# Bombardier Service Bulletin 84-28-08 Copy: No revision named ("U.S. DOT/FAA - Service Bulletin"), 12 pages: PDF https://openairdocs.org/files/sha256/97/2c/972cf13eda4ee903c4985a7a2010d9623240a398813c157c00a35c9732e10637; text https://openairdocs.org/service-documents/bombardier/sb-84-28-08/file/972cf13eda4e.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2011-0043; AD 2011-11-02 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: 84-28-08 - Page: https://openairdocs.org/service-documents/bombardier/sb-84-28-08 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2011-11-02](https://openairdocs.org/ad/2011-11-02.md), effective Jun 22, 2011: No revision named Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-84-28-08/proposed.md). ## Text (12 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2011-0043; AD 2011-11-02 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) de HAVILLAND BOMBARDIER DASH8 SERVICE BULLETIN Customer. Support ATA SYSTEM: 2811 NUMBER: 84-28-08 BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS SUBJECT: Fuel - Motive Flow Check Valve Bonding - Inspection and Rectification - ModSum 4-110020 1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001 thru 4190, 4199 thru 4201 and 4203 thru 4216 Production: ModSum 4-110020 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4259 and subsequent. ModSum 4F110020 confirms by visual conformation and by PCI - Serial Number Control Sheets that the following Aircraft Serial Numbers 4191 thru 4198, 4202, 4217 thru 4258 have the chem-filmed check valves. 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. 11 Mar 2010 S.B. 84-28-08 Page 1 of 10 RL ### Page 2 (OCR) SERVICE BULLETIN 84-28-08 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 2.D., Existing Parts Accountability, for disposition. Part Number Description 2960018-101 Motive Flow Check Valve with Serial Numbers 0001 thru 0409 and 3002 thru 3031 B. Reason Problem: An internal Production Quality Assurance inspection audit discovered that a batch of Motive Flow Check Valves (MFCV) installed in a few Q400 were manufactured with the threads of outlet fitting red anodized. Some of these units where installed on the aircraft. These check valves do not provide adequate electrical bonding from the MFCV outlet port to the adjacent fitting. The red anodized on the threads of the MFCV outlet fitting can result in ignition source within the fuel tank in the event of a lighting strike. Solution: This Special Inspection and Rectification Service Bulletin will verify which MFCV is installed on the aircraft and if required to remove and replace affected MFCV with an MFCV that contain the chemical filmed outlet fitting. This chemical filmed MFCV will improve the electrical bonding. C. Description The procedures in this service bulletin give the instructions to do the tasks that follow: - aircraft is position on level surface - aircraft Nose Landing Gear (NG) is lock and verified lock is engaged - Main Landing Gear (MLG) lock pins are installed thru each main gear and main gear door mechanism - the No. 1 and/or No.2 fuel tanks are defueled - aircraft electrical power is removed - grounded work platforms or ladders are setup - access panels 523AT and/or 623AT are removed - the No. 1 and/or No. 2 fuel tanks are vented - validating of proper configuration of MFCV 11 Mar 2010 S.B. 84-28-08 Page 2 of 10 RL ### Page 3 (OCR) SERVICE BULLETIN 84-28-08 - if required, removal of MFCV - continuity testing of newly installed Motive Flow Check Valve (MFCV) - installation and sealing of removed access panels 523AT and/or 623AT - the tanks are refueled - operational test - log book entries are made - close out. D. Compliance This special inspection and rectification conveyes that ModSum 4-110020 in this service bulletin should be accomplished at the earliest practical maintenance period unless otherwise directive by the Operator's Airworthiness Authority. An Airworthiness Directive (AD) from Transport Canada is 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). F. Manpower It will take an estimated 31 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 18.00* Procedure 6.00 Test / RTS 1.00 Close-Out 8.00** * estimated time to defuel and venting of fuel from tanks * estimated time per side. ** cure time for sealant NOT included 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 11 Mar 2010 S.B. 84-28-08 Page 3 of 10 RL ### Page 4 (OCR) SERVICE BULLETIN 84-28-08 G. Material - Price and Availability Refer to the Material Information section in the enclosed Parker vendor service bulletin No. 2960018-28-001. 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 1-84-4 ModSums Manual .. .. PSM 1-84-12 L. References The initial issue of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8SC0764 ModSum 4-110020 Rev. 'A' ModSum 4F110020 Rev. 'A' Parker Service Bulletin Number 2960018-28-001 date Jan 7, 2010 PCA 42814 Revision 0 (for internal reference only) 11 Mar 2010 S.B. 84-28-08 Page 4 of 10 RL ### Page 5 (OCR) SERVICE BULLETIN 84-28-08 2. MATERIAL INFORMATION A. Parts Required Per Aircraft Refer to the Material Information section in enclosed Parker vendor service bulletin No. 2960018-28-001. 