# Bombardier Service Bulletin 8-32-170

Copy: No revision named ("U.S. DOT/FAA - Service Bulletin - SB-8-32-170"), 12 pages: PDF https://openairdocs.org/files/sha256/1b/38/1b38fa9dd4c5f6d5b95a326dc6da105ed2583f35eb8408e88814c6d9d2fd4e2e; text https://openairdocs.org/service-documents/bombardier/sb-8-32-170/file/1b38fa9dd4c5.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0271; AD 2012-14-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md)
- Type: Service bulletin (Service Bulletin)
- Number: 8-32-170
- Page: https://openairdocs.org/service-documents/bombardier/sb-8-32-170

## ADs that cite it (2) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2013-14-09](https://openairdocs.org/ad/2013-14-09.md), effective Sep 10, 2013: No revision named
- [AD 2012-14-04](https://openairdocs.org/ad/2012-14-04.md), effective Aug 27, 2012: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-8-32-170/proposed.md).

## Text (12 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0271; AD 2012-14-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

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SERVICE BULLETIN
Customer
Support
ATA SYSTEM: 3244 NUMBER: 8- - -32- - -170
BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARL Y SIGNIFICANT AND
URGES OPERATORS TO PROMPTL Y EVALUATE THE CONTENTS
SUBJECT : Landing Gear - - - Parking Brake System - - - Replacement of Suspect
Parking Brake Accumulators - - - Special Inspection & Rectification
1. PLANNING INFORMA TION
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 accumulators part
numbers (p/n) 0860162001 or 0860162002 (York Industries
Inc. or T actair Fluid controls Inc).
Refer to the “ Procedure” section step B. (2) for SERIAL
NUMBERS NOT AFFECTED”
NOTE: Refer to Service Bulletin 8- - -32- - -172 for a list of units which are subject to
FOC replacement.

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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:
Operators should check spares for existence of parking brake hydraulic
accumulators p/n 0860162001 or 0860162002. Accumulators with suspect
serial numbers are subject to replacement.
B. Reason
Problem: Screw caps and/or end caps attached at either end of parking brake
hydraulic accumulator (p/n 0860162001 or 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.
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 (or suspect) units,
the operator is instructed to remove t he existing “suspect” parking brake
accumulator and install a “non suspect” accumulator.
All removed “suspect” accumulators are rendered unserviceable.
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

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- - - the hydraulic pressure in the No.2 system is depleted
- - - an electrically grounded workstand or ladder is positioned under the right wing to
fuselage area (under the “wing root”)
- - - t w oa c c e s sp a n e la r er e m o v e d
- - - the parking brake accumulator is located
- - - the part number and serial number of the parking brake accumulator is recorded
and checked against the table given in the Procedure section step B. (2) to
determine disposition
- - - if required the parking brake accumulator is removed using existing AMM
procedures and rendered unserviceable
- - - 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
O r g a n i z a t i o n N o : D A O # 9 3 --- Q --- 0 2 .
F. M a n p o w e r
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:

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TASK M A N --- H O U R S
J o b S e t --- U p 1.00
Procedure 2.00
T e s t/R T S 1.00
Close- - -Out 1.00
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 T echnical Help Desk by telephone at 416- - -375- - -4000 or
email at : thd.qseries@aero.bombardier.com
G. Material - - - Price and Availability
Contact TACTAIR for price and availability at:
T actair Fluid Control Inc
Attn: Customer Support
4806 West T aft Road
Liverpool, NY 13088, USA
Phone (315) 451- - -3928
FAX (315) 457- - -5595
H. T ooling - - - 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....................
P S M 1 --- 8 2 --- 4 a n d
P S M 1 --- 8 3 --- 4

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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)
2. MATERIAL INFORMA TION
A. Parts Required Per Aircraft
If replacement of the parking brake accu mulator is required contact TACTAIR at:
T actair Fluid Control Inc
Attn: Customer Support
4806 West T aft Road
Liverpool, NY 13088, USA
Phone (315) 451- - -3928
FAX (315) 457- - -5595
B. Parts Required to Modify Spares
Same as above para.
C. Special T ools 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
p e rn e x th i g h e ra s s e m b l yf o ri n d e n t e dp a r t s .
Existing
Part Number Description Qty. IC DC
New Part
Number PNC
0860162001 and/or
0860162002
Hydraulic
Accumulators
1 C DIS 0860162002 R

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IC Interchangeability Code
A Not interchangeable.
B Removed Part. No direct replacement.
C Conditionally Interchangeable. Inst allation of superseded part negates the
intent of this service bulletin.
DC Disposition
DIS Discard Part (render unserviceable)
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 . J o b S e t --- U p
(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) De- - -pressurize hydraulic systems by applying aileron and rudder flight control
inputs.

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(6) Deplete parking brake accumulato r 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 a 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).
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 THOROUGHL Y WITH WATER AND SEEK
PROMPT MEDICAL ATTENTION. IN CASE OF INGESTION, SEEK
PROMPT MEDICAL ATTENTION.
(2) T o determine disposition of an existing Parking Brake Accumulator compare the
recorded part number & serial number on the accumulator with the part
numbers & serial numbers listed in the table below:

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Title
(a) If the part number & serial number appears in the table above no additional
action is required (refer to the Close Out section below).
(b) If the part number & serial number does not appear in the table above
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.
(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) If removed render “suspect” parking brak e hydraulic accumulator unserviceable.
(2) Install access panels 264DR and 262LT .
(3) Remove all tools, equipment, and unwanted materials from the work area.
(4) 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 this service bulletin number only after complete
and functional incorporation of all work defined in this service bulletin.

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Parking Brake Accumulator - - - Locator View
Figure 1
PARKING BREAK
ACCUMULATOR
SCREW CAP
SCREW CAP
3

### Page 11

Jan 2009
SERVICE BULLETIN (SB) - - - RECORD OF INCORPORATION
- - - Q SERIES DASH 8 AIRCRAFT
To : Partner Data Co- - -Ordinator (T oronto), Bombardier Aerospace Commercial Aircraft
Phone: (1) 416 375 3534 Facsimile: (1) 416 375 4538
E- -mai l: cmdb.requests@aero.bombardier .com
From:
Company:
Phone: Extn:
Facsimile: Date:
E- -mai l:
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

### Page 12

Feb 2009
SERVICE BULLETIN (SB) - - - COMMENT SHEET - - - Q SERIES DASH 8 AIRCRAFT
To : SB Focal (T oronto), Bombardier Aerospace Commercial Aircraft
Phone: (1) 416 375 4078 Facsimile: (1) 416 375 4538
E- -mai l: syed.rizvi@aero.bombardier .com
From:
Company:
Phone: Extn:
Facsimile: Date:
E- -mai l:
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 T ooling V References V Publications Affected
2. MATERIAL INFORMATION
V Kit Content V Special T ools/Equipment V Parts to Modify Spares
V Consumables V Disposition of Existing Parts V Other
3. ACCOMPLISHMENT INSTRUCTIONS
V J o b S e t --- U p V Procedure V Close- - -Out V Te s t
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

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