Page 1 of 1 SB 601R---31---034 Apr 10/2008 

## 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. 1SB 601R---31---034 Page 1 of 16 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

SB 601R---31---034 Page 2 of 16 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

SB 601R---31---034 Page 3 of 16 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

SB 601R---31---034 Page 4 of 16 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.

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

SB 601R---31---034 Page 5 of 16 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

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

SB 601R---31---034 Page 6 of 16 Nov 19/2007 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.

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

SB 601R---31---034 Page 7 of 16 Nov 19/2007 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).

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

SB 601R---31---034 Page 8 of 16 Nov 19/2007 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

SB 601R---31---034 Page 9 of 16 Nov 19/2007 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

SB 601R---31---034 Page 10 of 16 Nov 19/2007 Revision A, Apr 10/2008 DCU Configuration Figure 1 LEGEND DCU 2

DCU 1rsb601r31034_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

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

SB 601R---31---034 Page 11 of 16 Nov 19/2007 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

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

SB 601R---31---034 Page 12 of 16 Nov 19/2007 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

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

SB 601R---31---034 Page 13 of 16 Nov 19/2007 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).

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

SB 601R---31---034 Page 14 of 16 Nov 19/2007 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.”

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

SB 601R---31---034 Page 15 of 16 Nov 19/2007 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

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

SB 601R---31---034 Page 16 of 16 Nov 19/2007 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. 1THANK YOU FOR ANSWERING THIS EVALUATION FORM! UPON COMPLETION OF THIS EVALU ATION 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: 

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• Illustration(s), figure(s), picture(s) and/or kit drawing(s) were helpful to carry out instructions. Comments: 

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• If a parts kit was required, did the kit contents received agree with the contents listed in the bulletin? Comments: 

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• Aircraft hands-on work was accomplished in estimated time. Comments: 

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• Overall, I was satisfied with this Service Bulletin. Comments: 

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PLEASE SUPPLY US WITH THE FOLLOWING DATA AND FAX TO (450) 476-7300: OPERATOR: NAME (Please print) SERVICE CENTER: TELEPHONE: AIRCRAFT SERIAL NO.: FACSIMILE: