Intercommunications System (ICS)

Question 1

What is the function of the ICS?

Answer 1

to provide low crosstalk, secure and nonsecure communications from station to station and from station to radio and to other avionic system communication interfaces on the E-6B aircraft

Question 2

Where is the Communications Control Unit located?

Answer 2

E45 rack in the FWD lower lobe

Question 3

What are the power requirements for the CCU?

Answer 3

28 VDC from PRI CCU & SEC CCU c/b on P5

Question 4

What is the function of the CCU?

Answer 4

“brains” of ICS

provides interface for radios and communications subsystems

Question 5

Where are the Crew Station Units (CSUs) located and how many are there?

Answer 5

4 on flight deck
4 in mission area (ACOMs)
1 at Reel Op station

Question 6

What are the power requirements of the CSUs?

Answer 6

28 VDC from P5

Question 7

What is the function of the CSU?

Answer 7

Flight Deck - monitor systems
Mission - access R/Ts for transmission
Reel - monitor the 3 ICS channels

Question 8

Where are the Auxiliary Control Units (ACUs) located and how many are there?

Answer 8

4/ positions 17,18,20, 21 (ACOMs)

Question 9

What are the power requirements of the ACU?

Answer 9

28 VDC from MSN-1 & MSN-2 c/b P5

Question 10

What is the function of the ACU?

Answer 10

allow access to VHF/UHF and HF 1 transmitters

Position 21 can utilize TSEC 8

Question 11

Which HF radios are capable of going secure?

Answer 11

HF 3, 4, & 5

Question 12

Where is the Maintenance Control Unit (MCU) located?

Answer 12

ACO Station in Comm Central

Question 13

What are the power requirements for the MCU?

Answer 13

28 VDC from 28 VDC DAISS 1 on E42-1/ & AF AMP on P5

Question 14

What is the function of the MCU?

Answer 14

provide access to the CALL Intercom Network and Emergency PA

Question 15

Where are the Maintenance Station Units (MSUs) located and how many are there?

Answer 15

Lower Lobes, External Jacks, Reel Area, Galley

8

Question 16

What are the power requirements for the MSUs?

Answer 16

28 VDC from P5

Question 17

What is the function of the MSU?

Answer 17

ICS station connection for emergency communication to the flight deck, crew members, and Reel Operator

Question 18

Where is the Emergency Audio Panel (EAP) located?

Answer 18

center pedestal of flight deck

Question 19

What are the power requirements for the EAP?

Answer 19

28 VDC from PRI CCU, SEC CCU, BACKUP CSU, AC CSU c/bs on P5

also from RADIO PANEL - MAIN c/b on P7

Question 20

What is the function of the EAP?

Answer 20

automatically initiate or allow the Pilot and Co-pilot to select the PA emergency audio backup mode

Question 21

Where is the Emergency PA Assembly located?

Answer 21

ACO position 19

Question 22

Where is the PA Amplifier located?

Answer 22

E45 Rack, FWD Lower Lobe

Question 23

How many Loudspeakers are there and where are they located?

Answer 23

16
Main Deck (9)
Lower Compartments (7)

Question 24

What are the power requirements for the PA and Loudspeaker system?

Answer 24

28 VDC from AF AMP c/b on P5

Question 25

What is the function of the PA and Loudspeaker system?

Answer 25

route audio to PA speakers and headsets

provide ACO access to DAISS during normal operation or access to PA during emergency( backup)