Revision ‘A’ 09 Jun 2014 DHC-8 (DASH 8) SERVICE BULLETIN 84-28-14 Fuel System - Center Wing - Engine Fuel Feed Installation - New Retrofit Kit To Eliminate Fouling Condition - ModSum 4-113754 This page transmits Revision ‘A’ of Service Bulletin 84-28-14, pages 1 thru 12, dated 09 Jun 2014. This service bulletin is re-issued in its entirety for the reasons that follow: - the Description section revised to remove an extra ‘access panel’ from component - theCompliancesection revised to add the applicable AD number - the Material - Price and Availabilitysection is revised with updated format - the Publications Affected section is revised with Weight and Balance manual deleted - the Referencessection is revised to convey the latest revision of the service bulletin and engineering documentation - step3.C.(2) of theACCOMPLISHMENT INSTRUCTIONSsection is revised with TASK reference changed to ‘TASK 57-11-01-400-801’. The Compliance in the previous issue(s) of this service bulletin is not affected by this revision. No additional rework to the aircraft is introduced by this revision. Remove the initial issue of Service Bulletin 84-28-14 and replace with attached. Previous issue(s) of Service Bulletin 84-28-14: Initial issue - Pages 1 thru 12 dated 17 Aug 2012

# D

S.B. 84-28-14

Page 1 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG 

# SERVICE BULLETIN Customer Support
ATA SYSTEM: 2812 NUMBER: 84-28-14 

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

SUBJECT: Fuel System - Center Wing - Engine Fuel Feed Installation - New Retrofit Kit To Eliminate Fouling Condition - ModSum 4-113754

1. PLANNING INFORMATION A. Effectivity Aircraft Affected: In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001, 4003, 4004, 4006, 4008 thru 4417.
NOTE: ModSum 4-113643 (Bombardier Service Bulletin 84-28-09) is a prerequisite to this ModSum.

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

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 2 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG B. Reason Problem: A fouling condition exists in the right hand fuel tank at Yw157.825 between tube assembly 82822144-003 and the wing structure. Solution: Introduce a new retrofit kit which replaces existing tube assembly 82822144-003 with a new tube assembly. C. Description The procedures in this service bulletin give the instructions to do the tasks that follow: - 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 - the fuel tanks are drained, aircraft electrical power is removed and the engines are supported - access panel 623AT is removed - tube assembly 82822144-003 and O-rings are removed and discarded. Existing threadless couplings are kept - new tube assembly 82822144-005 is installed with new O-rings and kept threadless coupling - a pressure test of new tube assembly 82822144-005 is done - close out. D. Compliance Bombardier Inc. highly recommend that ModSum 4-113754 be incorporated at the earliest opportunity unless otherwise directed by the operator’s airworthiness authority. Transport Canada Airworthiness Directive CF-2013-09R1. 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.

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 3 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs). F. Manpower It will take an estimated 2.00 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 0.50 Procedure 0.50 Test / RTS 0.50 Close-Out 0.50 For any on-site labor assistance, please contact 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 ModKit(s) required to do this service bulletin are listed in the table below: Operators should submit a purchase order through the Customer Accounts Service Team (CAST) at Bombardier Aerospace Regional Aircraft division specifying aircraft serial number(s) to: 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 Facsimile: International: (416) 375-3334 European: (416) 373-5966 Americas East: (416) 373-5964 Americas West: (416) 373-5965

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 4 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG Telephone: International: (416) 375-3706 European: (416) 373-3704 Americas East: (416) 375-3700 Americas West: (416) 373-5888 E-mail addresses: International: cast.international@aero.bombardier.com European: cast.europe@aero.bombardier.com Americas East: cast.americaseast@aero.bombardier.com Americas West: cast.americaswest@aero.bombardier.com
Kit Number Description 8MK4498-001 Retrofit - Engine Fuel Feed Installation
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 1-84-4