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 2960018-101 Motive Flow 2 A DIS N Check Valve with Serial Numbers 0001 thru 0409 and S/N 3002 thru 3031 C Interchangeability Code Not interchangeable. 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. 11 Mar 2010 S.B. 84-28-08 Page 5 of 10 RL ### Page 6 (OCR) SERVICE BULLETIN 84-28-08 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 or equivalent 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 that lock pins are installed thru each main gear and main gear door mechanism. (2) Make sure the nose gear ground lock is engaged. (3) Pressure defuel fuel tanks. Ref to applicable instruction in PSM 1-84-2, AMM Chapter 12, TASK 12-10-28-650-802. (4) Placard and select all aircraft electrical power to OFF. Obey all relevant WARNINGS and CAUTIONS (refer to PSM 1-84-2, AMM Chapters 12 and 24 Set up the work platforms or ladders around and/or under the left (and/or right) wing as required to gain access to the fuel tanks. Make sure the work platforms or ladders are electrically grounded. Remove the left and/or right outer wing panels that follow. Refer to PSM 1-84-2, AMM Chapter 57, TASK 57-21-01-000-801: Prepare fuel tank for access. Make sure no fuel or fuel vapors are present before working on aircraft. Refer to applicable instruction in PSM 1-84-2, AMM Chapter 28, TASK 28-10-00-840-801. B. Procedure Part A - Inspection (1) If you observe the MFCV with red anodize on the outlet fitting threads. Refer to B. Procedures, Part B - Rectification section. NOTE: Refer to Parker Service Bulletin 2960018-28-001, Para 1.D. Description, for visual examples of red anodized check Valve outlet and improved Chem-filmed Check Valve outlet. (2) If you observe the MFCV with chemical film color (gold) on the threads of the outlet fitting. Then proceed to section C. Close Out. Part B - Rectification (1) Remove MFCV with red anodize on the outlet fitting threads as to the applicable instructions in PSM 1-84-2, AMM Chapter 28, TASK 28-11-11-000-801. 11 Mar 2010 S.B. 84-28-08 Page 6 of 10 RL ### Page 7 (OCR) SERVICE BULLETIN 84-28-08 (2) Install MFCV with chemical film coating on the outlet fitting threads as to the applicable instruction PSM 1-84-2, AMM Chapter 28, TASK 28-11-11-400-801. NOTE: Make sure you do an electrical bonding check on the chemical film coating on the MFCV outlet fitting using one of the electrical bonding testers specified in PSM 1-84-3, Structural Repair Manual (SRM) Chapter 51, TASK 51-80-00-02-01. Make sure you measure from the conductive threads on the check valve outlet fitting to the aircraft structure (some of the conductive threads are still accessible following installation of the check valve). For the structures test point, utilize one of the dome anchor nut outer shells used to retain the access cover on the upper wing skin. The resistance reading shall be less the 15 milliohms. (3) Do pressure test of the motive flow lines as instructed in PSM 1-84-2, AMM Chapter 28, TASK 28-11-06-780-801. C. Close Out (1) Install left and/or right wing panels that follow to the applicable instructions in PSM 1-84-2, AMM Chapter 57, TASK 57-11-01-400-801: ACCESS DESIGNATION 523FT Left Wing Center Panel 623AT Right Wing Center Panel (2) Remove all tools and equipment from the work area. (3) Do Operational test of the fuel system as applicable instructions in PSM 1-84-2, AMM Chapter 28, TASK 28-00-00-710-801. (4) On completion of this service bulletin, make the tollowing entry in the appropriate logbooks: "Service Bulletin 84-28-08, Fuel - Motive Flow Check Valve Bonding - Inspection and Rectification - ModSum 4-110020 accomplished." 11 Mar 2010 S.B. 84-28-08 Page 7 of 10 RL ### Page 8 (OCR) SERVICE BULLETIN 84-28-08 Customer Support Inc. SERVICE BULLETIN FUEL MOTIVE FLOW CHECK VALVE CHEM-FILM ON OUTLET OF MOTIVE FLOW CHECK VALVE PLANNING INFORMATION A. Effectivity This service bulletin is applicable to the Parker Motive Flow Check Valve, P/N 2960018-101. This service bulletin applies to components with the following affected serial numbers: S/N 0001 - 0409, and S/N 3002 - 3031 B. Concurrent Requirements Not applicable. C. Reason This SB is to inform operators of a change in the Motive Flow Check Valve (P/N 2960018-101) to improve electrical bonding on the installation of the motive flow check valve. D. Description Previously, the motive flow check was manufactured with the outlet anodized. See Figure 1. Bombardier has requested that the outlet be chem-filmed for improved electrical bonding. See Figure 2. Figure 1 Figure 2 Red Anodized Check Valve Outlet Chem-Filmed Check Valve Outlet For Improved Electrical Bonding Initial Issue Jan 7/2010 2960018-28-001 Page 1 of 3 THIS DOCUMENT CONTAINS NFORMATION THAT S CONFDENTIAL AND PROPRIETARY TO PARKER HANNIFIN CORPORATION, THIS DOCUNENT IS FURN SHED ON THE UNDERSTANDING THAT THE DOCUMENT AND THE NFORVATION IT CONTANS WILL NOT BE COP ED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF PARKER, WIL NOT BE USED FOR ANY PURPOSE OTHER THAN CONC LUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED UPON REQUEST BY PARKER COPYRIGHT PARKER, YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT, ALL RIGHTS RESERVED. 