# Bombardier Service Bulletin 8-52-61 Copy: No revision named ("U.S. DOT/FAA - Service Bulletin"), 12 pages: PDF https://openairdocs.org/files/sha256/9e/e8/9ee841d8fb552185dcde9ce379729d0fb79778003d43bc299a0ca8e360458188; text https://openairdocs.org/service-documents/bombardier/sb-8-52-61/file/9ee841d8fb55.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2011-0479; AD 2011-21-04 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: 8-52-61 - Page: https://openairdocs.org/service-documents/bombardier/sb-8-52-61 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2011-21-04](https://openairdocs.org/ad/2011-21-04.md), effective Nov 16, 2011: No revision named ## Text (12 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2011-0479; AD 2011-21-04 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: 5251 NUMBER: 8-52-61 BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS SUBJECT: Doors - Cockpit Door - Latch Block Replacement and Rework of Strike Plate - ModSum 8Q902145 1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 102, 103, 106, 201, 202, 301, 311, 314 and 315 Serial Numbers 452, 464, 490, 506, 508 thru 557 with Pre-Requisite ModSum 8Q900267 / Service Bulletin 8-52-58 incorporated. Production: ModSum 8Q902145 is not applicable to production aircraft. 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. 20 Oct 2006 S.B. 8-52-61 Page 1 of 10 ### Page 2 (OCR) SERVICE BULLETIN 8-52-61 Spares Affected: None B. Reason Problem: An operator has reported an inability to perform the door emergency removal test after incorporation of ModSum 8Q900267 (Service Bulletin 8-52-58). Cause: Completion of the door emergency removal test was prevented by fouling of the door latch on the strike plate and latch block. Solution: This ModSum / Service Bulletin provides a new latch block and elongation of the slot in the striker plate. C. Description The procedures in this service bulletin give the instructions to do the tasks that follow: - The flight compartment door is removed - The strike plate and latch block are removed from the door right hand post - A new latch block is bonded to the door right hand post with a kept retaining plate and screws - The slot in the strike plate is elongated and the plate is re-installed with existing fasteners - The flight compartment door is installed and tested - Log entries are made D. Compliance Bombardier Inc. highly recommend that ModSum 8Q900267 be incorporated at the earliest opportunity unless otherwise directed by the operator's airworthiness authority. NOTE: Operators of aircraft under the authority of Transport Canada should refer to Airworthiness Directive CF -2005-341 (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. 20 Oct 2006 S.B. 8-52-61 Page 2 of 10 ........ ### Page 3 (OCR) SERVICE BULLETIN 8-52-61 F. Manpower It will take an estimated 3.00 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 0.00 Procedure 3.00 Test / RTS 0.00 Close- Out 0.00 All costs to incorporate this modification are the responsibility of the Operator G. Material - Price and Availability Latch Block 8Z1590-065 is 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. Downsview Ontario Canada M3K - 1Y5 Facsimile: (416) 375-3060 Telephone: (416) 375-3920 Part Number Description Price (US$) Delivery 8Z1590-065 Latch Block Assy Quoted at Will be given time of order at time of order H. Tooling - Price and Availability None 20 Oct 2006 S.B. 8-52-61 Page 3 of 10 ..... ### Page 4 (OCR) SERVICE BULLETIN 8-52-61 I. Weight and Balance None J. Electrical Load Data Not affected K. Publications Affected Dash 8 Illustrated Parts Catalogue .. PSM 1-8-4 and PSM 1-82-4 and PSM 1-83-4 Modifications Manual ....... . PSM 1-813-12 L. References The initial issue of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8MK4092 1 8Z6337 1 —B ModSum 8Q902145 Rev-A ModSum 8Q900267 Rev-C. (Service Bulletin 8-52-58 Rev 'A') Transport Canada Airworthiness Directive CF-2005-34R1 (pending) MATERIAL INFORMATION A. Parts Required per Aircraft Part Number Qty per Description Remarks Aircraft 8Z1590-065 1 Latch Block Assy In motion to the save pati he folay be manufact are by the operator, procured as single items from Bombardier Aerospace Regional Aircraft or purchased directly from industry sources. Addresses of manufacturers and suppliers not shown below are listed in either Maintenance Manual Chapter 20 or in Structural Repair Manual Chapter 51. 