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Apr 10/2008 SB 601R---31---034

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET

CL ---600 ---2B19 Canadair Regional Jet (CRJ) Aircraft

SERVICE BULLETIN 601R ---31 ---034

SUBJECT: Indicating and Recording Systems --- General --- Data Concentrator

Unit (DCU ---4000) Update

This page transmits:

Revision A of Service Bulletin 601R --- 31 --- 034,

pages 1 thru 16, dated Apr 10/2008

The changes in this revision have no effect on aircraft that have

incorporated a previous issue of this service bulletin.

Reason:

Revised Planning Information, paragraph 1., to:

Remove aircraft serial numbers 8096 thru 8199 to the Effectivity section.

This revision also includes small editorial changes that do not have an effect on the

technical content.

Instructions:

Discard the copy of Service Bulletin 601R --- 31 --- 034, dated Nov 19/2007. Replace

with the copy attached.

Service Bulletin History:

Initial issue, dated Nov 19/2007.

1
SB 601R---31---034

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Nov 19/2007

Revision A, Apr 10/2008

SERVICE BULLETIN

Technical

Publications

THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED

HAS SOLD AIRCRAFT OR TRANSFERRED SPARES IN THE LAST SIX MONTHS, THIS SERVICE

BULLETIN MUST BE SENT TO THE NEW OWNER, UNLESS CONFIRMATION WAS RECEIVED

THAT BOMBARDIER REGIONAL AIRCRAFT DIVISION HAS INCLUDED THE NEW OPERATOR

AIRCRAFT, THIS SERVICE BULLETIN MUST BE SENT TO THE LESSEE. IF THE OPERATOR

ON THE DISTRIBUTION LIST.

ATA SYSTEM: 31 ---00 NUMBER: 601R ---31 ---034

SUBJECT: Indicating and Recording Systems --- General --- Data Concentrator Unit

(DCU ---4000) Update

1. PLANNING INFORMATION

A. Effectivity

(1) Aircraft Affected:

Service Bulletin: CL ---600---2B19 Canadair Regional Jet (CRJ) Aircraft Serial

Numbers 7003 thru 7067, 7069 thru 7990 and 8000 thru

8095.

Production: This change will be incorporated before delivery on Aircraft

Serial Numbers 8200 and subsequent.

NOTE: The instructions in this service bulletin are only applicable to the

systems and parts installed at the time of delivery of the aircraft or as

changed by Bombardier Aerospace Service Bulletin(s). Before you

do this bulletin, examine all STC, STA or equivalent action changes

to make sure this bulletin can be completed.
SERVICE BULLETIN 601R---31 ---034

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Nov 19/2007

Revision A, Apr 10/2008

B. Reason

(1) Condition

With the present Data Concentrator Unit (DCU) configuration the conditions

that follow exist:

− Some Flight Data Recorder (FDR) parameters are not recorded frequently

enough.

− The new wing tip switches for the Wing Anti Ice (WAI) will not operate.

− The new FDR option (128 wps, 42 parameters) cannot be installed.

(2) Evidence

Not applicable.

(3) Objective/Benefit

This service bulletin gives the procedure to update the DCUs.

This installation:

− Corrects the recording rate of some FDR parameters to obey regulations.

− Is a prerequisite for the new wing tip switches for the WAI.

− Is a prerequisite for the new FDR option (128 wps, 42 parameters).

C. Description

Circuit breakers are opened. The electrical power is removed. The DCUs are

changed.

For Aircraft with the Flight Data Recorder (FDR) Option (CR31 ---340)

The cover of the Integrated Avionics Processing System (IAPS) is removed. The

Configuration Strapping Units (CSUs) are removed. The strapping configuration of

Word 11 is changed. The CSUs and the IAPS cover are installed.

For all Aircraft

The circuit breakers are closed. The operational tests are done.
SERVICE BULLETIN 601R---31 ---034

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Nov 19/2007

Revision A, Apr 10/2008

D. Compliance

Recommended Service Bulletin. Bombardier Aerospace recommends that this

service bulletin be done at the earliest convenience of the operator, unless

otherwise directed by the airworthiness authority of the operator.

For Aircraft 7003 thru 7067 and 7069 thru 7389

NOTE: Service bulletin 601R---31---022, Indicating and Recording --- Engine

Indication and Crew Alert System (EICAS) --- EICAS 2000 Avionics

System Upgrade (CSUs, DCPs, DCUs, EFDs, IOCs, FMC, and MDC), is

a prerequisite to this service bulletin.