11 Mar 2010 S.B. 84-28-08 Page 8 of 10 RL ### Page 9 (OCR) SERVICE BULLETIN 84-28-08 Park Customer Support Inc. SERVICE BULLETIN E. Compliance It is recommended that this modification be accomplished at the earliest practical maintenance period. F. Approval This service bulletin contains no modification information that revises the approved configuration and therefore does not require governmental or other regulatory agency approval. The content of this Service Bulletin has been reviewed and accepted by Bombardier Aerospace. G. Manpower None. H. Weight and Balance None. Electrical Load Data Not affected. J. Software Accomplishment Summary Not applicable. K. References None. L. Other Publications Affected Not applicable. M. Interchangeability or Intermixability of Parts Not applicable. Initial Issue Jan 7/2010 2960018-28-001 Page 2 of 3 THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUEL JPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED 11 Mar 2010 S.B. 84-28-08 Page 9 of 10 RL ### Page 10 (OCR) SERVICE BULLETIN 84-28-08 Park Customer Support Inc. SERVICE BULLETIN 2. MATERIAL INFORMATION Material Price and Availability Parker Motive Flow Check Valve, P/N 2960018-101, is available to operators at a cost of $130.33, with a delivery lime of 15 days from receipt of purchase order. Replacement of check valves will be allocaled per Bombardier Direction for 30 months beginning 02/01/2010. Operalors are required to scrap red anodized check valves at their facility and send a priced spares order for replacement directly to Parker at the address listed below: PARKER HANNIFIN CORPORATION PHONE: (949) 833-3000 Customer Support Inc. FAX: (949) 809-8390 14300 Alton Parkway REPAIR STATION NO.: AU4R063M Irvine, California 92618 USA B. Industry Support Information Operators are requested to contact their respeclive Parker Hannifin Customer Service Administrator to schedule implementation of this service bulletin. The prices and provisions contained in this service bulletin are valid for 18 months after release of Bombardier Service Bulletin related to this part exchange. After that date, request a quotation from Parker Hannifin Corporation, Customer Support. C. Material Necessary for Each Component None. D. Material Necessary for Each Spare Not applicable. E. Re-identified Parts None. F. Tooling - Price and Availability None 3. ACCOMPLISHMENT INSTRUCTIONS Not applicable. 4. APPENDIX Not applicable. Initial Issue Jan 7/2010 2960018-28-001 Page 3 of 3 THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF ARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUE JPON REQUEST BY PARKER, COPYRIGHT PARKER, YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVEI 11 Mar 2010 S.B. 84-28-08 Page 10 of 10 RL ### Page 11 (OCR) BOMBARDIER SERVICE BULLETIN (SB) - RECORD OF INCORPORATION - Q SERIES DASH 8 AIRCRAFT To: Partner Data Co-Ordinator (Toronto), Bombardier Aerospace Commercial Aircraft Phone: (1) 416 375 3534 Facsimile: (1) 416 375 4538 E-mail: cmdb.requests@aero.bombardier.com From: Company: Phone: Extn: Facsimile: Date: E-mail: The data that you provide below will help us record the incorporation of this ModSum and the aircraft effectivity in the maintenance manual. Operator: Service Bulletin: Revision: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircratt Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircratt Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Aircraft Serial Number: Model Number: Date Bulletin Completed: Fax this sheet to (1) 416 375 4538 or Email PDF to: cmdb.requests@aero.bombardier.com Jan 2009 ### Page 12 (OCR) BOMBARDIER SERVICE BULLETIN (SB) - COMMENT SHEET - Q SERIES DASH 8 AIRCRAFT To: SB Focal (Toronto), Bombardier Aerospace Commercial Aircraft Phone: (1) 416 375 4078 Facsimile: (1) 416 375 4538 E- mail: syed.rizvi@aero.bombardier.com From: Company: Phone: Extn: Facsimile: Date: E- mail: Select appropriate boxes) and add comments or suggestions you would like us to know that may enhance the quality of our service bulletins. Service Bulletin: _ Revision: ModSum: 1. PLANNING INFORMATION • Effectivity • Reason • Description • Compliance • Approval • Manpower • Material • Weight and Balance • Electrical Load • Tooling • References • Publications Affected 2. MATERIAL INFORMATION • Kit Content • Special Tools/Equipment • Parts to Modify Spares • Consumables • Disposition of Existing Parts • Other 3. ACCOMPLISHMENT INSTRUCTIONS • Job Set-Up • Procedure • Close- Out • Test • Illustration (s) • Other 4. COMMENTS, REMARKS, SUGGESTIONS Fax this sheet to (1) 416 375 4538 or Email PDF to: syed.rizvi@aero.bombardier.com Feb 2009 --- 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.