# Bombardier Service Bulletin 670BA-27-069

Copy: No revision named ("FAA-2015-4811_SB-670BA-27-069"), 9 pages: PDF https://openairdocs.org/files/sha256/4c/8c/4c8c4ccc3c7a120dcb5f61fccee0e8d2dc3c1363b9f2ab13f27b9e69ec61d03e; text https://openairdocs.org/service-documents/bombardier/670ba-27-069/file/4c8c4ccc3c7a.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2015-4811; AD 2016-08-05 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md)
- Type: Service bulletin (Service Bulletin)
- Number: 670BA-27-069
- Page: https://openairdocs.org/service-documents/bombardier/670ba-27-069

## ADs that cite it (2) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2016-13-01](https://openairdocs.org/ad/2016-13-01.md), effective Jul 7, 2016: No revision named
- [AD 2016-08-05](https://openairdocs.org/ad/2016-08-05.md), effective May 18, 2016: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/670ba-27-069/proposed.md).

## Text (9 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2015-4811; AD 2016-08-05 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

the evolution of mobility
SB 670BA−27−069
Page 1 of 8
Mar 30/2015
 SERVICE BULLETIN
Technical
Publications
THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT ,
TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND THIS SERVICE BULLETIN TO THE NEW
OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT BOMBARDIER HAS INCLUDED THE NEW
OPERATOR ON THE DISTRIBUTION LIST .
SEND THIS SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR
ATA SYSTEM: 27−35 NUMBER: 670BA−27−069
SUBJECT:  Flight Controls − Stall Protection System − Replacement of the
Incorrectly Calibrated Angle-of-Attack (AOA) Transducer.
1. PLANNING INFORMATION
A. Effectivity
(1) Aircraft with the components that follow installed:
PART NUMBER:       C16258AA (601R59154−3)  andC16258AB (601R59154−5)
SERIAL NUMBERS:
217, 221, 222, 257, 476, 481, 505, 513, 536, 634A,
730, 929, 1514, 1524, 1564, 1597, 1613, 1674, 1721,
1826, 1865C, 2054C, 2097C, 2098C, 2143C, 2152B,
2164C, 2166C, 2212C, 2505C, 2539, 2602, 2612,
3018, 3019, 3021, 3022, 3023, 3024, 3025, 3026,
3027, 3028, 3029, 3046, 3047, 3054, 3055, 3056,
3057, 3058, 3059, 3068, 3069, 3070, 3071, 3072,
3074, 3075, 3076, 3077, 3078, 3080, 3081, 3082,
3084, 3085, 3086, 3087, 3088, 3089, 3091, 3092,
3093, 3094, 3095, 3096, 3097, 3118, 3122, 3150,
3151, 3166, 3194, and 3197.
Note: Serial number that have a suffix letter D have
the Thales Avionics Service Bulletin
C16258A−27−006 incorporated. (Example: S/N 217
or 217A becomes S/N217D). Thus they do not have
to be replaced.

### Page 2

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 2 of 8
Mar 30/2015
PART NUMBER:            C16258AA (601R59154−3) and     C16258AB (601R59154−5)
INSTALLED AT THE
TIME OF DELIVERY
ON CL−600−2C10
AIRCRAFT SERIAL
NUMBERS:
10002 thru 10999 [1]
INSTALLED AT THE
TIME OF DELIVERY
ON CL−600−2D24
and CL−600−2D15
AIRCRAFT SERIAL
NUMBERS:
15001 thru 15990 [1]
INSTALLED AT THE
TIME OF DELIVERY
ON CL−600−2E25
AIRCRAFT SERIAL
NUMBERS:
19001 thru 19990 [1]
SPARES:
Examine all spare parts. If a part with a serial
number listed above is found, it is necessary to
incorporate Thales Service Bulletin
C16258A−27−006.
ALL CL−600−2C10,
CL−600−2D15,
CL−600−2D24, and
CL−600−2E25,
AIRCRAFT
If parts with the serial numbers listed above are
installed on aircraft, but were not identified at the
time of delivery, on the same or on a different
aircraft model, it is necessary to incorporate Thales
Service Bulletin C16258A−27−006.
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 service bulletins. Before you do this service
bulletin, examine all Supplemental Type Certificates (STCs) and
Supplemental Type Approvals (STAs) or equivalent action changes
to make sure you can complete this service bulletin.

### Page 3

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 3 of 8
Mar 30/2015
B. Reason
(1) Condition
Some Angle-of-Attack (AOA) transducers P/N C16258AA and P/N C16258AB
were incorrectly calibrated. This can cause the stall protection system to not
operate correctly and result in a late activation of the stick pusher.
(2) Evidence
The manufacturer of the AOA transducer reported that the calibration fixture of
the AOA transducers, at the manufacturing plant and the repair facilities, were
misaligned and caused an incorrect calibration of some AOA transducers.
(3) Objective/Benefit
This service bulletin gives the list of the incorrectly calibrated AOA transducers
and the instructions to replace them.
Replacement of the affected AOA transducers will prevent late activation of the
stick pusher, if a stall occurs.
C. Description
The AOA transducer(s) with a serial number shown in Table 1 of the effectivity
section of this service bulletin is/are removed. The AOA transducer(s) is/are
installed.
D. Compliance
Recommended service bulletin.
Bombardier recommends that this service bulletin be done at no more than 5000
flight hours or no later than 24 months from the release date on this service bulletin,
whichever comes first, unless otherwise directed by the airworthiness authority of
the operator.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
Tolerance Inspections (DTIs).
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.