For all Aircraft

E. Approval

The technical content of this service bulletin has been approved under the authority

of the TCCA Design Approval Organization No: DAO #93---Q ---02.

F. Manpower

The man hours given below are an estimate for direct labor done by an

experienced crew on an aircraft prepared for maintenance.

This estimate does not include the time necessary for:

− Administrative functions such as planning, liaison, familiarization, and report writing.

− Non productive elapsed time such as rest time, having meals, and crew shift

changes.

− Elapsed time such as for paint to dry, sealant to cure, and fuel tank venting.

− Preparation for modification (unless specified in the accomplishment

instructions) such as cleaning and getting parts, tools, consumables, and

ground equipment.

− Quality assurance inspections, troubleshooting and/or correction of

discrepancies found when a task is done.

− All other activities that are not considered by Bombardier Aerospace as directly

related to the accomplishment of this procedure.
SERVICE BULLETIN 601R---31 ---034

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Nov 19/2007

Revision A, Apr 10/2008

It will take an estimated 2.50 man---hours to complete this service bulletin. The

man---hours are divided as shown in the table that follows:

TASK MAN ---HOURS

(1) Job Set ---Up 0.25

(2) Procedure 1.0

(3) Test 1.0

(4) Job Close---Out 0.25

Bombardier Aerospace does not cover the labor costs for this service bulletin.

G. Material --- Price and Availability

Refer to Rockwell Collins Service Bulletin DCU---4000---31---503.

H. Tooling --- Price and Availability

Refer to Rockwell Collins Service Bulletin DCU---4000---31---503.

I. Weight and Balance

Not changed.

J. Electrical Load Data

Not changed.

K. References

Modification Summary TC601R17138, Revision B1.

Aircraft Maintenance Manual, CSP A ---001, Revision 39.

Rockwell Collins Service Bulletin DCU---4000---31---503, dated Nov 15/07.

For Bombardier Aerospace reference only: PCA 4240 and 5470.
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Nov 19/2007

Revision A, Apr 10/2008

L. Other Publications Affected

Illustrated Parts Catalog (IPC) CSP A ---006 ........................

M. Relationship Chart

PRE ---SB

PART NUMBER NAME POST ---SB

PART NUMBER NAME

622---9820---007 or

622---9820---008 or

622---9820---009

DCU---4000 622---9820---010 DCU---4000
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Revision A, Apr 10/2008

2. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set ---Up

Reference Information

REFERENCE DESIGNATION

AMM 22---12---00---710---802 Operational Test of the IAPS

AMM 22---12---21---000---801 Removal of the CSU

AMM 22---12---21---400---801 Installation of the CSU

AMM 24---00---00---861---802 Remove Electrical Power to the Aircraft

AMM 24---00---00---910---801 Electrical/Electronic Safety Precautions

AMM 24---00---00---910---802 Electrostatic Discharge Safety Precautions

AMM 31---41---04---000---801 Removal of the DCU

AMM 31---41---04---400---801 Installation of the DCU

AMM 31---41---04---710---801 Operational Test of the DCU

(1) Obey all the electrical/electronic safety precautions

(Refer to AMM 24---00---00---910---801).

(2) Obey all the electrostatic discharge safety precautions

(Refer to AMM 24---00---00---910---802).

(3) Open the main avionics ---compartment door.
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Revision A, Apr 10/2008

(4) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME ZONE

CBP ---2 Q2 EICAS DCU 1 CH A 222

CBP ---2 Q3 EICAS DCU 1 CH B 222

CBP ---4 C10 EICAS DCU 1 CH A 222

CBP ---4 C11 EICAS DCU 1 CH B 222

CBP ---2 Q4 EICAS DCU 2 CH A 222

CBP ---2 Q5 EICAS DCU 2 CH B 222

CBP ---5 A6 EICAS DCU 2/3 311

For Aircraft with the 3rd DCU Option (CR31 ---001 or CR31 ---310)

(5) Open, safety, and tag the circuit breakers that follow:

CBP ---2 K6 EICAS DCU 3 CH A 222

CBP ---2 K7 EICAS DCU 3 CH B 222

For all Aircraft

(6) Remove electrical power from the aircraft

(Refer to AMM 24---00---00---861---802).
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Revision A, Apr 10/2008

B. Procedure

Refer to Figure 1.

