Revision ‘B’ 19 Mar 2013 DHC-8 (DASH 8) SERVICE BULLETIN 84-28-10 Fuel System - Center Wing - Engine Fuel Feed Installation - Retrofit Kit, Inspect and Remove Clamps - ModSum 4-113722 This page transmits Revision ‘B’ of Service Bulletin 84-28-10, pages 1 thru 8, dated 19 Mar 2013. This service bulletin is re-issued in its entirety for the reasons that follow:

- the PLANNING INFORMATION sectionA Effectivityon page 1 is revised to add a statement ‘This Service Bulletin is required for operators that have incorporated ModSum IS4Q2800010’.

- the PLANNING INFORMATION section B Reason on page 2 is revised to change the way the ModSum references were given: was IS Mod 4Q2800010 now ModSum IS4Q2800010.

- the PLANNING INFORMATION section L Referenceson page 4 is revised to convey the latest revision of the service bulletin and engineering documentation. 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 revision of Service Bulletin 84-28-10 and replace with attached. Previous issues of Service Bulletin 84-28-10: Initial issue - Pages 1 thru 8 dated 06 Dec 2011 Revision A - Pages 1 thru 16 dated 17 Aug 2012 2

# D

S.B. 84-28-10 Page 1 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD 

# SERVICE BULLETIN Customer Support
ATA SYSTEM: 2800 NUMBER: 84-28-10 

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

SUBJECT: Fuel System - Center Wing - Engine Fuel Feed Installation - Retrofit Kit, Inspect and Remove Clamps - ModSum 4-113722

1. PLANNING INFORMATION A. Effectivity Aircraft Affected:

In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4003 thru 4151 This Service Bulletin is required for operators that have incorporated ModSum IS4Q2800010. 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 84-28-10

S.B. 84-28-10 Page 2 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD B. Reason Problem: Operators are installing new fuel line within the left and right wing fuel tanks in accordance with ModSum 4-113643 (SB 84-28-09). Supporting clamps and mounting hardware were installed by a previous ModSum IS4Q2800010, between Y154.825 and Y136.300 in LHS of wing. The fuel lines introduced by ModSum 4-113643 do not require the supporting provisions introduced by ModSum IS4Q2800010. Solution: ModSum 4-113722 removes clamps and related hardware installed to tube assembly 82822140 and tube assembly 82822131 in the left wing fuel tank. C. Description The procedures in this service bulletin give the instructions to do the tasks that follow: - aircraft is defueled - aircraft is put into a maintenance configuration, all aircraft power is selected to OFF, MLG lock pins are installed, NG ground lock is engaged, hydraulic systems pressure is depleted and work stands are set in position - wing access panel 522CT is opened - area between Y136.300 and Y157.825 is inspected for clamps and hardware attaching tube assembly P/N 82822140 and tube assembly 82822131 - If the clamps and hardware are installed, remove and discard as required - If no clamps exist, no additional action is required - access panel is installed - close out. D. Compliance Bombardier Inc. highly recommend that ModSum 4-113722 be incorporated at the earliest opportunity unless otherwise directed by the operator’s airworthiness authority. Transport Canada Airworthiness Directive pending

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 3 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 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 NOTE: To reduce down time both service bulletins 84-28-10 and 84-28-09 may be done concurrently. It will take an estimated 7.50 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 2.00* Procedure 0.50 Test / RTS 1.00 Close-Out 2.00 *Does not include time to drain the fuel tanks. 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 None

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 4 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD This service bulletin is self-contained. No drawings will be issued for this service bulletin. H. Tooling - Price and Availability None I. Weight and Balance None J. Electrical Load Data Not affected K. Publications Affected 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: DRAWING SHEET REV

8DK4181 1

- ModSum 4Q113722 Rev. ‘B’ ModSum 4-113722 Rev. ‘B’ PCA 42939 Revision 6 (for internal reference only) Transport Canada Airworthiness Directive pending

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 5 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD 2. MATERIAL INFORMATION A. Parts Required Per Aircraft None B. Parts Required to Modify Spares None C. Special Tools and Equipment Required None D. Existing Parts Accountability None 3. ACCOMPLISHMENT INSTRUCTIONS A. Job Set-Up (1) Placard and select all aircraft electrical power to OFF. Obey all relevant WARNINGS and CAUTIONS. Refer to applicable instructions in AMM PSM 1-84-2, TASKs 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. (3) Make sure the nose gear ground lock is engaged. (4) Set up the work platforms or ladders as required to gain access to wing access panel 522CT (refer to AMM TASKs 06-41-00-992-808). Make sure the work platforms or ladders are electrically grounded.

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 6 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD (5) Remove and retain wing access panel 522CT. Refer to applicable instructions in AMM TASK 57-11-01-000-801. B. Procedure (1) Inspect fuel tank area between Y136.300 and Y157.825. If clamp MS21919WDF-12, clamp MS21919WDF-16 screw NAS1801-3-16, washers AN960D10L, spacer NAS43DD3-32FC and nut MS21042L3 are installed to tube assembly 82822140 and tube assembly 82822131 remove and discard as required. Refer to Figure 1 and Figure 2. (2) If clamps and related hardware are not installed, no additional action is required. (3) Install retained wing access panel 522CT. Refer to applicable instructions in AMM PSM 1-84-2, TASK 57-11-01-400-801. C. Close Out (1) Remove all tools and equipment from the work area. (2) On incorporation of this ModSum, make an entry that conforms to local regulatory requirements in the applicable logbook(s). Enter this ModSum number only after complete and functional incorporation of all work defined in this service bulletin.

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 7 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD Engine Fuel Feed Line - Clamp Removal Procedure-Locator Figure 1 Rework Location, Refer To Figure 2

### SERVICE BULLETIN 84-28-10

S.B. 84-28-10 Page 8 of 8 06 Dec 2011 Revision ‘B’ 19 Mar 2013 MD Engine Fuel Feed Line - Clamp Removal Procedure Figure 2 WASHER NAS1801-3-16 SCREW SPACER NAS43DD3-32FC

AN960D10L CLAMP MS21919WDF-12 CLAMP MS21919WDF-16NUT, SELFLOCKING MS21042L3

82822140

82822131 TUBE ASSY TUBE ASSY

3 4Jan 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 VTooling 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 VTest 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