# D

S.B. 8 ---27 ---99 Page 1 of 8 10 Oct 2008 JR 

# SERVICE BULLETIN Customer Support
ATA SYSTEM: 2700 NUMBER: 8 ---27 ---99 

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

SUBJECT: Flight Controls --- Rudder Control --- Replacement of Pushrod Assembly to Substitute T4 with a T6 --- ModSum 8Q101333

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 413, 443, 450 thru 452, 456, 458, 462 thru 465, 467 thru 470 and 473 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 ---99

S.B. 8 ---27 ---99 Page 2 of 8 10 Oct 2008 JR Part Number Description Remarks 82710028 ---003 Pushrod --- Rudder Pedal Manufactured after February 1997 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: --- the affected pushrods are removed, destroyed and discarded --- new pushrods are installed --- a functional test of the rudder control system is performed D. Compliance Bombardier Aerospace highly recommends that this modification be incorporated at the operators earliest opportunity, unless otherwise directed by their Airworthiness Authority. 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: TASK MAN ---HOURS Job Set ---Up 0.00 Procedure 7.00 Test / RTS 1.00 Close ---Out 0.00

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 3 of 8 10 Oct 2008 JR G. Material --- Price and Availability ModKit 8MK4278 ---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 8MK4278 ---001 Retrofit Kit ---Control Rod Assembly 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

.................... PSM 1 ---82 ---4 and PSM 1 ---83 ---4 Modifications Manual PSM 1 ---813 ---12

...............................

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 4 of 8 10 Oct 2008 JR L. References The initial issue of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8MK4278 1
--- --- ModSum 8Q101333 Rev. ‘B’ PCA 4522 Revision --- --- (for internal reference only) 2. MATERIAL INFORMA TION A. Parts Required Per Aircraft (1) Modification Kit 8MK4278 ---001 (2) Detailed Kit Content:

Quantity Per Kit ---001 Part Number Description Remarks

8 MS24665 ---153 Cotter Pin 4 AN960D416L Washer 4 AN960D416 Washer 4 82710028 ---951 Pushrod ---Rudder B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 5 of 8 10 Oct 2008 JR 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 82710028 ---003 Pushrod 4 B DIS 82710028 ---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. 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) Remove and discard four pushrods 82710028 ---003 from the rudder pedal adjustment assembly on the pilots and co ---pilots side as follows:

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 6 of 8 10 Oct 2008 JR NOTE: Replace one pushrod at a time.

(a) From the pedal adjustment lever disconnect one side of the pushrod by removing one cotter pin MS24665 ---153, one nut MS14144L4, one bolt NAS1304 ---14D, one washer AN960D416 and one bushing NAS75 ---04 ---006 per Maintenance Manual PSM 1 ---8 ---2 or 1 ---82 ---2 or 1 ---83 ---2 Chapter 27 ---20 ---00. Keep all hardware except for washer and cotter pin (refer to Figure 2). (b) From the rudder pedal tube assembly disconnect the other side of the pushrod by removing one cotter pin MS24665 ---153, one nut MS14144L4, one bolt MS1304 ---18D, one washer AN960D416L and one bushing NAS75 ---4 ---008. Keep all hardware except for washer and cotter pin (refer to Figure 2). (2) After removing each defective Pushrod (P/N 82710028 ---003) 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. (3) Install and rig four new pushrods 82710028 ---951 to rudder pedal adjustment assembly on the pilots and co ---pilots side as follows: (a) Install one end of pushrod to pedal adjustment lever using kept hardware, one new washer AN960D416 and one new cotter pin MS24665 ---153 per Maintenance Manual PSM 1 ---8 ---2 or 1 ---82 ---2 or 1 ---83 ---2 Chapter 27 ---20 ---00 (refer to Figure 2). (b) Install the other end of pushrod to rudder pedal tube assembly using kept hardware, one new washer AN960D416L and one new cotter pin MS24665 ---153. C. Close Out (1) Remove all tools and equipment from the work area. (2) Perform a functional test of the Rudder Control System per Maintenance Manual PSM 1 ---8 ---2 or 1 ---82 ---2 or 1 ---83 ---2 Chapter 27 ---20 ---00. (3) 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.

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 7 of 8 10 Oct 2008 JR Figure 1

### SERVICE BULLETIN 8 ---27 ---99

S.B. 8 ---27 ---99 Page 8 of 8 10 Oct 2008 JR View Looking Inboard on LH Side (RH Side Similar) Figure 2 COTTER PIN MS24665 ---153 4 REQUIRED WASHER AN960D416L 4 REQUIRED (BOLT MS1304 ---18D) (BUSHING NAS75 ---4 ---008) (NUT MS14144L4)

COTTER PIN MS24665 ---153 4 REQUIRED WASHER AN960D416 4 REQUIRED (BOLT MS1304 ---14D) (BUSHING NAS75 ---4 ---006) (NUT MS14144L4)

PUSHROD ---RUDDER 82710028 ---951 4 REQUIRED

1Nov 2006 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.comE --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.comNov 2006 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 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 V Compliance VApproval V Manpower V Material VWeight and Balance V Electrical Load VTooling V References V Publications Affected 2. MATERIAL INFORMATION V Kit Content V Special Tools/Equipment V Parts to Modify Spares V Consumables V Disposition of Existing Parts V Other
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 PDF to: bob.barriault@aero.bombardier.com