# Bombardier Service Bulletin 8-27-100

Copy: Revision A ("U.S. DOT/FAA - Service Information - 2"), 12 pages: PDF https://openairdocs.org/files/sha256/30/e0/30e016da66b7f064454c6929cf2be45ff33784a5b314e5c44ecde11ffb528f0e; text https://openairdocs.org/service-documents/bombardier/sb-8-27-100/file/30e016da66b7.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0422; AD 2012-15-16 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: 8-27-100
- Latest revision known: 8-27-100, Revision A, dated March 22, 2011 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bombardier/sb-8-27-100

## ADs that cite it (1) (OpenAirDocs)

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

- [AD 2012-15-16](https://openairdocs.org/ad/2012-15-16.md), effective Sep 12, 2012: Revision A

## Text (12 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2012-0422; AD 2012-15-16 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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Revision ’A’, 22 Mar 2011
SERVICE BULLETIN
Customer
Support
ATA SYSTEM: 2700 NUMBER: 8- - -27- - -100
BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARL Y SIGNIFICANT AND
URGES OPERATORS TO PROMPTL Y EVALUATE THE CONTENTS
SUBJECT : Flight Controls - - - Brake, Rudder Control - - - Replacement of Pushrod
Assembly to Substitute T4 with a T6 - - - ModSum 8Q101334
1. PLANNING INFORMA TION
A. Effectivity
Aircraft Affected:
In- - -Service: DHC- - -8 Aircraft Models 102, 103, 106, 201, 202, 301, 311,
314 and 315 Serial Numbers 464, 508, 511 thru 513, 515 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
82710274- - -001 P u s h r o d --- B r a k e ,
Rudder Pedal
Manufactured after April
1998
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:
- - - pushrods p/n 82710274- - -001 are removed and discarded
- - - replacement pushrods p/n 82710274- - -951 are installed
- - - removed pushrods are destroyed and discarded
- - - the system is rigged
- - - a functional test of the brake, rudder control system is performed
- - - close- - -out
D. Compliance
Bombardier Aerospace highly recommends that this modification be incorporated
at the operators earliest opportunity, unless otherwise directed by their
Airworthiness Authority.
A Transport Canada Airworthiness Directive is 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
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 8 man- - -hours to complete this service bulletin. 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 0.00
Procedure 7.00
T e s t/R T S 1.00
Close- - -Out 0.00
G. Material - - - Price and Availability
ModKit 8MK4282- - -001 is available through the Customer Accounts Service T eam
at Bombardier Aerospace Regional Aircraft division. Operators should submit a
purchase order specifying aircraft serial number(s) to:
Bombardier Aerospace
Customer Accounts Services T eam (Mail Stop N11- - -32)
123 Garratt Blvd.
To r o n t o
Ontario
Canada M3K- - -1Y5
Facsimile: (416) 375- - -3060
T elephone : (416) 375- - -3920
Kit Number Description Price (US$) Delivery
8MK4282- - -001 Retrofit Kit- - -Brake Rod
Assembly - - - Brake
Rudder
Quoted at
time of order
Will be given at
time of order
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....................

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Revision ’A’, 22 Mar 2011
P S M 1 --- 8 2 --- 4 a n d
P S M 1 --- 8 3 --- 4
Modifications Manual PSM 1- - -813- - -12...............................
L. References
Revision ‘A’ of this service bulletin was prepared to the engineering drawings and
related data that follows:
DRAWING SHEET REV
8MK4282 1 --- ---
Mod 8Q101334 Rev. ‘B’
PCA 4522 Revision - - - - - - (for internal reference only)
2. MATERIAL INFORMA TION
A. Parts Required Per Aircraft
(1) Modification Kit 8MK4282- - -001
(2) Detailed Kit Content:
Quantity Per Kit
--- 0 0 1
Part Number Description Remarks
4 MS24665- - -88 Cotter Pin
4 AN960D10L Washer
2 82710274- - -951 P u s h r o d --- B r a k e
B. Parts Required to Modify Spares
None
C. Special T ools 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
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
82710274- - -001 Pushrod 2 B DIS 82710274- - -951 S
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.
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.

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3. ACCOMPLISHMENT INSTRUCTIONS
A . J o b S e t --- U p
(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
C A U T I O N S d e t a i l e d i n M a i n t e n a n c e M a n u a l P S M 1 --- 8 --- 2 o r P S M 1 --- 8 2 --- 2 o r
P S M 1 --- 8 3 --- 2 .
B. Procedure
(1) Gain access to the brake, rudder control pushrods below the flight compartment
floor on the pilots and co- - -pilots side by removing access panels 121AL and
121BL per Maintenance Manual PSM 1- - -8- - -2 or PSM 1- - -82- - -2 or PSM 1- - -83- - -2
C h a p t e r 6 --- 4 0 --- 1 0 .
(2) Deleted
(3) Replace two pushrods 82710274- - -001 from the brake, rudder control assembly
on the pilot’s side as follows:
(a) Disconnect both ends of the pushrod by removing two cotter pins
MS24665- - -88, two nuts MS14144L3, two washers AN960D10L and two
bolts NAS6603D7. Keep all hardware except for washers and cotter pins
(refer to Figure 3).
(b) After removing each defective Pushrod (P/N 82710274- - -001) cut each part
into two pieces in a way that will render them UNSERVICEABLE, wire lock
the two pieces together. T ag the parts and dispose them as instructed by
your Local Airworthiness Authority.
(c) Install new pushrods 82710274- - -951 using kept hardware, new washers
AN960D10L and new cotter pins MS24665- - -88 (refer to Figure 3).
(4) Rig the rudder control system per Maintenance Manual PSM 1- - -8- - -2 or PSM
1 --- 8 2 --- 2 o r P S M 1 --- 8 3 --- 2 C h a p t e r 2 7 --- 2 0 --- 0 0 .
C. Close Out
(1) Remove all tools and equipment from the work area.
(2) Perform a functional test of the Brake System per Maintenance Manual PSM
1 --- 8 --- 2 o r 1 --- 8 2 --- 2 o r 1 --- 8 3 --- 2 C h a p t e r 3 2 --- 4 2 --- 0 0 .
(3) Install access panels 121AL and 121BL per Maintenance Manual PSM 1- - -8- - -2 or
P S M 1 --- 8 2 --- 2 o r P S M 1 --- 8 3 --- 2 C h a p t e r 6 --- 4 0 --- 1 0 .

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(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.
Figure 1
VIEW DELETED

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Figure 2

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View Looking Inboard on LH Side
Figure 3
COTTER PIN
MS24665- - -88
4R E Q U I R E D
WASHER
AN960D10L
4R E Q U I R E D
(BOLT NAS6603D7)
(NUT MS14144L3
PUSHROD
82710274- - -951
2R E Q U I R E D

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This Page Intentionally Blank
1

### 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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