D

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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 INFORMATION

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.
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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
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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 ...............................
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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 INFORMATION

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
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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. ACCOMPLISHMENT INSTRUCTIONS

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:
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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.
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Figure 1
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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

1
Nov 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.com
Nov 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

V Approval V Manpower V Material V Weight and Balance

V Electrical Load V Tooling 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

V Job Set ---Up V Procedure V Close---Out V Test

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