Revision ‘B’ 24 Sep 2012 DHC-8 (DASH 8) SERVICE BULLETIN 84-26-08 Fire Protection - Fire Detection - Replacement of Fire/Overheat Detector P/N 10-1098 with 10-1098-01 - Engine Primary Zone - ModSum 4-113713 This page transmits Revision ‘B’ of Service Bulletin 84-26-08, pages 1 thru 10 dated: 24 Sep 2012. This service bulletin is re-issued in its entirety with the changes that follow: - the Description section is revised to clarify steps for item to be removed - theCompliancesection is revised to add -Transport Canada Airworthiness Directive CF-2012-07 issued. - the Referencessection is revised to convey the latest issue of the service bulletin and to update engineering documents. Also to add- Transport Canada Airworthiness Directive CF-2012-07 issued. - theACCOMPLISHMENT INSTRUCTIONSsection is revised to clarify steps for the Removal and Installation of the Landing Light Leading Edge. The Compliance in the previous issue of this service bulletin is not affected by this revision. No additional rework to the aircraft is introduced by this revision. Remove the previous issue of Service Bulletin 84-26-08 and replace with attached. Previous issue of Service Bulletin 84-26-08: Initial issue - Pages 1 thru 10 dated 11 Mar 2011 Rev A - Pages 1 thru 10 dated 12 May 2011

# D

S.B. 84-26-08

Page 1 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD 

# SERVICE BULLETIN Customer Support
ATA SYSTEM: 2611 NUMBER: 84-26-08 

### BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Fire Protection - Fire Detection - Replacement of Fire/Overheat Detector P/N 10-1098 with 10-1098-01 - Engine Primary Zone - ModSum 4-113713
1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001 thru 4373. Production: ModSum 4-113713 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4374 thru 4383. Production: Equivalent production ModSum 4V113079 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4384 and subsequent. 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.

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 2 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD Spares Affected:

Part Number Description 10-1098 Fire/Overheat Detector B. Reason Kidde Aerospace and Defense has modified the Fire/Overheat Detector (APD - Advance Pneumatic Detector) internal design to eliminate false fire indication after fire has been extinguished. 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 - aircraft electrical power is removed - the nose landing gear lock is engaged - the main landing gear lock pins are installed thru each main gear and main gear door mechanism - center wing leading edge is removed - landing lights leading edge is removed (If necessary) - forward nacelle fairing is removed - existing Fire/Overheat Detector P/N 10-1098 on both nacelles is replaced - an operational test of the nacelle fire detection system is done - close out. D. Compliance Bombardier Inc. recommends incorporation of ModSum 4-113713 at the earliest opportunity unless otherwise directed by the operator’s airworthiness authority. Transport Canada Airworthiness Directive CF-2012-07 issued.

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 3 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD 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. This Service Bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs). F. Manpower It will take an estimated 25 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/Gain Access 8.00 Procedure 6.00 Test / RTS 1.00 Close-Out 10.00 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 Technical Help Desk by telephone at 416-375-4000 or email at: thd.qseries@aero.bombardier.com G. Material - Price and Availability The part detailed in Paragraph 2.A. may be obtained from any Bombardier Aerospace Regional Aircraft authorized parts source. The price and availability will be quoted at the time of order. 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 H. Tooling - Price and Availability

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 4 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD None I. Weight and Balance None J. Electrical Load Data Not affected K. Publications Affected Dash 8 Illustrated Parts Catalogue PSM 1-84-4

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

.................................. L. References Revision ‘B’ of this service bulletin was prepared to the engineering drawings and related data that follows: ModSum 4Q113713 Rev. ‘C’ ModSum 4-113713 Rev. ‘C’ ModSum 4K113713 Rev. ‘B’ PCA 42588 Revision 0 (for internal reference only) Transport Canada Airworthiness Directive Pending Kidde Aerospace Service Bulletin 10-1098-26-485 dated: Jan 20/11 Transport Canada Airworthiness Directive CF-2012-07 issued. 2. MATERIAL INFORMATION A. Parts Required Per Aircraft Quantity Per Aircraft Part Number Description Remarks

2 10-1098-01 Fire/Overheat Detector B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 5 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD 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 10-1098 Fire/Overheat Detector 2 B DIS 10-1098-01 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/Gain Access (1) Placard and select all aircraft electrical power to OFF. Obey all relevant WARNINGS and CAUTIONS (refer to AMM TASK’S 24-00-00-861-802 and 24-00-00-910-801). (2) Make sure that lock pins are installed thru each main gear and main gear door mechanism.

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 6 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD (3) Make sure the nose gear ground lock is engaged. (4) Set up work platforms or ladders as required to gain access to left and right engine nacelles. Make sure the work platforms or ladders are electrically grounded. (5) Remove center wing leading edge. Refer to Maintenance Manual Task 57-13-01-000-801. (6) Remove the landing light leading edge panels 512AL & 612 AR, If required for the release of the leading edge fairing assembly 87144008. Refer to Maintenance Manual Task 57-23-01-000-801. (7) Remove leading edge fairing assembly 87144008 on the forward nacelle. Refer to Figure 1. B. Procedure (1) Remove existing left and right engine primary zone advance pneumatic detector (Fire/Overheat Detector P/N 10-1098). Refer to Maintenance Manual Task 26-11-01-000-801 and enclosed Kidde Aerospace Service Bulletin 10-1098-26-485. (2) Install on the left and right engine primary zone advance pneumatic detector (Fire/Overheat Detector P/N 10-1098-01). Refer to Maintenance Manual Task 26-11-01-400-801 and enclosed Kidde Aerospace Service Bulletin 10-1098-26-485. C. Close Out (1) Remove all tools and equipment from the work area. (2) Install leading edge fairing assembly 87144008 on the forward nacelle. Refer to Figure 1. (3) Install landing light leading edge (If removed) panels 512AL & 612 AR. Refer to Maintenance Manual Task 57-23-01-400-801. (4) Install center wing leading edge. Refer to Maintenance Manual Task 57-13-01-400-801. (5) 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.

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 7 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD Leading Edge Fairing Figure 1 LEADING EDGE FAIRING 87144008

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 8 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 9 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD

### SERVICE BULLETIN 84-26-08

S.B. 84-26-08 Page 10 of 10 11 Mar 2011 Revision ‘B’ 24 Sep 2012 MD 1Jan 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.comFeb 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 VApproval 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