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Revision ‘A’ 15 Jan 2014 DHC-8 (DASH 8) SERVICE BULLETIN 84-26-15 Fire Protection - Extinguishing System - Forward Baggage Compartment - Center Fuse - ModSum 4-190360 This page transmits Revision ‘A’ of Service Bulletin 84-26-15, pages 1 thru 18 dated 15 Jan 2014.
This service bulletin is re-issued in its entirety for the reasons that follow:
-t h e Description section is revised to add a new paragraphs -t h e References section is revised to update the status of the engineering documentation and service bulletin -t h e ACCOMPLISHMENT INSTRUCTIONS section is revised to add additional steps in Part A and to delete step 20 in Part B (no electrical bonding check required) The Compliance recommendation 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 84-26-15 and replace with attached.
Previous issues of Service Bulletin 84-26-15:
Initial issue - Pages 1 thru 16 dated 07 Jun 2013
No text on this page: it may be a figure. Open the PDF to see it.
D S.B. 84-26-15 Page 1 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR
SERVICE BULLETIN Customer Support ATA SYSTEM: 2622 NUMBER: 84-26-15
BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND
URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS SUBJECT: Fire Protection - Extinguishing System - Forward Baggage Compartment - Center Fuse - ModSum 4-190360
1. PLANNING INFORMATION NOTE: This service bulletin supercedes Service Bulletin 84-26-13.
A. Effectivity Aircraft Affected:
In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001, 4003 thru 4424.
Production: ModSum 4Y123816 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4425 thru 4449.
Production: ModSum 4Y123869 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4450 thru 4799.
Production: ModSum 4-113741 will be installed before delivery on applicable DHC-8 Aircraft at Serial Number 4800 and subsequent.
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 2 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR 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 B. Reason Problem: There have been reports of severe corrosion on the firex distribution lines to the forward baggage compartment which has resulted in perforations of some of the tubes. This could result in insufficient extinguishing agent reaching the forward baggage compartment in the event of a fire situation.
Solution: This service bulletin provides instructions to inspect the tubes for leaks and instructions to replace the alumunum tubes with stainless steel tubes.
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
- the discharge head tube in the forward baggage compartment is plugged with a plug
- dry nitrogen is connected to the aft pressure bulkhead connection
- the tubing is pressurized to check for leaks
- if no leaks are found, system is put back to normal and the leak test is repeated after a specific period until all tubes are replaced with stainless steel
- If leak test fails, all aluminum tubing is replaced before next flight
- or the forward baggage compartment is placarded to inhibit use of forward baggage compartment until the aluminum tubing is replaced with stainless steel tubing within 10 days
- a leak check is done on the new tubes
- close out.
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 3 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR D. Compliance Bombardier Inc. recommends incorporation of ModSum 4-190360 as follows, unless otherwise directed by the operator’s airworthiness authority:
For aircraft more than 12,000 FH or 6 years:
- Inspection: initially within 2,000 FH or 1 year and subsequently at intervals not to exceed 2,000 FH or 1 year
- Replace tubes within 6,000 FH or 3 years with CRES tubing For aircraft less than 12,000 FH or 6 years:
- Inspection: initially prior to reaching 12,000 FH or 6 years and subsequently at intervals not to exceed 2,000 FH or 1 year
- Replace: prior to accumulating 18,000 FH or 9 years with CRES tubing Transport Canada Airworthiness Directive 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 Organization No: DAO #93-Q-02.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs).
F. Manpower PART A - Integrity Check of Firex Distribution Lines It will take an estimated 1.00 man-hours to complete PART A of the ACCOMPLISHMENT instructions in this s ervice bulletin. The breakdown of man -hours is shown in the table that follows:
TASK MAN-HOURS Job Set-Up 0.25 Procedure in Part A 0.25 Test / RTS 0.25 Close-Out 0.25
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 4 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR PART B - Tube Replacement It will take an estimated 41.00 man-hours to complete PART B of the ACCOMPLISHMENT instructions in this s ervice bulletin. The breakdown of man -hours is shown in the table that follows:
TASK MAN-HOURS Job Set-Up 0.25 Procedure in Part B
40.00 Test / RTS 0.50 Close-Out 0.25 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 ModKit(s) required to do this service bulletin are listed in the table below:
Operators should submit a purchase orde r 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 84-26-15 S.B. 84-26-15 Page 5 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR 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 8MK4652-001/-003/-051 Kit -Tube Installation Fire Protection System Forward Baggage C/Fuse NOTE: Kit 8MK4652-051 required only if Kit 8MK4598 was ordered from previous S.B. 84-26-13.
