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SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 2812 NUMBER: 84-28-13

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Fuel System - Center Wing - Removal of Clamps Between Engine

Feed and Scavenge System Lines on RHS - ModSum 4-113745

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4332 thru

4417.

NOTE: Serial Numbers 4001 thru 4331 are covered by Bombardier Service

Bulletin 84-28-09 (ModSum 4-113643).

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:

None
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B. Reason

Problem: The existing clamp installation in the right hand side center wing fuel tank

(between the engine fuel feed line and the scavenge system line) is now

redundant after the engine fuel feed line revision that increased the space

between the two lines.

Solution: Remove and discard the existing clamp installation located between the

engine fuel feed line and the scavenge system line.

C. Description

The procedures in this service bulletin give the instructions to do the tasks that

follow:

- aircraft is put into standard configuration for maintenance

- the nose landing gear lock is engaged

- the main landing gear lock pins are installed thru each main gear and main gear

door mechanism

- the fuel tanks are drained, aircraft electrical power is removed and the engines are

supported

- access is gained to fuel tank access panel 622CT-right hand side

- access panel 622CT is removed, residual fuel is mopped up and the tank is vented

- the affected clamps and hardware are removed and discarded

- access panel 622CT-right hand side is installed

- close out.

D. Compliance

Bombardier Inc. highly recommend that ModSum 4-113745 be incorporated at the

earliest opportunity unless otherwise directed by the operator’s airworthiness

authority.

A Transport Canada Airworthiness Directive 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.
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This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage

Tolerance Inspections (DTIs).

F. Manpower

It will take an estimated 2.50 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 *1.00

Procedure 0.50

Test / RTS not applicable

Close-Out 1.00

* time required to defuel and vent fuel tank not included

For any on-site labor assistance, please speak with a Fleet Services representative

for a quote. The Fleet Services group can be contacted via the Q Series Technical

Help Desk by telephone at 416-375-4000 or email at:

thd.qseries@aero.bombardier.com

G. Material - Price and Availability

The part(s) and material(s) detailed in Paragraph(s) 2.A. may be purchased as

single items from Bombardier Aerospace Regional Aircraft. DK parts are to be

manufactured and approved locally (refer to disclaimer in the related text or

illustration). In some cases, an equivalent to the DK part may be available from

Bombardier under the production part number shown as reference in Parts

Required Per Aircraft.

H. Tooling - Price and Availability

None

I. Weight and Balance

None

J. Electrical Load Data

Not affected
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K. Publications Affected

Dash 8 Illustrated Parts Catalogue PSM 1-84-4 ....................

ModSums Manual PSM 1-84-12 ..................................

L. References

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

and related data that follows:

DRAWING SHEET REV

8DK4195 1 -

ModSum 4Q113745 Rev. ‘B’

ModSum 4-113745 Rev. ‘B’

Bombardier Service Bulletin 84-28-09 Rev. ‘C’ (ModSum 4-113643)

Bombardier Service Bulletin 84-28-14 (ModSum 4-113754)

Bombardier Service Bulletin 84-28-15 (ModSum 4-113762)

PCA 44006 Revision 0 (for internal reference only)

Transport Canada Airworthiness Directive Pending.

2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

(1) Drawing Kit 8DK4195-001, Rework - Fuel System Installation, Center Wing

(2) Detailed Kit Content:

Quantity Per Kit

-001

Part Number Description Remarks

1 -001 Rework drawing
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B. Parts Required to Modify Spares

None

C. Special Tools and Equipment Required

None

D. Existing Parts Accountability

None

3. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set-Up

WARNING: MAKE SURE YOU INSTALL THE LOCKPINS ON THE MAIN LANDING

GEAR. MAKE SURE YOU ENGAGE THE NOSE GEAR LOCK. IF YOU

DO NOT DO THIS, THE LANDING GEAR CAN ACCIDENTALLY

RETRACT. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE

TO THE EQUIPMENT.

WARNING: MAKE SURE YOU INSTALL THE LOCKPINS ON THE LANDING GEAR

DOORS. MAKE SURE YOU DISCONNECT THE LANDING GEAR

DOORS. IF YOU DO NOT DO THIS THE LANDING GEAR DOORS WILL

CLOSE WHEN YOU APPLY THE HYDRAULIC PRESSURE. THIS CAN

CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.