20 Oct 2006 S.B. 8-52-61 Page 4 of 10 ### Page 5 (OCR) SERVICE BULLETIN 8-52-61 Part Number Qty per Description Remarks Aircraft EC 1357N 3 oz. Adhesive DHMS A6.II Type II Class I RTV 102 or 732 3 oz. Sealant DSC 233-2 (white silicone) 9185(414.12) 1 oz. Primer (base) ....402 1 oz. Hardener ....62 1 oz. Thinner Mankiewicz Gerber & Co. DA 2.8 (404.12) 1 oz. Paint (Grey Cloud) ....400 1 oz. Hardener ....62 Thinner Primer 9185 (414.12) and paint DA 2.8 (404.12) is available from: Mankiewicz Gerber & Co. Georg-Wilhelm Strasse 189, D21107 Hamburg, Germany Telephone: +49 (0) 40 75 10 30 Facsimile: +49 (0) 40 75 10 34 15 E-mail info@mankiewicz.de NOTE: This service bulletin is self-contained (illustrated). No drawings will be supplied. B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None 20 Oct 2006 S.B. 8-52-61 Page 5 of 10 ### Page 6 (OCR) SERVICE BULLETIN 8-52-61 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 5411 Latch Block A DIS 8Z1590-065 S 9701109-1 Strike plate 1 A RWK 8Z6337 - 101 S IC 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. 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. Superseding or equivalent part number. Reworked part and superseding part are functionally and physically equivalent but not identical. 20 Oct 2006 S.B. 8-52-61 Page 6 of 10 ....... ### Page 7 (OCR) SERVICE BULLETIN 8-52-61 3. ACCOMPLISHMENT INSTRUCTIONS A. Procedure (1) In aircraft with ModSum 8Q900267 (Service Bulletin 8-52-58) already incorporated, open the flight compartment door. (2) Remove strike plate 9701109-1 from the right hand door post and keep with fasteners. (3) Elongate the slot in the strike plate as shown in Figure 1. Touch up bared metal. Re-identify the strike plate as 826337-101. (4) Carefully remove existing latch block (bonded and on pins) from the right hand door post. Do not damage the surrounding decorative finish. Keep the plate and fasteners and discard the latch block. Clean door post and bond new latch block 8Z1590-065 to existing location (pins) with adhesive EC 1357N or equivalent (refer to Maintenance Manual (AMM) Chapter 20-25-55 or Task 20-25-55-390-801). (6) Paint bared spot on door edge. Use equivalent to primer 9185 (base 414.12 with hardener 402 and thinner 62). Finish with Grey Cloud DA 2.8 (base 404.12 with hardener 400 and thinner 62). Apply a fillet of sealant RTV 102 or RTV 732 or equivalent around all edges of the latch block (refer to AMM Chapter 20-25-50 or Task 20-25-50-300-801). (8) Install reworked strike plate 8Z6337-101 with kept screws NAS514P1032-8. (9) Do the following Door Removal Function Test: (a) With the door in its closed and latched position, pull the upper two hinge pins down and place the red pegs in their detentes. (b) Push the door aft until the hinges are clear of the door and allow the door to drop off the bottom hinge. This may be assisted by pushing down on the red strap located about the mid-point of the door. (c) Rotate the door to starboard, releasing it from the latch, taking care not to damage the surrounding decor panels. (d) Re-install flight compartment door. 20 Oct 2006 S.B. 8-52-61 Page 7 of 10 ........ ### Page 8 (OCR) SERVICE BULLETIN 8-52-61 A Z175.00 AVIONICS BAY 31.74 in. (Original Dimension) 32.19 in. (New Dimension) ORIGINAL BLOCK TOUCH-UP PROFILE STRIKE PLATE AS REQ'D 3.00 in. 2.50 in. (Ref) 1.50 in. (Ref) 0.03 in. Rad ALL AROUND ELONGATE LATCH SLOT AS REQ'D STRIKE PLATE 8Z6337-101 dsb8_5251_001.dg, rt, may08/2006 A - A LATCH BLOCK ASSY 8Z1590-065 Latch Rework Figure 1 20 Oct 2006 S.B. 8-52-61 Page 8 of 10 ### Page 9 (OCR) SERVICE BULLETIN 8-52-61 B. _ Close Out (1) Remove all tools and equipment from the work area. (2) 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. 20 Oct 2006 S.B. 8-52-61 Page 9 of 10 ### Page 10 (OCR) SERVICE BULLETIN 8-52-61 This Page Intentionally Blank 20 Oct 2006 S.B. 8-52-61 Page 10 of 10 ### Page 11 (OCR) BOMBARDIER SERVICE BULLETIN (SB) - RECORD OF INCORPORATION - Q SERIES DASH 8 AIRCRAFT To: Partner Data Co-Ordinator (Toronto) From: Bombardier Aerospace Regional Aircraft Company: Phone: (1) 416 375 3534 Phone: Extn: Facsimile: (1) 416 375 4538 Facsimile: Date: E-mail: partner.data.ra.techpubs@aero.bombardier.com 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: 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: 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: Fax this sheet to (1) 416 375 4538 or PDF to: partner.data.ra.techpubs@aero.bombardier.com Nov 2006 ### Page 12 (OCR) BOMBARDIER SERVICE BULLETIN (SB) COMMENT SHEET - Q SERIES DASH 8 AIRCRAFT To: SB Focal (Toronto) "Bob Barriault" From: Bombardier Aerospace Regional Aircraft Company: Phone: (1) 416 375 4078 Phone: Extn: Facsimile: (1) 416 375 4538 Facsimile: Date: E-mail: bob.barriault@aero.bombardier.com 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 PDF to: bob.barriault@aero.bombardier.com Nov 2006 --- 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.