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) and C16258AB (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.

### 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.

### 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.

### 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.

### 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.

### 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 serialnumber that has the letter D" at the end. NOTE: When the Thales Service Bulletin C16258A−27−006 is done, the letterD" 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 applicablelogbooks: Service Bulletin 670BA−27−069, Flight Controls − Stall Protection System − Replacement of the incorrectly Calibrated Angle-of-Attack (AOA) Transducer., incorporated."

### 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**

### 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. 1the evolution of mobility

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Operator: Service Centre: Name: Telephone or Fax: FAX your comments or feedback to (450) 476---7300 or e-mail to crj_sb_evaluation_form@aero.bombardier.com