### Page 4

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 4 of 8
Mar 30/2015
F . Manpower
The man-hours given below are estimates for direct labor done by an experienced
crew on an aircraft prepared for maintenance.
These estimates do not include the time necessary for:
−Administrative functions such as planning, liaising, 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 as directly related to the
accomplishment of this procedure.
NOTE: For on-site labor assistance, please speak with a Fleet Services
representative for an estimate. Call the Fleet Services Team through the
CRC at 1−844−272−2720 (1−844−CRC−CRC0) or 1−514−855−8500 or
e-mail at thd.crj@aero.bombardier.com.
It will take an estimated 4.5 man-hours to complete this service bulletin. The
man-hours are divided in the table that follows (elapsed cure time is not included in
the man-hour summary given above):
TASK MAN-HOURS
(1)  Job Set-Up 0.25
(2)  Procedure 3.00
(3)  Test 1.00
(4)  Job Close-Out 0.25
NOTE: These estimates do not include the man-hours necessary to do Thales
Service Bulletin C16258A−27−006.

### Page 5

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 5 of 8
Mar 30/2015
G. Material − Price and Availability
There are no kits for this service bulletin.
(1) Refer to Thales Service Bulletin C16258A−27−006 for terms and conditions.
(2) Refer to paragraph 3.B. for a list of consumables for this service bulletin.
H. Tooling − Price and Availability
There are no tool kits for this service bulletin. Refer to paragraph 3.C for a list of
special tools and equipment for this service bulletin.
I. Weight and Balance
Not changed.
J. Electrical Load Data
Not changed.
K. References
Refer to the SB Introduction document for definition or explanation of service
bulletin content.
Restriction and/or Special Instruction RSI C−27−1648−00, Revision A
Thales Service Bulletin C16258A−27−006, dated Oct/26/2012
Aircraft Maintenance Manual (AMM)
For Bombardier reference only: PCA 76112
L. Other Publications Affected
None.
M. Relationship Chart
Not applicable.

### Page 6

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 6 of 8
Mar 30/2015
2. ACCOMPLISHMENT INSTRUCTIONS
Reference Information
REFERENCE DESIGNATION
AMM 27−35−05−000−801 Removal of Angle-of-Attack Transducer
AMM 27−35−05−400−801 Installation of Angle-of-Attack Transducer
A. Job Set-Up
(1) Refer to the procedure.
B. Procedure
NOTE: This procedure is applicable to the left and the right side. The procedure
that follows is written for the left side. The differences are given.
Refer to Figure 1 .
(1) Remove the affected AOA transducer (1) (refer to AMM task
27−35−05−000−801).
(2) Install the AOA transducer (1) with a serial number that is not found in the
table shown in the effectivity section of this service bulletin or with a serial
number that has the letter /quoteblleftD" at the end.
NOTE: When the Thales Service Bulletin C16258A−27−006 is done, the letter
/quoteblleftD" is added to the serial number of the AOA transducer.
C. Job Close-Out
(1) Remove all tools, equipment, and unwanted materials from the work area.
(2) When this service bulletin is completed, make this entry in the applicable
logbooks: /quoteblleft Service Bulletin 670BA−27−069, Flight Controls − Stall
Protection System − Replacement of the incorrectly Calibrated
Angle-of-Attack (AOA) Transducer., incorporated."

### Page 7

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 7 of 8
Mar 30/2015
AOA Transducer −  locator
Figure 1 (Sheet 1 of 1)
LEGEND
1. AOA transducer.
ba8421a01, kp, Jan. 20, 2015
A
1
LEFT SIDE SHOWN
RIGHT SIDE OPPOSITE
A

### Page 8

SERVICE BULLETIN  670BA−27−069
SB 670BA−27−069
Page 8 of 8
Mar 30/2015
3. MATERIAL INFORMATION
A. Kit Information
None.
B. Consumable Information
For a list of consumables, refer to the different tasks, the Thales service bulletin is
given as references in this service bulletin.
C. Special Tools and Equipment
For a list of special tools and equipment, refer to the different tasks, the Thales
service bulletin is given as references in this service bulletin.
D. Disposition of Parts
The table that follows shows the disposition of parts on the aircraft (or spares), and
the relationship between these parts to the new parts to be installed during the
incorporation of this service bulletin.
PRE-SB
PART NUMBER
NAME QTY DC POST -SB
PART NUMBER
C16258AA,
(601R59154−3)
C16258AB,
(601R59154−5)
AOA Transducer 2 MOD
C16258AA,
(601R59154−3)
C16258AB
(601R59154−5)
Disposition code (DC):
MOD: Modify part as shown in Thales Service Bulletin C16258A−27−006.
1

### Page 9

the evolution of mobility
THANK YOU FOR YOUR COMMENTS
SERVICE BULLETIN FEEDBACK FORM/COMPLIANCE SHEET
(YOUR COMMENTS HELP US WRITE BETTER SERVICE BULLETINS)
Service Bulletin No.: Revision:
Aircraft Serial Number: Date:
S T R O N G LY
DISAGREE
DISAGREE AGREE S T R O N G LY
AGREE
Instructions to do the service bulletin are
accurate.
Comments:
- - - -
Figure(s), picture(s), and/or Appendix
were helpful to do the service bulletin.
Comments:
- - - -
Part(s) or kit(s) agreed with the service
bulletin requirement.
Comments:
- - - -
The service bulletin was accomplished
within the estimated time given.
Comments:
- - - -
Overall, I was satisfied with this service
bulletin.
Comments:
- - - -
Operator: Service Centre:
Name: T elephone or Fax:
FAX your comments or feedback to (450) 476 - - -7300
or e-mail to crj_sb_evaluation_form@aero.bombardier.com

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