(1) In the main avionics compartment, remove DCU 1 and DCU 2

(Refer to AMM 31---41---04---000---801).

NOTE: For the modification of the DCUs part number: 622---9820---007 or

622---9820---008 or 622---9820---009 into part number: 622---9820---010

refer to Rockwell Collins service bulletin DCU---4000---31---503.

(2) Install the new DCU 1 and DCU 2

(Refer to AMM 31---41---04---400---801).

For Aircraft with the 3rd DCU Option (CR31 ---001 or CR31 ---310)

(3) In the main avionics compartment, remove DCU 3

(Refer to AMM 31---41---04---000---801).

NOTE: For the modification of the DCUs part number: 622---9820---007 or

622---9820---008 or 622---9820---009 into part number: 622---9820---010

refer to Rockwell Collins service bulletin DCU---4000---31---503.

(4) Install the new DCU 3

(Refer to AMM 31---41---04---400---801).

For Aircraft with the (FDR) Option (CR31 ---340)

Refer to Figure 2.

(5) In the main avionics compartment, change the two CSUs (3) as follows:

(a) Remove the cover (2) of the IAPS Card Cage (ICC) (1).

(b) Remove the CSUs (3) (Refer to AMM 22---12---21---000---801).

(c) Loosen the seven screws (4) on the cover of the CSUs (3).

(d) Move the cover to connector P1 to access the DIP switches.

(e) Set the DIP switch No. 7 of WORD 11 as follows

(Refer to View C):

WORD DIP SWITCHES POSITION

11 7 DOWN

(f) Move the cover of the CSUs (3) away from the connector P1.

(g) Tighten the seven screws (4).

(h) Install the CSUs (3) (Refer to AMM 22---12---21---400---801).
SERVICE BULLETIN 601R---31 ---034

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Revision A, Apr 10/2008

(i) Record the new strapping configuration for WORD 11 on the placard as

follows (Refer to Views D and E):

WARNING: OBEY ALL OF THE SAFETY PRECAUTIONS WHEN YOU USE

ISOPROPYL ALCOHOL OR OTHER SOLVENTS TO CLEAN

THE WORK SURFACES. MAKE SURE THAT THERE IS A

SUFFICIENT SUPPLY OF FRESH AIR. USE PROTECTIVE

CLOTHING AND SAFETY GLASSES. IF THIS IS NOT DONE,

INJURIES TO PERSONS CAN OCCUR.

(j) With a cloth moist and isopropyl alcohol, remove the dark circle mark at

WORD 11 position 7 (Refer to view E).

(k) With an indelible ink pen, put a dark circle mark at WORD 11 position 7

to show the new strapping configuration position (Refer to view E).

(l) With an indelible ink pen, write service bulletin number 601R---31---034 at

the location given on the placard (5).

(m) Install the cover (2) of the ICC (1).
SERVICE BULLETIN 601R---31 ---034

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Revision A, Apr 10/2008

DCU Configuration

Figure 1

LEGEND

DCU 2

DCU 1

rsb601r31034_001.dg, om/lr, oct03/2007

1. Captive clamp.

2. DCU

3. Mounting tray.

4. Electrical connector.

2

1

FS379.00

A

A

DCU 3

622--9820--007 or 622--9820--008 or

622--9820--009 (Pre--Mod)

622--9820--010 (Post--Mod).

For option CR31--001 or CR31--310.

NOTE

1

1

3

4
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Revision A, Apr 10/2008

Configuration Strapping

Figure 2 (sheet 1 of 2)

rsb601r31034_002.dg, lr, oct03/2007

A

B

D

2

LEGEND

1. IAPS card cage (ICC).

1

2. Cover.

3. Configuration strapping unit (CSU).

4. Screw.

12345678

1 8

WORD 11

12345678

9 16

4

(7 PLACES)

3

CONNECTOR P1

(REF)

AIRCRAFT S/N

(REF)

C

C

B

B

A
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Revision A, Apr 10/2008

Configuration Strapping

Figure 2 (sheet 2 of 2)

rsb601r31034_003.dg, lr, oct03/2007

E

123 45678

1 8

WORD 11

123 45678

9 16

D

E

5

2

2. Cover.

5. Placard.

LEGEND
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Revision A, Apr 10/2008

For all Aircraft

C. Job Close ---Out

(1) Remove all tools, equipment, and unwanted materials from the work area.

