D

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SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 3200 NUMBER: 8 ---32 ---156

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Landing Gear --- Nose Landing Gear --- Replacement of Pushrod

Assembly to Substitute T4 with a T6 --- ModSum 8Q101335

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

In ---Service: DHC ---8 Aircraft Models 201, 202, 301, 311, 314 and 315

Serial Numbers 552 thru 588.

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 Remarks

83232012 ---001 Pushrod --- Nose

Landing Gear

Manufactured after

September 2000
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B. Reason

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 pushrod is removed, destroyed and discarded

--- a new pushrod is installed. A functional test of the nose landing gear doors 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 2 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 2.00

Test / RTS 0.00

Close ---Out 0.00
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G. Material --- Price and Availability

ModKit 8MK4279 ---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

8MK4279 ---001 Retrofit Kit ---Pushrod Replacement,

Nose Landing Gear

H. Weight and Balance

None

I. Electrical Load Data

Not affected

J. Publications Affected

Dash 8 Illustrated Parts Catalogue PSM 1 ---82 ---4 and ....................

PSM 1 ---83 ---4

Modifications Manual PSM 1 ---813 ---12 ...............................
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K. References

The initial issue of this service bulletin was prepared to the engineering drawings

and related data that follows:

DRAWING SHEET REV

8MK4279 1 A

ModSum 8Q101335 Rev. ‘B’

PCA 4522 Revision --- --- (for internal reference only)

2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

(1) Modification Kit 8MK4279 ---001

(2) Detailed Kit Content:

Quantity Per Kit

---001

Part Number Description Remarks

1 8MK4279 Kit Drawing

2 MS24665 ---153 Cotter Pin

4 AN960 ---516 Washer

1 83232012 ---951 Pushrod ---NLG

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

83232012 ---001 Pushrod 1 B DIS 83232012 ---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 ---82 ---2 or PSM 1 ---83 ---2.

(2) Lock the nose landing gear doors. Refer to Maintenance Manual Chapter PSM

1 ---82 ---2 TASK 32 ---00 ---00 ---840 ---801 or PSM 1 ---83 ---2 Chapter 32 ---20 ---21.
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WARNING: MAKE SURE THAT THE LOCKPINS ARE INSTALLED IN THE MAIN

LANDING GEAR. MAKE SURE THE NOSE GEAR LOCK IS ENGAGED.

IF THIS IS NOT DONE, THE LANDING GEAR CAN ACCIDENTALLY

RETRACT. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE

TO THE EQUIPMENT.

WARNING: BE SURE THAT THE HYDRAULIC PRESSURE IS OFF, AND THAT

THERE IS NO PRESSURE IN THE HYDRAULIC SYSTEM. IF YOU DO

NOT DO THIS YOU CAN CAUSE INJURIES TO PERSONS AND

DAMAGE TO THE EQUIPMENT.

B. Procedure

(1) Remove and discard pushrod 83232012 ---001 from the nose landing gear

forward door as follows: (Refer to Maintenance Manual PSM 1 ---82 ---2 TASK

32 ---22 ---11 ---030 ---801 or PSM 1 ---83 ---2 Chapter 32 ---20 ---21 for access location

and to drawing 8MK4279)

(a) Disconnect one end of the pushrod from the bellcrank by removing one

cotter pin MS24665 ---153, one nut MS14145L5, two washers AN960 ---516,

one bolt NAS1105 ---12D and one bushing NAS75 ---5 ---006. Keep all

hardware except for washers and cotter pin.

(b) Disconnect the other end of the pushrod from the door attachment bracket

by removing one cotter pin MS24665 ---153, one nut MS14145L5, two

washers AN960 ---516 and one bolt NAS1105 ---20D. Keep all hardware

except for washers and cotter pin.

(2) After removing each defective Pushrod (P/N 83232012 ---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.

(3) Install and rig new pushrod 83232012 ---951 to the nose landing gear forward

door as follows: (Refer to Maintenance Manual PSM 1 ---82 ---2 TASK

32 ---22 ---11 ---830 ---801 or PSM 1 ---83 ---2 Chapter 32 ---20 ---21 for rigging

instructions and to drawing 8MK4279)

(a) Connect one end of the pushrod to the door attachment bracket using one

nut MS14145L5, two new washers AN960 ---516 and one bolt

NAS1105 ---20D. Torque nut 40 to 80 inch pounds and lock with new cotter

pin MS24665 ---153.
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(b) Connect the other end of the pushrod to the bellcrank by using one nut

MS14145L5, two new washers AN960 ---516, one bolt NAS1105 ---12D and

one bushing NAS75 ---5 ---006. Torque nut 50 to 70 inch pounds and lock

with 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 Nose Landing Gear Doors per Maintenance

Manual PSM 1 ---82 ---2 TASK 32 ---30 ---00 ---720 ---801 or PSM 1 ---83 ---2 Chapter

32 ---20 ---21.

(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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This Page Intentionally Blank

1
Jan 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.com
Feb 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 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 Email PDF to:

syed.rizvi@aero.bombardier.com