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SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 3244 NUMBER: 8 ---32 ---172

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Landing Gear --- Parking Brake System --- Recall of Parking Brake

Accumulator --- Special Inspection & Rectification

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

In ---Service: All DHC ---8 Aircraft Models 102, 103, 106, 201, 202, 301, 311,

314 and 315 with parking brake hydraulic accumulator part

numbers (p/n) 0860162002 (Tactair Fluid Controls Inc).

Refer to the “EFFECTIVITY” section in enclosed vendor

service bulletin (VSB) SB0860162002 ---32 ---1 for a list of

affected serial numbers.

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.
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Spares Affected:

Operators should check spares for existence of parking brake hydraulic

accumulators p/n 0860162002 listed in the VSB. Accumulators with suspect

serial numbers are subject to recall / rework.

B. Reason

Problem: Screw caps attached at either end of parking brake hydraulic accumulator

(p/n 0860162002) may develop cracks and/or could fracture when

pressurized. This could result in loss of the No. 2 hydraulic system and

possible damage to adjacent components and/or aircraft structure.

The issue was discovered on a non DHC ---8 aircraft that uses similar

accumulators. There have been no reported incidents on any DHC ---8

aircraft related to the described condition.

Tactair is recalling Hydraulic Accumulators assembled between March

2005 and July 2007 that may have components supplied by York to Tactair

as a part of the acquisition.

Solution: This service bulletin gives the instructions to determine the part number &

serial number of the existing parking brake hydraulic accumulator. If the

part number & serial number is in the range of affected units (see NOTE

below), the operator is instructed to remove the existing “suspect” parking

brake accumulator and install a “new conforming” accumulator.

All removed “suspect” accumulator are returned to the vendor for

exchange.

NOTE: Refer to the “EFFECTIVITY” section in the enclosed TACTAIR VSB

SB0860162002 ---32 ---2 for a list of affected units.

C. Description

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

follow:

--- all aircraft electrical power is selected to OFF

--- lock pins are installed thru each main gear and main gear door mechanism

--- the nose gear ground lock is engaged

--- a warning sign is installed on the external hydraulic connection

--- the hydraulic pressure in the No.2 system is depleted

--- an electrically grounded workstand or ladder is positioned under the right wing to
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fuselage area (under the “wing root”)

--- two access panel are removed

--- the parking brake accumulator is located

--- the part number and serial number of the parking brake accumulator is recorded

and checked against a table in enclosed TACTAIR VSB to determine disposition

--- if required the parking brake accumulator is removed using existing AMM

procedures and returned to the vendor per instructions given in enclosed TACTAIR

VSB SB0860162002 ---32 ---1

--- a new accumulator (non suspect unit) is installed to agree with existing AMM

instructions

--- Close ---Out

D. Compliance

Bombardier Inc. recommends accomplishment of the special inspection and

rectification conveyed by this service bulletin at the earliest opportunity unless

otherwise directed by the operator’s 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 5 man ---hours to complete this service bulletin if

replacement of the parking brake accumulator is required. The breakdown of the

man ---hours is shown in the table that follows:

TASK MAN ---HOURS

Job Set ---Up 1.00

Procedure 2.00

Test / RTS 1.00

Close ---Out 1.00
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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

Refer to the MATERIAL INFORMATION section in enclosed TACTAIR VSB

SB0860162002 ---32 ---1.

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

L. References

The initial issue of this service bulletin was prepared to the related data that

follows:

PCA 05765 Revision 1 (for internal reference only)

Tactair Fluid Controls Inc. SB0860162002 ---32 ---1.
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2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

If replacement of the parking brake accumulator is required, refer to the MATERIAL

INFORMATION section in enclosed TACTAIR VSB SB0860162002 ---32 ---1.

B. Parts Required to Modify Spares

If replacement of a spare parking brake accumulator is required, refer to the

MATERIAL INFORMATION section in enclosed TACTAIR VSB

SB0860162002 ---32 ---1.

C. Special Tools and Equipment Required

None

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

0860162001 and/or

0860162002

Hydraulic

Accumulators

1 C RWK 0860162002 R

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.
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DC Disposition

DIS Discard Part.

MUI Multiple Usage Item: Return to stock if serviceable.