(2) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME ZONE

CBP ---2 Q2 EICAS DCU 1 CH A 222

CBP ---2 Q3 EICAS DCU 1 CH B 222

CBP ---4 C10 EICAS DCU 1 CH A 222

CBP ---4 C11 EICAS DCU 1 CH B 222

CBP ---2 Q4 EICAS DCU 2 CH A 222

CBP ---2 Q5 EICAS DCU 2 CH B 222

CBP ---5 A6 EICAS DCU 2/3 222

For Aircraft with the 3rd DCU Option (CR31 ---001 or CR31 ---310)

(3) Remove the tags and close the circuit breakers that follow:

CBP ---2 K6 EICAS DCU 3 CH A 222

CBP ---2 K7 EICAS DCU 3 CH B 222

For all Aircraft

(4) Do the operational test of the of the DCU

(Refer to AMM 31---41---04---710---801).
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Revision A, Apr 10/2008

For Aircraft with the (FDR) Option (CR31 ---340)

(5) Do the test that follows:

(a) Set the MAINT switch to MFD1

(b) Open, safety, and tag the circuit breaker that follows:

CBP ---1 K2 FLIGHT REC CONT 221

(c) Make sure that an MDC current fault “RDC1 OFF /NO OUTPUT” is

shown on the pilot’s Multi Function Display (MFD).

(d) Remove the tags and close the circuit breaker that follows:

CBP ---1 K2 FLIGHT REC CONT 221

(6) Do the operational test of the of the IAPS

(Refer to AMM 22---12---00---710---802).

For all Aircraft

(7) When this service bulletin is completed, make this entry in the applicable

logbook(s): “Service Bulletin 601R---31---034, Revision A, Indicating and

Recording Systems --- General --- Data Concentrator Unit (DCU---4000)

Update, incorporated.”
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Revision A, Apr 10/2008

3. MATERIAL INFORMATION

A. Kit Information

None.

B. Consumable Information

For a list of consumables, refer to the different tasks and Rockwell Collins Service

Bulletin DCU---4000---31---503.

C. Special Tools and Equipment

For a list of special tools and equipment, refer to the different tasks and Rockwell

Collins Service Bulletin DCU---4000---31---503.

D. Disposition of Parts

The table that follows shows the disposition of installed parts on the aircraft (or

spares), and the relation of installed parts (or spares) to the new parts to be

installed with this service bulletin.

For Aircraft without the 3rd DCU Option (CR31 ---001 or CR31 ---310)

PRE ---SB

PART NUMBER

NAME QUANTITY DC POST ---SB

PART NUMBER

IC

622---9820---007

or

622---9820---008

or

622---9820---009

DCU---4000 2 RTN 622---9820---010 5

For Aircraft with the 3rd DCU Option (CR31 ---001 or CR31 ---310)

PRE ---SB

PART NUMBER

NAME QUANTITY DC POST ---SB

PART NUMBER

IC

622---9820---007

or

622---9820---008

or

622---9820---009

DCU---4000 3 RTN 622---9820---010 5
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Revision A, Apr 10/2008

For all Aircraft

Disposition code (DC):

RTN: Refer to the Rockwell Collins Service Bulletin DCU---4000---31---503.

Interchangeability Code (IC):

5: Parts are one---way interchangeable as a set.

1
THANK YOU FOR ANSWERING THIS EVALUATION FORM! 

UPON COMPLETION OF THIS EVALUATION FORM, FAX TO 450-476-7300 

SERVICE BULLETIN EVALUATION FORM 

(YOUR IDEAS WILL HELP US PROVIDE BETTER BULLETINS) 

SERVICE BULLETIN : ISSUE: 

 STRONGLY DISAGREE NEUTRAL AGREE STRONGLY 

 DISAGREE AGREE 

• Instructions to do the Service Bulletin 

were accurate. 

Comments:

    

• Illustration(s), figure(s), picture(s) and/or 

kit drawing(s) were helpful to carry out 

instructions. 

Comments:

    

• If a parts kit was required, did the kit 

contents received agree with the 

contents listed in the bulletin? 

Comments: 

    

• Aircraft hands-on work was 

accomplished in estimated time. 

 Comments:

    

• Overall, I was satisfied with this Service 

Bulletin. 

 Comments: 

    

PLEASE SUPPLY US WITH THE FOLLOWING DATA AND FAX TO (450) 476-7300: 

OPERATOR: NAME (Please print) 

SERVICE CENTER: TELEPHONE: 

AIRCRAFT SERIAL NO.: FACSIMILE: