# Bombardier Service Bulletin 8-76-02 Copy: No revision named ("U.S. DOT/FAA - Service Information - 1"), 14 pages: PDF https://openairdocs.org/files/sha256/6b/51/6b51f6518b29d08b1738f91fccaf0ba5f8e03e387fce9bb1a0cddc6ca554cd59; text https://openairdocs.org/service-documents/bombardier/sb-8-76-02/file/6b51f6518b29.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0190; AD 2012-05-07 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: 8-76-02 - Page: https://openairdocs.org/service-documents/bombardier/sb-8-76-02 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2012-05-07](https://openairdocs.org/ad/2012-05-07.md), effective Apr 4, 2012: No revision named ## Text (14 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0190; AD 2012-05-07 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 8-76-02 Engine Controls - Power Levers - Installation of New Friction Brake Nut on the Power Lever Damper Adjusting Screw - Modification No. 8/0443 This page transmits Revision 'A' of Service Bulletin 8-76-02, pages 1 thru 12 dated 25 Jan 2012. This service bulletin is re-issued in its entirety for the reasons that follow: - the Compliance recommendation of this service bulletin has changed. A Transport Canada Airworthiness Directive is pending. No rework is introduced into this revision. Operators that have accomplished the initial issue of this service bulletin are unaffected - the format of this service bulletin is updated to the latest Bombardier standard. Revision bars are not applied to any format or editorial changes. Revision bars are applied only beside subject matter to identify technical changes or new information - the SUBJECT block is revised as follows: was "Installation of New Stop", now "Installation of New Friction Brake Nut" - removed aircraft serial number 1 and 2 from the In-Service part of the Effectivity section - the Reason part of the PLANNING INFORMATION section is revised to clarify the information - the Description and Approval sections are revised to include additional information / new information - the Manpower section is revised to show a breakdown of the man-hours required to do the job - the Material - Price and Availability section is revised to include a table containing the Kit Number and Description of the required kit. Also included is the latest Bombardier Aerospace Sales Administrators contact information - the References section is revised to convey the latest revision of this service bulletin and related engineering documentation Revision 'A' dated 25 Jan 2012 ### Page 2 (OCR) - the Existing Parts Accountability section is revised to include a table that determines disposition of the main parts removed - the Job Set-Up part of the ACCOMPLISHMENT INSTRUCTIONS section is revised to include additional set-up steps - the Procedure part of the ACCOMPLISHMENT INSTRUCTIONS section is revised to include edit changes that clarify some of the steps, to include references to new Figures 1, 2, 3 and 4, to include new Figures 1, 2, 3 and 4 and new steps (7), (8), (10) (a), (b) and (c) and (12) (a) thru (e). Remove the initial issue of Service Bulletin 8-76-02 and replace with attached. Previous issue(s) of Service Bulletin 8-76-02: Initial issue - Pages 1 and 2 dated 24 Jan 1986 ### Page 3 (OCR) de HAVILLAND BOMBARDIER DASH8 SERVICE BULLETIN Customer_ Support ATA SYSTEM: 7600 NUMBER: 8-76-02 BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS SUBJECT: Engine Controls - Power Levers - Installation of New Friction Brake Nut on the Power Lever Damper Adjusting Screw - Modification No. 8/0443 1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 102, 103, 106 Serial Numbers 3 thru 39. 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. Spares Affected: None 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 1 of 12 LS ### Page 4 (OCR) SERVICE BULLETIN 8-76-02 B. Reason Problem: With the adjusting knob of the power lever friction brake fully loosened a leaf spring may contact the flight idle gate (refer to Figure 2) due to short friction brake nut shoulder. This condition would allow the gate to be raised without the pilot lifting the triggers. Solution: The existing friction brake nut is removed and replaced with a new wider friction brake nut (refer to Figure 4). The new friction brake nut provides a positive stop for the friction adjuster. C. Description The procedures in this service bulletin give the instructions to do the tasks that tollow: - two center console covers are removed - the power lever friction knob is removed - the existing friction brake nut is removed and replaced with a new friction brake nut - the power lever friction knob is reinstalled and adjusted as necessary - an operational test of the power lever friction brake is done - close out. D. Compliance Bombardier Inc. highly recommend that Modification 8/0443 be incorporated at the earliest opportunity unless otherwise directed by the operator's airworthiness authority. A Transport Canada Airworthiness Directive Pending 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. This Service Bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs). 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 2 of 12 LS ### Page 5 (OCR) SERVICE BULLETIN 8-76-02 F. Manpower It will take an estimated 2.5 man-hours to complete this service bulletin. The breakdown of the man-hours is shown in the table that follows: TASK MAN-HOURS Job Set-Up 0.25 Procedure 2.00 Close-Out 0.25 For any on-site labor assistance, please speak with a Fleet Services representative for a quote. The Fleet Services group can be contacted via the Q Series Technical Help Desk by telephone at 416-375-4000 or email at : thd.qseries@aero.bombardier.com G. Material - Price and Availability The ModKit listed below is available through the Customer Accounts Service Team at Bombardier Aerospace Regional Aircraft division. Operators should submit a purchase order specifying aircraft serial number (s) 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 Kit Number Description 8MK0443-001 Friction Brake Nut - Center Console - Rework 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 3 of 12 LS ### Page 6 (OCR) SERVICE BULLETIN 8-76-02 H. Tooling - Price and Availability None I. Weight and Balance None J. Electrical Load Data Not affected K. Publications Affected Dash 8 Illustrated Parts Catalogue ............ PSM 1-8-4 Modifications Manual ............ PSM 1-813-12 References Revision 'A' of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8MK0443 1 8Z1850 Modification 8/0443 Issue 2 PCA 7056 Revision 0 (for internal reference only) A Transport Canada Airworthiness Directive Pending All Operator Message No. 984 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 4 of 12 ILS ### Page 7 (OCR) SERVICE BULLETIN 8-76-02 2. MATERIAL INFORMATION A. Parts Required Per Aircraft (1) Modification Kit 8MK0443-001 (2) Detailed Kit Content Quantity Per Kit Part Number Description Remarks -001 2 AN960D516L Washer MS24665-153 Cotter Pin 1 87610336-101 Friction Brake Nut A/R MS20995C32 Lockwire 1 821850 Rework Drawing 8MK0443 Kit Drawing B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None D. Existing Parts Accountability The following parts may be affected by this service bulletin. Indented parts are components of the next higher assembly. The quantity (Qty.) column lists the quantity that may be affected per aircraft for non-indented parts and the quantity per next higher assembly for indented parts. Existing New Part Part Number Description Qty. | IC DC Number PNC 87610073-101 Friction Brake 1 C DIS 87610336-101 S Nut IC Interchangeability Code A Not interchangeable. B Removed Part. No direct replacement. C Conditionally Interchangeable. Installation of superseded part negates the intent of this service bulletin. 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 5 of 12 LS ### Page 8 (OCR) SERVICE BULLETIN 8-76-02 DC Disposition Discard Part. MU Multiple Usage Item: Return to stock if serviceable. RWK Rework existing part in accordance with this service bulletin. RWI Rework existing part per ..... 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. R Part number after rework. S Superseding part number. Reworked part and superseding part are functionally and physically equivalent but not identical. 3. ACCOMPLISHMENT INSTRUCTIONS A. Job Set-Up (1) Make sure aircraft electrical power is OFF and observe safety precautions (refer to Maintenance Manual PSM 1-8-2, Chapter 24). (2) Make sure that lock pins are installed thru each main gear and main gear door mechanism. (3) Make sure the nose gear ground lock is engaged. (4) Gain access to the power lever friction knob (aft end of center console) refer to Figure 3. B. Procedure (1) Remove and retain eight bolts NAS5002-2 and eight washers AN960D8L securing cover assembly 87610180-001 to centre console pedestal. Retain cover (refer to Figure 1 detail A). (2) Remove and retain eight bolts NAS5002-2 and eight washers AN960D8L securing aft cover assembly 87610097-001 (or - 103) refer to Figure 1 detail B. (3) Permit cover assembly 87610097-001 (or -103) to hang loosely on friction brake shaft. (4) Remove existing cotter pin MS24665-153, pin MS20392-2C27 and related washer AN960D10L securing existing friction brake nut 87610073-001 to power control link 87610034-101. Retain pin MS20392-2C27 and washer AN960D10L (refer to Figure 3). 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 6 of 12 LS ### Page 9 (OCR) SERVICE BULLETIN 8-76-02 (5) Unscrew friction knob carefully to remove existing friction brake nut 87610073-101. Discard nut 87610073-101 and retain washers AN960D516L (refer to Figure 3). (6) Install new friction brake nut 87610336-101 to screw 87610084-101 such that pin MS20392-2C27 can be installed. Do not install cotter pin at this time (refer to Figure 3). (7) Measure the gap between friction nut and friction block at location shown (refer to Figure 3). (8) If required, with friction pad just touching friction block (refer to Figure 2) install washers AN960D516L to achieve a 0.060/0.075 inch gap between washer and nut (refer to Figure 3). (9) Install pin MS20392-2C27, washer AN960D10L and cotter pin MS24665-153 securing power screw to power control link (refer to Figure 3). (10) After completion of rework do an operational check of the power lever friction brake as follows: (a) Slowly rotate the friction brake knob (for power lever) clockwise to lock the power levers in position. Make sure lever restraint increases proportionally with application of increased friction. (D) Slowly rotate the friction brake knob in a counterclockwise direction to release the power levers. Make sure lever restraint decreases proportionally with decreased friction. (c) With the friction brake fully released move each power lever through full range of travel, make sure that the levers move smoothly without any binding. (11) Install previously removed cover assemblies using retained hardware. (12) Do the Functional Check of the Power Levers as follows: (a) With the power lever friction knob set to the lowest friction setting, move the power levers to approximately 28 deg. forward of the flight idle setting. (b) Without raising the trigger, move the No. 1 power lever aft with a sharp pull of approximately 30 pounds. Make sure the lever cannot pass the flight idle gate. (c) Without raising the the trigger, move the No. 2 power lever aft with a sharp pull of approximately 30 pounds. Make sure the lever cannot pass the flight idle gate. (d) Repeat steps (a) thru (c) four times. 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 7 of 12 LS ### Page 10 (OCR) SERVICE BULLETIN 8-76-02 (e) Without raising the trigger, move the No. 1 and No. 2 power levers with a sharp pull of approximately 30 pounds. Make sure both levers cannot pass through the flight idle gate. C. Close Out (1) Remove all tools and equipment from the work area. (2) On incorporation of this modification, make an entry that conforms to local regulatory requirements in the applicable logbooks). Enter component serial numbers if applicable. Enter this modification number (8/0443) only after complete and functional incorporation of all work defined in this service bulletin. 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 8 of 12 LS ### Page 11 (OCR) SERVICE BULLETIN 8-76-02 POWER LEVER COVER 87610180-001 BOLT NAS5002-2 WASHER AN960D8L AFT COVER ASSEMBLY 87610097 BOLT NAS5002-2 WASHER AN960D8L Center Console Components - Removal/Installation Figure 1 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 9 of 12 LS ### Page 12 (OCR) SERVICE BULLETIN 8-76-02 FLT IDLE GATE FRICTION PAD (REF) - → X143.00 Z126.75 FRICTION BLOCK (REF) - View Looking on Left Side of Center Console Figure 2 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 10 of 12 LS ### Page 13 (OCR) SERVICE BULLETIN 8-76-02 SCREW / p/n 87610084-101 NUT was p/n 87610073-101 now p/n 87610336-101 PIN p/n MS20392-2C27 WASN 60D516L (Ret.) LOCKWIRE p/n MS20995C32 ROLL PIN (Ref) (SEE FIGURE 4) POWER LEVER FRICTION KNOB COTTER PIN p/n MS24665-153 - 0.060 / 0.075 INCH GAP (REF) WASHER POWER CONTROL LINK AN960D10L p/n 87610034-101 NOTE: WITH FRICTION PAD JUST TOUCHING FRICTION BLOCK (REF FIGURE 2) INSTALL WASHERS AS REQUIRED TO ACHIEVE 0.060 / 0.075 INCH GAP Section View A-A Figure 3 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 11 of 12 LS ### Page 14 (OCR) SERVICE BULLETIN 8-76-02 .500 .560 NUT p/n 87610073-101 (REF) Pre Mod 8/0443 0.50 NUT p/n 87610336-101 (REF) Mod 8/0443 Friction Brake Nut Pre / Post Mod 8/0443 Figure 4 24 Jan 1986 S.B. 8-76-02 Revision 'A' 25 Jan 2012 Page 12 of 12 LS --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.