TACAN Radio Navigation System

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Questions and Answers

What is the power supply for TACAN 1?

SEPDC 2

EEPDC

PSM

SEPDC 1 (correct)

Where is RA transceiver 1 located?

On the bottom

On the left side (correct)

On the right side

On the top

What is the purpose of the RA interface with ICPs?

To silence EMCOM and DASS

To control the engine master lever

To increase aircraft discretion

To override RA emissions (correct)

What is the main component of the ISS?

2 ISU Signup and view all the answers

What is the power supply for ISU 1?

SEPDC 1 Signup and view all the answers

What is the location of the MMRP?

1100VU Signup and view all the answers

What is the purpose of the EVS?

To adjust image alignment Signup and view all the answers

What is the indication for TACAN 1?

Lower left Signup and view all the answers

What is the function of the military radar?

To display high-resolution ground maps Signup and view all the answers

What is the power supply for RA transceiver 1 in emergency?

EEPDC Signup and view all the answers

What is the main instrument panel of the aircraft?

ISIS Signup and view all the answers

What is the purpose of the GADIRU 1&3 using ARINC 429?

To connect to the ISIS unit Signup and view all the answers

What is the function of the MMR subsystem?

To provide landing system and civil GPS data Signup and view all the answers

What is the purpose of the RMP in the radio navigation system?

To act as a gateway for the FMC Signup and view all the answers

Where is the MMR 1 located?

Lower deck avionics bay Signup and view all the answers

What is the power supply of the MMR 1?

EEPDC at 115 VAC Signup and view all the answers

What is the function of the VOR subsystem?

To provide azimut orientation to a VOR ground station Signup and view all the answers

What is the power supply of the VOR/MKR 1 receiver?

AC EMERGENCY BUS at 115 VAC Signup and view all the answers

What is the primary function of the DME system?

Digital readout of slant distance Signup and view all the answers

Which component supplies power to the ADF receiver?

SEPDC 1 Signup and view all the answers

Where are the DME antennas located?

Bottom fuselage Signup and view all the answers

What is the purpose of the TACAN system?

Radio orientation and radio distance measurement Signup and view all the answers

What is the location of the ADF receiver?

Upper deck avionics bay Signup and view all the answers

What command is used to cut both DME power supply?

MMMS or ICPs command Signup and view all the answers

Study Notes

Power Supply

SEPDC 1 supplies TACAN 1 and RA transceiver 1
SEPDC 2 supplies TACAN 2 and RA transceiver 2
EEPDC supplies RA transceiver 1 in emergency mode
PSM's ISU 1 is supplied by SEPDC 1
WXR antenna is supplied by PSM at 200 VDC

TACAN

Transceiver 1 located at 1100VU
Transceiver 2 located at 1800VU
Antenna 1 and 3 on top, antenna 2 and 4 on bottom
Indication on NTD: TACAN 1 lower left, TACAN 2 lower right

Radio Altimeter (RA)

2 RA transceivers, 1 transmitting and 1 receiving antenna per receiver
4 antennas
RA height provided to CDS and HUDS through ADCN (IOM)
RA height data also sent through direct link to FWS and AFS
RA transceiver 1 located on left side, RA transceiver 2 on right side
Antenna located in bottom area

ISS

Consists of 2 ISU, WXR antenna, 2 TCAS antennas, and WXR control panel
ISU 1 situated at 1000VU, ISU 2 situated at 1000VU
Normal mode: all functions delivered by ISU 1 (master)
Mixed mode: if 1 function is lost, functions are shared by ISU 2 (master)
Downgraded mode: TCAS failure or at least 2 faults in the system, ISU selected for WXR function is the master

Weather Radar (WXR)

WXR antenna is supplied by PSM at 200 VDC
Detailed description: In single configuration, RTU 2 is a dummy RTU, enabling stowage plugs from antenna drive unit and ISU

TAWS

GPWS mode 5 active less than 1000 ft AGL and L/G down

TCAS

Military radar component: MMRP, Military radar control panel, ISU 1, and Radar antenna assembly
Power supply: Military function (high-resolution ground map image display NTD) and Air-to-Air function
MMRP located at 1100VU
Data interface of MMRP with A/C systems performed through Ethernet using ISU as gateway

EVS

Interconnection with other systems ensured by both HUDC
Detailed description: External interfaces; image automatic adjustment is continuously performed by EVS based on alignment parameters stored in HUD PMM
Detailed control and indications: EVS FAULT, EVS OVERHEAT, EVS DEGRADED

VOR/DME/MMR/ADF

VOR/DME/MMR/ADF test switch: more than 3s
ISIS located on main instrument panel
Standby compass located on overhead panel, top of windshield center post
Standby static located on left and right sides
Standby pitot located on right side

GADIRU

GADIRU 1 & 3 using ARINC 429 > ISIS
ISIS unit: detailed controls and indications
ISIS: air data indications: Mach number visible above 0.5 and disappears below 0.45

Tuning and displays: resume 2 tuning: auto FMS/manual FMS CDS RMP... pas RMP3 en nav, si FMC fail en manual utiliser RMP
2 tuning: Automatic (supported by FMS) and Manual (supported by FMS, CDS, RMPs)
RMP 3 not used for navigation
In case of double FMC failure in manual mode, RMP will be the only means to tune

MMR

2 functions: Landing system (ILS MLS) and Civil GPS (FMS)
Power supply: MMR1 supplied by EEPDC at 115 VAC, MMR2 supplied by SEPDC 2 at 115 VAC
Location: MMR 1 located at lower deck avionics bay 1300VU, MMR 2 located at main avionics bay 1200VU
2 GPS antennas, 1 MLS omni-directional antenna at front top, MLS landing antenna at lower part of nose fuselage

VOR/Marker

VOR provides azimuth orientation to a VOR ground station
Marker provides indication about the passage of the aircraft over the marker beacon transmitters
VOR receives, decodes, and processes bearing information from VOR signals
Power supply: AC EMERGENCY BUS supplies VOR/MKR 1 receiver at 115 VAC, SEPDC 2 supplies VOR/MKR 2 receiver at 115 VAC
Location: VOR/Marker receiver located on the upper deck avionics bay (1100 and 1200)

DME

Provides digital readout of slant distance and audio signal
Consists of 2 interrogators and 2 antennas
Power supply: SEPDC 1 supplies DME 1 interrogator, SEPDC 2 supplies DME 2 interrogator
Location: DME interrogator 1 located at 1100VU, DME interrogator 2 located at 1200VU
Antennas located at bottom fuselage

ADF

Provides indication of the relating bearing and aural identification
1 antenna and 1 receiver
Power supply: SEPDC 1 supplies ADF receiver
Location: receiver located in the upper deck avionics bay at 1000VU, antenna located at bottom fuselage

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Description

This quiz covers the details of the TACAN radio navigation system, including power supply, location, and controls. It also touches on the radio altimeter system.