H. Tooling - Price and Availability None I. Weight and Balance A/C Type and Model Weight (Lb) Arm (Inches) Moment (Inches x Lb) x 0.001 DHC-8 Model 401 +9.5 418.2 4.0 DHC-8 Model 402 +9.5 418.2 4.0 J. Electrical Load Data Not affected
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 6 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR 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................
Weight and Balance Manual (Metric) PSM 1-84-8M..................
L. References Revision ‘A’ of this service bulletin was prepared to the engineering drawings and related data that follows:
DRAWING SHEET REV 8MK4652 1 -- 8Z9546 1 A 8Z9546 2 -- 8Z9546 3 -- 8Z9546 4 -- 8Z9546 5 -- ModSum 4Q190360 Rev. ‘A’ ModSum 4-190360 Rev. ‘A’ PCA 43731 Revision 2 (for internal reference only) Transport Canada Airworthiness Directive Pending ADR SGUT-13-22137760, ABOE-13-21740728, MFU-13-28731247 (for internal reference only)
2. MATERIAL INFORMATION A. Parts Required Per Aircraft
(1) Modification Kit 8MK4652-001 for aircraft serial numbers 4001, 4003 thru 4016.
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 7 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR
(2) Modification Kit 8MK4652-003 for aircraft serial numbers 4017 thru 4424.
(3) Detailed Kit Content:
Quantity Per Kit -003 -001 Part Number Description Remarks 40 40 NAS1149C0316R WASHER 11 11 NAS1149C0363R WASHER 11 AN924-8J NUT 11 AN901-8C GASKET 11 B0313006J8 ELBOW 21 21 NAS1802-3-10 SCREW 99 MS35338-138 SPRING, WASHER 10 10 MS25083-2BB6 JUMPER 11 11 MS21043-3 NUT 18 18 B0313001J8 UNION 11 11 AN735C8 CLAMP 11 82620158-003 TUBE ASSEMBLY 11 82620157-007 TUBE ASSEMBLY 11 82620156-003 TUBE ASSEMBLY 11 82620155-007 TUBE ASSEMBLY 11 82620154-005 TUBE ASSEMBLY 11 82620149-003 TUBE ASSEMBLY 11 82620148-005 TUBE ASSEMBLY 11 82620147-003 TUBE ASSEMBLY 11 82620146-007 TUBE ASSEMBLY 11 82620145-009 TUBE ASSEMBLY 11 82620144-007 TUBE ASSEMBLY 11 82620143-007 TUBE ASSEMBLY 11 82620142-005 TUBE ASSEMBLY 11 82620141-005 TUBE ASSEMBLY 11 82620140-003 TUBE ASSEMBLY 11 82620139-005 TUBE ASSEMBLY 11 82620138-005 TUBE ASSEMBLY 11 82620137-003 TUBE ASSEMBLY 1 82620136-009 TUBE ASSEMBLY
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 8 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR Quantity Per Kit -003 -001 RemarksDescriptionPart Number 1 82620136-007 TUBE ASSEMBLY
(4) Modification Kit 8MK4652-051 for operators who have kit 8MK4598-001 and/or -003 from S.B. 84-26-13.
(5) Detailed Kit Content:
Quantity Per Kit -051 Part Number Description Remarks 1 82620145-009 Tube Assembly see NOTE below NOTE: Operators that have kit 8MK4598-001 and/or 8MK4598-003 in stock only need to order delta kit 8MK4652-051.
Tube assembly 82620145-009 is two way interchangeable with tube assembly 82620145-007 (part of 8MK4598-001/-003). Operators can use either tube assembly pending ease of installation.
B. Parts Required to Modify Spares None C. Special Tools and Equipment Required Reference Designation Remarks AN806-D8 Plug Regulated Nitrogen Supply 300 PSI capability 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 .
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 9 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR Existing Part Number Description Qty. IC DC New Part Number PNC 82620136 82620137 82620138 82620139 82620140 82620141 82620142 82620143 82620144 82620145 82620146 82620147 82620148 82620149 82620154 82620155 82620156 82620157 82620158 Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly Tube Assembly 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 B B B B B B B B B B B B B B B B B B B DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS 82620136-007 or -009 82620137-003 82620138-005 82620139-005 82620140-003 82620141-005 82620142-005 82620143-007 82620144-007 82620145-007 or -009 82620146-007 82620147-003 82620148-005 82620149-003 82620154-005 82620155-007 82620156-003 82620157-007 82620158-003 S S S S S S S S S S S S S S S S S S 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.
SERVICE BULLETIN 84-26-15 S.B. 84-26-15 Page 10 of 18 07 Jun 2013 Revision ‘A’ 15 Jan 2014 JR 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 Part A - INSPECTION (Integrity Check of Firex Distribution Lines) 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.
(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 through each main gear and main gear door mechanism.
(3) Make sure the nose gear ground lock is engaged.