WARNING: OBEY ALL THE FUEL SAFETY PRECAUTIONS WHEN YOU DO WORK

ON THE FUEL SYSTEM AND/OR A FUEL SYSTEM COMPONENT. IF

YOU DO NOT YOU CAN CAUSE INJURIES TO PERSONS AND/OR

DAMAGE TO EQUIPMENT.

(1) Make sure that lock pins are installed through each main gear and main gear

door mechanism.

(2) Make sure the nose gear ground lock is engaged.

WARNING: YOU MUST REMOVE THE FUEL FROM THE FUEL TANK IN AN OPEN

AREA. IF YOU DO NOT DO THIS, YOU CAN CAUSE INJURIES TO

PERSONS AND DAMAGE TO THE EQUIPMENT.
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(3) Refer to AMM TASK 28-10-00-840-801 and prepare fuel tank for access. Make

sure no fuel or fuel vapors are present before working on aircraft or in the fuel

tanks.

(4) Refer to AMM TASK’ 24-00-00-861-802, TASK 24-00-00-910-801 and placard and

select all aircraft electrical power to OFF. Obey all relevant WARNINGS and

CAUTIONS.

(5) Refer to Figure 1 and set up work platforms and/or ladders to permit access to

the fuel tank access panel 622CT right hand side. Make sure that the work

platforms or ladders are electrically grounded.

(6) Refer to AMM TASK 28-00-00-910-801 and make sure to obey the fuel system

safety precautions.

(7) Refer to AMM TASK 24-00-00-910-801 and make sure to obey the

electrical/electronic safety precautions.

(8) Refer to AMM TASK 24-00-00-910-802 and obey the electrostatic discharge

safety precautions.

CAUTION: MAKE SURE THAT THE FUEL TANKS ARE DRAINED BEFORE YOU

REMOVE THE ACCESS PANELS. IF YOU DO NOT DO THIS, YOU CAN

CAUSE DAMAGE TO THE WING STRUCTURE.

CAUTION: MAKE SURE THAT YOU DO NOT MOVE THE AIRCRAFT BEFORE YOU

INSTALL THE FUEL ACCESS PANELS. THIS IS NECESSARY TO

PREVENT DAMAGE TO THE WING AND THE WING BOX STRUCTURE.

(9) Refer to Figure 1 and the applicable instructions in AMM TASK 57-11-01-000-801

and remove right wing access panel 622CT.

(10) Use cotton cloths or a natural sponge to soak up the remaining fuel.

(11) Refer to the applicable instructions in AMM TASK 28-10-00-840-802 and remove

fuel fumes from tank.

CAUTION: KEEP A CONTINUOUS FLOW OF VENTILATING AIR THROUGH A

FUEL TANK WHEN WORK IS BEING DONE INSIDE THE TANK.

B. Procedure

(1) Refer to Figure 2 and locate existing clamp installation between Y136.300 and

Y157.825.
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(2) Remove and discard screw NAS1801-3-16, spacer NAS43DD3-32FC, clamp

MS21919WDF12, clamp MS21919WDF16, washer AN960D10L and self locking

nut MS21042L3.

C. Close Out

(1) Make sure to remove all debris and unwanted material(s) from the fuel tanks.

(2) Refer to AMM TASK 57-11-01-400-801 and install right wing access panel

622CT.

(3) Remove all tools and equipment from the work area.

(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.
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Plan View

Figure 1
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Detail A

Figure 2

REMOVED AND DISCARDED:

SCREW NAS1801-3-16

SPACER NAS43DD3-32FC

CLAMP MS21919WDF12

CLAMP MS21919WDF16

WASHER AN960D10L

NUT, SELF LOCKING

MS21042L3

ENGINE FEED INSTALLATION

82822002

SCAVENGE MOTIVE

FLOW INSTALLATION

82822012
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This Page Intentionally Blank

1
Jan 2009

SERVICE BULLETIN (SB) --- RECORD OF INCORPORATION

--- Q SERIES DASH 8 AIRCRAFT

To: CMDB Focal

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