# Bombardier Service Bulletin 8-57-43 Copy: SB 8_57_43_RB ("SB 8_57_43_RB"), 12 pages: PDF https://openairdocs.org/files/sha256/f9/7f/f97fa2be646a657ce9524c34607a215009baf9a3d8bb30ad223a84a0bd71fef9; text https://openairdocs.org/service-documents/bombardier/sb-8-57-43/file/f97fa2be646a.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2010-0805; AD 2010-26-13 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: 8-57-43 - Latest revision known: 8-57-43, Revision B, dated October 7, 2009 (OpenAirDocs) - Page: https://openairdocs.org/service-documents/bombardier/sb-8-57-43 ## ADs that cite it (2) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2011-26-05](https://openairdocs.org/ad/2011-26-05.md), effective Jan 23, 2012: Revisions A and B - [AD 2010-26-13](https://openairdocs.org/ad/2010-26-13.md), effective Feb 1, 2011: Revisions A and B Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-8-57-43/proposed.md). ## Text (12 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2010-0805; AD 2010-26-13 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 (OCR) DHC-8 (DASH 8) SERVICE BULLETIN 8-57-43 Wings - Replacement of Support Bracket for Aileron Input Quadrant - ModSum 8Q101250 This page transmits Revision 'B' of Service Bulletin 8-57-43, pages 1 thru 10, dated 07 Oct 2009. This service bulletin is re-issued in its entirety for the reasons that follow: - the format of this service bulletin is updated to the latest standard. Revision bars are not applied to any format changes. Revision bars are applied only beside subject matter to identify technical changes or new information - the Effectivity section is revised to update the "In-Service" effectivity, to include Mod8/2160 and ModSum 8Q101311 into the "Production" statement, to include a new "NOTE" and to update the "Spares Affected" section - the Reason section is revised to clarify the information - the Compliance section is revised to update status from "operators discretion" to "earliest opportunity" - the statement in the Approval section is revised to reflect the Design Approval Organization number - the Material - Price and Availability section is revised to include the Kit Numbers and to show the latest Bombardier Aerospace Sales Administrator address and phone number - the References section is revised to convey the latest revision of the service bulletin and engineering documentation - the Existing Parts Accountability table in the MATERIAL INFORMATION section is revised to delete incorrect information the ACCOMPLISHMENT INSTRUCTIONS have been revised as follows: - the part number (p/n) of the support brackets in step (3), sub steps (b) and (c) are revised. Was 824539-001 or -002. Now 828562-001 or -002 (accordingly) - the p/n of the support brackets in step (3), sub steps (g), (h), (i) and i) are revised. Was 825439-001 or - 002. Now 8Z5439-051 or - 052 (accordingly) Revision 'B' 07 Oct 2009 ### Page 2 (OCR) The Compliance recommendation to incorporated ModSum 8Q101250 has been upgraded from "operators discretion" to "earliest opportunity". Operators should plan accordingly. No rework to the aircraft is introduced by this revision. Operators that have incorporated a previous issue of this service bulletin are unaffected by this revision. Remove Service Bulletin 8-57-43 revision 'A' dated 17 Jan 2003 and replace with attached. Previous issues of Service Bulletin 8-57-43: Initial issue - Pages 1 thru 10 dated 09 Aug 2002 Revision 'A' - Pages 1 thru 10 dated 17 Jan 2003 ### Page 3 (OCR) de HAVILLAND BOMBARDIER DASH8 SERVICE BULLETIN Customer. Support ATA SYSTEM: 5712 NUMBER: 8-57-43 SUBJECT: Wings - Replacement of Support Bracket for Aileron Input Quadrant - ModSum 8Q101250 NOTE: ALL FUTURE INSTALLATIONS OF SUPERCEDED SERVICE BULLETIN 8-57-27 WILL BE DONE BY THIS SERVICE BULLETIN. 1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 301, 311, 314 and 315 Serial Numbers 100 thru 530. Production: ModSum 8Y100965 will be incorporated before delivery on applicable DHC-8 Aircraft Model 301, 311, 314 and 315 Serial Number 560 thru 609. ModSum 8Q101311 will be incorporated before delivery on applicable DHC-8 Aircraft Model 301, 311, 314 and 315 Serial Number 610 and subsequent. Mod 8/2160 will be incorporated before delivery on applicable DHC-8 Aircraft Model 301, 311, 314 and 315 Serial Number 531 thru 559 and subsequent. NOTE: The instructions in this Service Bulletin are only applicable to the systems and parts installed at the time of delivery on the aircraft or as changed by Bombardier Aerospace Service Bulletin(s). Before you do this bulletin, examine all STC or equivalent action changes to make sure this bulletin can be completed. 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 1 of 10 LS ### Page 4 (OCR) SERVICE BULLETIN 8-57-43 Spares Affected: The following is a list of spares affected by this change. Review spares and procurement systems to determine the existence of any listed parts. See Paragraph II.D., Existing Parts Accountability, for disposition. Part Number Description Deleted Deleted Deleted Deleted 85711569 Bracket Aileron Input Quadrant (Pre Mod 8/2160) 85711569 Bracket Aileron Input Quadrant (Pre Mod 8/2160) B_ Reason Problem: Operators have reported that sheet metal aileron input quadrant brackets have been found cracked during inspection. Failure of this mounting bracket may result in reduced aileron control. Solution: This service bulletin introduces new aileron input quadrant brackets (part number 828562-001 and - 002) as a replacement for existing aileron input quadrant brackets. The new aileron input quadrant brackets are manufactured using a machining process instead of the previous sheet metal or casting method. The machining process makes a stronger quadrant bracket, compared to sheet metal, which will minimize the possibility of cracks occurring. C. Description Access panels are removed and the aileron input quadrant on the left and right hand wing rear spar and quadrant mounting brackets are removed. New mounting brackets are installed with rivets and lockbolts. The aileron input quadrants are re-installed. The aileron control system is functionally tested. All access panels are re- installed. D. Compliance Bombardier Inc. recommend that ModSum 8Q101250 be incorporated at the earliest opportunity unless otherwise directed by the operator's airworthiness authority. 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 2 of 10 LS ### Page 5 (OCR) SERVICE BULLETIN 8-57-43 E. Approval The technical content of this Service Bulletin has been approved under the authority of the Transport Canada Civil Aviation (TCCA) Design Approval Organization No: DAO #93- Q-02. Manpower Approximately 36 man-hours will be required to accomplish this modification. This estimate is for direct labour performed by an experienced crew and it does not include set-up, planning, familiarization, cure time, part fabrication, tool acquisition or lost time. G. Material - Price and Availability ModKit 8DK4072-001 and -002 are available through the Customer Accounts Service Team at Bombardier Aerospace Regional Aircraft division. Operators should submit a purchase order specifying aircraft serial numbers) to: Bombardier Aerospace Customer Accounts Services Team (Mail Stop N11-32) 123 Garratt Blvd. Toronto Ontario Canada M3K - 1Y5 Facsimile: (416) 375-3060 Telephone: (416) 375-3920 H. Tooling - Price and Availability None Weight and Balance Moment A/C Type and Weight (Lb) Arm (Inches) (Inches x Lb) Model × 0.001 DHC-8 Model 301 + 0.944 427.80 0.40 DHC-8 Model 311 + 0.944 427.80 0.40 DHC-8 Model 314 + 0.944 427.80 0.40 DHC-8 Model 315 + 0.944 427.80 0.40 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 3 of 10 LS ### Page 6 (OCR) SERVICE BULLETIN 8-57-43 Electrical Load Data Not affected K. Publications Affected Weight and Balance Manual.................... PSM 1-83-8 Modification Manual................................ PSM 1-813-12 L. References Revision 'B' of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8DK4072 1 85712191 825439 1 PCA 2970R1 - (tor internal use only). ModSum 8Q101250 Rev - B. ModSum 8Y100965 Rev -A ModSum 8Q101311 Rev -A Mod 8/2160 Issue _5 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 4 of 10 LS ### Page 7 (OCR) SERVICE BULLETIN 8-57-43 2. MATERIAL INFORMATION A. Parts Required Per Aircraft Detailed Parts List for Modification Kits 8DK4072-001 and -002 (Drawing Kit- Retrofit-Machined Aileron Quadrant Bracket): THE DESIGN OF THE PART IN THIS DRAWING HAS BEEN APPROVED BY DE HAVILLAND INC. FOR MANUFACTURE BY OR ON BEHALF OFT Quantity Per Kit Part Number Description Remarks -001 -002 1 1 85712191 Bracket Assy, Outer Wing drwg. only Rear Spar 1 8Z5439 Retrofit Assy & Instin, drwg. only Machined Support Bracket, Aileron Input Quadrant (2) In addition to the above parts, the following materials are required for the completion of this modification and are to be procured by the operator directly from industry sources. Quantity Per Kit Part Number Description Remarks -001 -002 5 5 HL86-6 HI LOK Tension Collar Note 3 and 6 of 8DK4072 HL326-6-6 HI LOK Tension Pin Note 3 and 6 of 8DK4072 5 HL326-6-5 HI LOK Tension Pin Note 3 and 6 of 8DK4072 BO205016AD5-8 Rivet Note 3 and 6 of 8DK4072 16 14 BO205016AD5-6 Rivet Note 3 and 6 of 8DK4072 11 11 BO205016AD5-5 Rivet Note 3 and 6 of 8DK4072 2 CSP306-5 Packer Note 2 of 8DK4072 85712191-002 Bracket Assy Note 2 and 4 of 8DK4072 1 85712191-001 Bracket Assy Note 2 and 4 of 8DK4072 1 8Z8562-002 Support Bracket Assy Note 2 and 5 of 8DK4072 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 5 of 10 LS ### Page 8 (OCR) SERVICE BULLETIN 8-57-43 Quantity Per Kit Part Number Description Remarks -001 -002 8Z8562-001 Support Bracket Assy Note 2 and 5 of 8DK4072 1 8Z5439-052 Support Bracket Drilled Note 5 of 8DK4072 8Z5439-051 Support Bracket Drilled Note 5 of 8DK4072 1/4 pint Alodine Protective Coating 2 oz. DHMS C4.01 Epoxy Primer F19 Primer Type 2 Green DHMS C4.01 is available from: Tempo Paint & Varnish Co., Div. of Tower Chemicals Co., 205 Fenmar Drive, Weston, Ont. Canada M9L 2X4 Telephone: (416) 746-2233 or Tristar Coatings Div., Trebor Industries Ltd. 18 Cadetta Rd., R.R.9 Brampton, Ont., Canada L6T 3Z8 Telephone: (905) 794-1100 or Akzo Nobel, Rijksstraatweg 31, 2170 AJ Sassenheim Netherlands Telephone: (3171) 308 2905 B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 6 of 10 LS ### Page 9 (OCR) SERVICE BULLETIN 8-57-43 D. Existing Parts Accountability Existing New Part Part Number Description Qty. IC DC Number PNC Deleted Deleted Deleted Deleted Deleted Deleted 85711569 Bracket Aileron Input ¡ DIS 1825439-051 S 85711569 Quadrant (Pre Mod 8/2160) C DIS 8Z5439-052 S IC Interchangeability Code Not interchangeable. Neither part can be exchanged for the other. B Removed Part. No direct replacement. C Conditionally Interchangeable. Installation of superseded part negates the intent of this service bulletin. DC Disposition DIS Discard Part. MUI Multiple Usage Item: Return to stock if serviceable. RWK • Rework existing part in accordance with this service bulletin. RWI Rework existing part per SAL Salvage. Return to operator's stores for salvage consideration. PNC Part Number Code N No equivalent Bombardier Inc. part number for reworked part. Indicate on part that this service bulletin has been accomplished. Part number after rework. Superseding or equivalent part number. Reworked part and superseding part are functionally and physically equivalent but not identical. 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 7 of 10 LS ### Page 10 (OCR) SERVICE BULLETIN 8-57-43 3. ACCOMPLISHMENT INSTRUCTIONS A. Job Set-Up (1) Make sure that the nose gear ground lock is engaged. (2) Make sure that the MLG lock pins are installed. (3) Gain access to the flight deck. Apply electrical power to the aircraft buses. (4) Make sure that the flap area is clear of equipment and personnel, then extend the flaps to the 35 degree position. (5) Placard and select all aircraft electrical power to OFF. Obey all relevant WARNINGS and CAUTIONS detailed in Maintenance Manual PSM 1-83-2. Set up work platforms or ladders under the left and right side aileron. Make sure that the work platforms or ladders are electrically grounded. (7) Remove access panels 525AT (left wing) and 625AT (right wing). (8) Remove each aileron terminal quadrant from the quadrant support bracket (ref. PSM 1-83-2 Chapter 27-12-31 AILERON TERMINAL QUADRANT MAINTENANCE PRACTICES - Removal/Installation). Procedure (1) Remove each aileron input quadrant and support bracket (support bracket) as follows: Carefully remove all attaching lock bolts, Hi-Lok pins, collars, rivets and saddle washers that are used to secure each existing support bracket to the rear spar (at Yw 413.730 left and right wing). Do not elongate the holes thru the rear spar. (2) Clean out the open holes in the rear spar as required. Treat open rivet holes using Alodine 1200, 1200S or 1201. Clean out all unwanted material (ie. drillings and rivet ends) from inside the related wing. (3) Install new support brackets 8Z8562-001 (-002) as follows: Make a mylar or clear rigid plastic template (one for each support bracket) that duplicates the existing rivet hole pattern thru the flange of the existing 09 Aug 2002/ S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 8 of 10 ILS ### Page 11 (OCR) SERVICE BULLETIN 8-57-43 left and right wing support bracket. (b) Align and attach the left side template to the flange of the new left side support bracket 828562-001. (c) Align and attach the right side template to the flange of the new right side support bracket 828562-002. NOTE: Make sure that the templates are attached to the correct support bracket (left to left side and right to right side). (d) Locate the positions of the four Hi-Lok holes thru each support bracket (ref. drawing 8Z5439 detail view - 001 INSTN and -002 INSTN). Pre- drill the four Hi-Lok holes thru each support bracket to 0.177 inch diameter and ream 0.1860/0.1880 inch diameter. Locate the positions of the twenty four holes for the BO20501 16AD5 rivets thru each support bracket. Open up the related pilot holes in the flange of each support bracket from 0.159 to 0.162 inch. diameter. Deburr all holes. Treat open holes using Alodine 1200, 1200S or 1201 and prime with epoxy chromate primer. (9) Temporally attach support bracket assembly 825439-051 in position to the rear spar (left hand side) using a few gripping pins. (h) Temporally attach support bracket assembly 825439-052 and two bracket 85712191-001 and -002 to right hand spar using same method. NOTE: Use a grip gauge to check material thickness at all holes prior to installing rivets. Rivet lengths may vary for each installation. Secure left hand support bracket 825439-051 to rear spar using four Hi-Lok Tension Pins HL326-6-5, four Hi-Lok Tension Collars HL86-6 and twenty four rivets BO205016AD5-5 and -6 as depicted on 825439 detail view for the -001 INSTN Secure right hand support bracket 8Z5439-052, bracket 85712191-001 and bracket 85712191-002 to wing rear spar using twenty four rivets BO205016AD5-5 and -6, two Hi-Lok Tension Pins HL326-6-6, two Hi-Lok Tension Pins HL326-6-5, two saddle washers CSP306-5, four Hi-Lok Tension Collars HL86-6 as depicted on 8Z5439 detail view for the - 002 INSTN. 09 Aug 2002 S.B.8-57-43 Revision 'B' 07 Oct 2009 Page 9 of 10 LS ### Page 12 (OCR) SERVICE BULLETIN 8-57-43 Close Out (1) Re-install the aileron terminal quadrant to the quadrant support bracket (ref. PSM 1-83-2 Chapter 27-12-31 AILERON TERMINAL QUADRANT MAINTENANCE PRACTICES Removal/Installation). (2) Do a functional test of the aileron control system refer to PSM 1-83-2 Chapter 27-12-00 AILERON CONTROL SYSTEM - MAINTENANCE PRACTICES Adjustment/Test. (3) Re-install all access panels that were opened to do the task. (4) Remove all tools and equipment from the work area. (5) On incorporation of this ModSum, add the weight and balance data shown in Section I of this service bulletin to the Weight and Balance Manual PSM 1-83-8. Under 'Description of Change' enter "ModSum 8Q101250 incorporated." (6) On incorporation of this ModSum make an entry that conforms to local regulatory requirements in the applicable logbooks). Enter component serial numbers if applicable. Enter this ModSum number only after complete and functional incorporation of all work defined in this service bulletin is embodied. 09 Aug 2002 S.B. 8-57-43 Revision 'B' 07 Oct 2009 Page 10 of 10 ILS --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). 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