver la imagen del panel con el botón iluminado en verde). ATA 33 CMCF GROUND TEST. ATA 33 CMCF SPECIAL FUNCTION. Cabin Maintenance menu on Cabin Attendant Panel (CAP).

If the ACP (audio control panel) of the captain side fail, how can use the observer ACP with: Swapping the ACPs. Using the observer audio override selector sw in the P5. Turning OFF and Back to ON the captain ACP.

HF. What is the HF antenna coupler function?. It matches (tunes) the impedance of the antenna to the impedance of the transceiver. It modifies the antenna length for better transmission and reception. It reduces the transmission and reception noise.

What are the CBIC control modes?. CBIC has three control modes: Limited, Ground and Maintenance. CBIC has two control modes: Ground and Air. CBIC has three control modes: Limited, Full and Maintenance.

How long could the emergency light operate?. Up to 15 minutes. Up to 30 minutes. Up to 20 minutes.

How is APU Battery charged?. By a Battery Charger supplied from the F/O INSTR BUS. By a Battery Charger supplied from the HOT BATTERY BUS. By a Battery Charger supplied from the CAPT INSTR BUS.

If the right BPCU loose its external power transformer rectifier unit, where does it takes power: Left external power transformer rectifier unit. Backup bus. R 28V DC bus.

You can get access to the CABIN MAINTENANCE screens on the CAP and. Maintenance Laptop. MCDF. EFB.

When the towing switch is selected ON: Power to the left VHF communications and the flight deck dome lights. Energizes the four EBPSUs. Both are correct.

What is the center VHF antenna location?. B. C. A.