RWK If affected replace existing part in accordance with this service bulletin and

enclosed VSB SB0860162002 ---32 ---2

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 part number.

X Reworked part and superseding part are functionally and physically

equivalent but not identical.

3. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set ---Up

(1) Placard and select all aircraft electrical power to OFF.

(2) Make sure that lock pins are installed thru each main gear and main gear door

mechanism.

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

(4) Install wheel chocks at the nose landing gear and the main landing gear.

(5) Depressurize hydraulic systems by applying aileron and rudder flight control

inputs.

(6) Deplete parking brake accumulator hydraulic pressure by applying and

releasing the EMERG. brake handle approximately 10 times.

(7) Install a warning sign on the external hydraulic connection.

(8) Position an electrically grounded workstand or ladder as required to gain access

to the parking brake accumulator (wing to fuselage ‘wing root’ right side)

(9) Remove the access panels 264DR and 262LT (Refer to AMM 06 ---40 ---10).
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B. Procedure

WARNING: OBEY ALL THE HYDRAULIC SAFETY PRECAUTIONS WHEN YOU DO

WORK ON THE HYDRAULIC SYSTEM OR A HYDRAULIC SYSTEM

COMPONENT. IF YOU DO NOT DO THIS, YOU CAN CAUSE INJURIES

TO PERSONS AND DAMAGE TO 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.

(1) Gain access to the parking brake accumulator (wing root right side, see Figure

1). Locate the data plate and record the part number and serial number of the

accumulator.

WARNING: HYDRAULIC FLUID MAY CAUSE SKIN IRRITATION. AVOID

PROLONGED OR REPEATED CONTACT WITH SKIN. IN CASE OF EYE

CONTACT, FLUSH EYES THOROUGHLY WITH WATER AND SEEK

PROMPT MEDICAL ATTENTION. IN CASE OF INGESTION, SEEK

PROMPT MEDICAL ATTENTION.

(2) To determine disposition of an existing Parking Brake Accumulator p/n

0860162002 compare the recorded part number & serial number on the

accumulator with the part numbers & serial numbers listed in section 1

PLANNING INFORMATION of enclosed TACTAIR VSB SB0860162002 ---32 ---1.

(a) If the part number & serial number appears in the enclosed TACTAIR VSB

replacement is required. Remove the “suspect” accumulator to agree with

procedures given in applicable AMM. For 100 and 300 series aircraft refer to

AMM Chapter 32 ---44 ---12. For 200 series aircraft refer to AMM TASK

32 ---44 ---12 ---000 ---809.

(b) If the part number & serial number does not appear in the TACTAIR SB

replacement is not required. No additional action is required (refer to the

Close Out section below).

(3) Install a “non suspect” parking brake hydraulic accumulator to agree with

procedures given in applicable AMM. For 100 and 300 series aircraft refer to

AMM Chapter 32 ---44 ---12. For 200 series aircraft refer to AMM TASK

32 ---44 ---12 ---400 ---802.
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WARNING: MAKE SURE THAT THE HYDRAULIC POWER IS SHUT OFF AND THAT

THE HYDRAULIC SYSTEM IS NOT PRESSURIZED. IF YOU DO NOT

DO THIS YOU CAN CAUSE INJURIES TO PERSONS AND/OR DAMAGE

TO EQUIPMENT.

(4) Make sure to do a visual check of the parking brake accumulator hydraulic and

pneumatic connections for leaks after the system is serviced then refer to the

Close Out section below.

C. Close Out

(1) Install access panels 264DR and 262LT.

(2) Remove all tools, equipment, and unwanted materials from the work area.

(3) On incorporation of this Service Bulletin, make an entry that conforms to local

regulatory requirements in the applicable logbook(s). Enter component serial

numbers if applicable. Enter numbers only after complete and functional

incorporation of all work defined in this service bulletin.

(4) If removed return “suspect” parking brake hydraulic accumulator to Tactair

Customer Support for replacement (refer to the MATERIAL INFORMATION

section in enclosed TACTAIR SB0860162002 ---32 ---1 for additional details).
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Parking Brake Accumulator --- Locator View

Figure 1

PARKING BRAKE

ACCUMULATOR
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This Page Intentionally Blank

2
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