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

.................................. Weight and Balance Manual (Imperial) PSM 1-84-8

................ L. References Revision ‘A’ of this service bulletin was prepared to the engineering drawings and related data that follows: DRAWING SHEET REV 8MK4498 1

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### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 5 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG ModSum 4-113754 Rev. ‘B’ ModSum 4Q113754 Rev. ‘B’ Bombardier Service Bulletin 84-28-09 Rev. ‘C’ (ModSum 4-113643) Bombardier Service Bulletin 84-28-13 (ModSum 4-113745) Bombardier Service Bulletin 84-28-13 (ModSum 4-113745) PCA 44006 Revision 0 (for internal reference only) Transport Canada Airworthiness Directive CF-2013-09R1 dated 28 May 2013
2. MATERIAL INFORMATION A. Parts Required Per Aircraft (1) Modification Kit 8MK4498-001, Retrofit - Engine Fuel Feed Installation (2) Detailed Kit Content:

Quantity Per Kit -001 Part Number Description Remarks

1 82822144-005 Tube Assembly 2 MS29513-214 Packing, O-Ring 1 MS29513-215 Packing, O-Ring Listed drawings that are required to complete the kits above can be requested by writing to the following e-mail address: qseriesdwgrequest@aero.bombardier.com B. Parts Required to Modify Spares None

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 6 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG 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 82822144-003 Tube Assembly 1 A DIS 82822144-005 N 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.

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 7 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG 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 IN THE DOOR MECHANISMS OF THE MLG AND NLG. THE DOOR MECHANISMS CAN ACCIDENTALLY CLOSE THE LANDING GEAR DOORS. 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. (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. (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) Set up work platforms and/or ladders to permit access to right wing fuel tank access panel 623AT. 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.

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 8 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG (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 the applicable instructions in AMM TASK 57-11-01-000-801 and remove right wing fuel tank access panel 623AT. (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(s). 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 the applicable steps in AMM TASK 28-21-06-000-801 and remove and discard tube assembly 82822144-003. Keep threadless couplings B0305080A16C and discard all O-rings. NOTE: When installing new tube assembly 82822144-005, connect shorter leg (9.67 inches, reference Figure 1) of the tube to the fitting on the front spar first. (2) Refer to the applicable steps in AMM TASK 28-21-06-400-801 and install new tube assembly 82822144-005 with two new O-rings MS29513-214 (reference Figure 2) , one new O-ring MS29513-215 (reference Figure 3) and kept threadless couplings B0305080A16C. C. Close Out (1) Refer to AMM TASK 28-21-00-780-801 and do a pressure test of new tube assembly 82822144-005. During the pressure test, monitor the position of tube assembly 82822144-005 and make sure a 0.125 inch (1/8 inch) gap is kept between tube assembly and wing structure including ribs.

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 9 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG (2) Refer to AMM TASK 57-11-01-400-801 and install right wing fuel tank access panel 623AT. (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.

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 10 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG View Looking Down On Right Hand Wing Figure 1 TUBE ASSEMBLY 82822144-005

ENGINE FEED SYSTEM 82822143-103 THREADLESS COUPLING ASSEMBLY B0305080A16C FUEL FEED INSTALLATION 82822004

DETAIL B

DETAIL A

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 11 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG Detail A Figure 2 PACKING, O-RING MS29513-214 QTY: 2 TUBE ASSEMBLY 82822144-005 THREADLESS COUPLING ASSEMBLY B0305080A16C
ENGINE FEED SYSTEM 82822143-103

### SERVICE BULLETIN 84-28-14

S.B. 84-28-14 Page 12 of 12 17 Aug 2012 Revision ‘A’ 09 Jun 2014 MG Detail B Figure 3 O-RING PACKING MS29513-215

TUBE ASSEMBLY 82822144-005 THREADLESS COUPLING ASSEMBLY B0305080A16C FUEL FEED INSTALLATION 82822004

1 2Jan 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 VWeight 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