01 - CCS

Question 1

How many RDCs are on the airplane?

Answer 1

There are 21 Remote Data Concentrator’s (RDC’s)

Question 2

Can the airplane be dispatched with failed RDC’s?

Answer 2

Yes, but with only 1 and it must be installed in the #19 position.

Question 3

Why are there no RDC’s #20 and #22?

Answer 3

RDC’s are numbered based on their being on the left side of the airplane (odd numbers) or the right side (even numbers). Because there are more RDC’s on the left side of the airplane (12) than on the right (9), numbers 20 and 22 were not used.

Question 4

A Remote Data Concentrator (RDC) can translate ARINC 664 data into what other protocol’s?

Answer 4

ARINC 429, Analog (and analog discretes), and Controller Area Network (CAN) bus.

Question 5

RDC stands for …?

Answer 5

Remote Data Concentrator

Question 6

RDC #19 fails. Can the airplane be dispatched?

Answer 6

Yes! The failed RDC must be in the #19 position before it can be dispatched. And, because the failed RDC is #19, the airplane can be dispatched after review of the appropriate DDG entry.

Question 7

RDC #12 fails. Can the airplane be dispatched?

Answer 7

Yes! However, the failed RDC must be in the #19 position. So, RDC #12 must be swapped with RDC #19 before dispatch.

Question 8

True or False, a RDC is connected to a channel A and a channel B network switch?

Answer 8

True!

Question 9

True or False, a RDC has two channels?

Answer 9

True! Each RDC has a channel A input from a channel A network switch, and a channel B input from a channel B switch.

Question 10

Why is a RDC connected to both a channel A and a channel B network switch?

Answer 10

For redundancy. The same data is transmitted “into” and “out of” each RDC over two channels in case there is some component failure (such as a FOX, network switch, etc.). So, two channels are for redundancy purposes to, ultimately, increase reliability that the data will arrive at the desired location.

Question 11

What EICAS message (status, caution, advisory, etc) is displayed for a RDC failure?

Question 12

What are the three major system components of the Common Core System?

Answer 12

1. CCR (Common Computing Resource) Cabinets
2. CDN (Common Data Network)
3. RDC (Remote Data Concentrators)

Question 13

The Remote Data Concentrator (RDC) can convert ARINC 664 data into what other formats?

Answer 13

1. ARINC 429
2. Analog
3. CAN Bus