# D

S.B. 8 ---27 ---100 Page 1 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 

# SERVICE BULLETIN Customer Support
ATA SYSTEM: 2700 NUMBER: 8 ---27 ---100 

### BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Flight Controls --- Brake, Rudder Control --- Replacement of Pushrod Assembly to Substitute T4 with a T6 --- ModSum 8Q101334

1. PLANNING INFORMA TION A. Effectivity Aircraft Affected: In ---Service: DHC ---8 Aircraft Models 102, 103, 106, 201, 202, 301, 311, 314 and 315 Serial Numbers 464, 508, 511 thru 513, 515 thru 588. 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: 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.

### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 2 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 Part Number Description Remarks 82710274 ---001 Pushrod --- Brake, Rudder Pedal Manufactured after April 1998 B. Reason Problem: Some pushrods may have been incorrectly manufactured with tubes having the wrong heat treat condition using 6061 ---T4 instead of 6061 ---T6. C. Description The procedures in this service bulletin give the instructions to do the tasks that follow: --- pushrods p/n 82710274 ---001 are removed and discarded --- replacement pushrods p/n 82710274 ---951 are installed --- removed pushrods are destroyed and discarded --- the system is rigged --- a functional test of the brake, rudder control system is performed --- close ---out D. Compliance Bombardier Aerospace highly recommends that this modification be incorporated at the operators earliest opportunity, unless otherwise directed by their Airworthiness Authority. A Transport Canada Airworthiness Directive 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. F. Manpower It will take an estimated 8 man ---hours to complete this service bulletin. The breakdown of the man ---hours is shown in the table that follows:

### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 3 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 TASK MAN ---HOURS Job Set ---Up 0.00 Procedure 7.00 Test / RTS 1.00 Close ---Out 0.00 G. Material --- Price and Availability ModKit 8MK4282 ---001 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 Price (US$) Delivery 8MK4282 ---001 Retrofit Kit ---Brake Rod Assembly --- Brake Rudder Quoted at time of order Will be given at time of order

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 and

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### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 4 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 PSM 1 ---82 ---4 and PSM 1 ---83 ---4 Modifications Manual PSM 1 ---813 ---12

............................... L. References Revision ‘A’ of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8MK4282 1
--- --- Mod 8Q101334 Rev. ‘B’ PCA 4522 Revision --- --- (for internal reference only) 2. MATERIAL INFORMA TION A. Parts Required Per Aircraft (1) Modification Kit 8MK4282 ---001 (2) Detailed Kit Content:

Quantity Per Kit ---001 Part Number Description Remarks

4 MS24665 ---88 Cotter Pin 4 AN960D10L Washer 2 82710274 ---951 Pushrod ---Brake B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None

### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 5 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 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 Part Number Description Qty. IC DC New Part Number PNC 82710274 ---001 Pushrod 2 B DIS 82710274 ---951 S 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. 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. S Superseding or equivalent part number. X Reworked part and superseding part are functionally and physically equivalent but not identical.

### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 6 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 3. ACCOMPLISHMENTINSTRUCTIONS A. Job Set ---Up (1) Either pull and clip circuit breakers required to isolate affected circuits or placard and select aircraft electrical power to OFF. Obey all relevant WARNINGS and CAUTIONS detailed in Maintenance Manual PSM 1 ---8 ---2 or PSM 1 ---82 ---2 or PSM 1 ---83 ---2. B. Procedure (1) Gain access to the brake, rudder control pushrods below the flight compartment floor on the pilots and co ---pilots side by removing access panels 121AL and 121BL per Maintenance Manual PSM 1 ---8 ---2 or PSM 1 ---82 ---2 or PSM 1 ---83 ---2 Chapter 6 ---40 ---10. (2) Deleted (3) Replace two pushrods 82710274 ---001 from the brake, rudder control assembly on the pilot’s side as follows: (a) Disconnect both ends of the pushrod by removing two cotter pins MS24665 ---88, two nuts MS14144L3, two washers AN960D10L and two bolts NAS6603D7. Keep all hardware except for washers and cotter pins (refer to Figure 3). (b) After removing each defective Pushrod (P/N 82710274 ---001) cut each part into two pieces in a way that will render them UNSERVICEABLE, wire lock the two pieces together. Tag the parts and dispose them as instructed by your Local Airworthiness Authority. (c) Install new pushrods 82710274 ---951 using kept hardware, new washers AN960D10L and new cotter pins MS24665 ---88 (refer to Figure 3). (4) Rig the rudder control system per Maintenance Manual PSM 1 ---8 ---2 or PSM 1 ---82 ---2 or PSM 1 ---83 ---2 Chapter 27 ---20 ---00. C. Close Out (1) Remove all tools and equipment from the work area. (2) Perform a functional test of the Brake System per Maintenance Manual PSM 1 ---8 ---2 or 1 ---82 ---2 or 1 ---83 ---2 Chapter 32 ---42 ---00. (3) Install access panels 121AL and 121BL per Maintenance Manual PSM 1 ---8 ---2 or PSM 1 ---82 ---2 or PSM 1 ---83 ---2 Chapter 6 ---40 ---10.

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S.B. 8 ---27 ---100 Page 7 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 (4) On incorporation of this ModSum, make an entry that conforms to local regulatory requirements in the applicable logbook(s). Enter component serial numbers if applicable. Enter this ModSum number only after complete and functional incorporation of all work defined in this service bulletin.

Figure 1 VIEW DELETED

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S.B. 8 ---27 ---100 Page 8 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 Figure 2

### SERVICE BULLETIN 8 ---27 ---100

S.B. 8 ---27 ---100 Page 9 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 View Looking Inboard on LH Side Figure 3 COTTER PIN MS24665 ---88 4 REQUIRED WASHER AN960D10L 4 REQUIRED (BOLT NAS6603D7) (NUT MS14144L3

PUSHROD 82710274 ---951 2 REQUIRED

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S.B. 8 ---27 ---100 Page 10 of 10 10 Oct 2008 LS Revision ’A’, 22 Mar 2011 

### This Page Intentionally Blank 1Jan 2009 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: 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 Email PDF to: 

# cmdb.requests@aero.bombardier.comFeb 2009 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 box(es) 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 V Effectivity V Reason V Description VCompliance VApproval V Manpower V Material VWeight and Balance V Electrical Load VTooling V References V Publications Affected 2. MATERIAL INFORMATION V Kit Content VSpecial Tools/Equipment V Parts to Modify Spares V Consumables V Disposition of Existing Parts VOther
3. ACCOMPLISHMENT INSTRUCTIONS VJob Set ---Up V Procedure V Close---Out VTest V Illustration(s) V Other 4. COMMENTS, REMARKS, SUGGESTIONS



## Fax this sheet to (1) 416 375 4538 or Email PDF to: syed.rizvi@aero.bombardier.com