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T x L t r S B 8 --- 3 2 --- 1 7 9Revision ‘A’ 09 Mar 2017 NB Page 1 of 2 D H C --- 8 ( D A S H 8 ) S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 Landing Gear - - - Main Landing Gear Retraction Actuator Rod End Rework - - - ModSum 8Q113021 This page transmits Revision ‘A’ of Service Bulletin 8- - -32- - -179, pages 1 thru 6, dated 09 Mar 2017.
This service bulletin is re- - -issued in its entirety for the reasons that follow:
--- t h eSUBJECT title is revised --- t h eCompliance section is revised to change ModSum 8Q113023 to ModSum 8Q113021 and to add the Transport Canada Airworthiness Directive number --- t h eReferences section is revised to convey the latest revision of the service bulletin and to add the Transport Canada Airworthiness Directive number --- t h eParts Required Per Aircraft table is revised to show the specific new and old part numbers of the MLG Retraction Actuator Assembly --- t h eJ o b S e t --- U psection step (1) is revised to change the AMM TASK 24- - -00- - -00910- - -803 to TASK 24- - -00- - -00- - -910- - -803.
--- t h eProcedure section is revised to add the word ‘actuator’ between ‘retraction’ and ‘assembly’ --- t h e a t t a c h e d V S B s M B D S B D H C 8 --- 3 2 --- 0 9 9 R 1 a n d M B D S B D H C 8 --- 3 2 --- 1 0 0 R 1 a r e r e p l a c e d w i t h V S B s M B D S B D H C 8 --- 3 2 --- 0 9 9 R 3 a n d M B D S B D H C 8 --- 3 2 --- 1 0 0 R4, respectively.
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 8- - -32- - -179 and attached VSBs, and replace with attached.
Previous issue(s) of Service Bulletin 8- - -32- - -179:
Initial issue - - - Pages 1 thru 6 dated 10 Jul 2015.
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 T x L t r S B 8 --- 3 2 --- 1 7 9Revision ‘A’ 09 Mar 2017 NB Page 2 of 2 This Page Intentionally Blank 1
D S . B . 8 --- 3 2 --- 1 7 9 Page 1 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017
SERVICE BULLETIN Customer Support ATA SYSTEM: 3230 NUMBER: 8- - -32- - -179
BOMBARDIER AEROSPACE CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARL Y SIGNIFICANT AND
URGE OPERATORS TO PROMPTL Y EVALUATE THE CONTENTS SUBJECT : Landing Gear - - - Main Landing Gear Retraction Actuator Rod End Rework - - - ModSum 8Q113021
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 003 thru 672 with retraction actuator 10500- - -101 or - - -103 or - - -501 or - - -551 or - - -553 installed.
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.
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 S . B . 8 --- 3 2 --- 1 7 9 Page 2 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017 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.
Part Number Description 10500- - -101 or - - -103 or - - -501 or --- 5 5 1 o r --- 5 5 3 MLG Retraction Actuator Assembly B. Reason Problem: An operator reported experiencing an un- - -damped free- - -fall extension of the MLG that was caused by the failure of the retraction actuator rod end.
Cause: The root cause of the retraction actuator rod end failure was a thread manufacturing deficiency. A number of rod ends have been manufactured with a non conforming thread. The non- - -conforming thread (UNF instead of UNJF) is susceptible to early fatigue failure due to the smaller thread root radius.
Solution: This service bulletin replaces the existing rod end subassembly in each nacelle that has the non- - -conforming threads with new rod end subassembly that has threads which fully conform to design requirements.
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 retraction actuator is removed from the aircraft
- - - the actuator rod end subassembly is removed and replaced
- - - the retraction actuator is installed on the aircraft
- - - close out.
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 S . B . 8 --- 3 2 --- 1 7 9 Page 3 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017 D. Compliance Bombardier Inc. highly recommend that ModSum 8Q113021 be incorporated at the earliest opportunity unless otherwise directed by the operator’s airworthiness authority.
Transport Canada Airworthiness Directive CF- - -2016- - -36 has been issued.
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 .
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage T olerance Inspections (DTIs).
F. M a n p o w e r It will take an estimated 3.00 man- - -hours per side to complete this service bulletin.
The breakdown of the man- - -hours is shown in the table that follows:
TASK M A N --- H O U R S J o b S e t --- U p 0.50 Procedure 2.00 T e s t/R T S 0.00 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 T echnical Help Desk by telephone at 416- - -375- - -4000 or email at: thd.qseries@aero.bombardier.com.
G. Material - - - Price and Availability Refer to attached SAFRAN Messier- - -Bugatti- - -Dowty Service Bulletin No. MBD S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 a s a p p l i c a b l e .
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 S . B . 8 --- 3 2 --- 1 7 9 Page 4 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017 H. T ooling - - - Price and Availability Refer to attached SAFRAN Messier- - -Bugatti- - -Dowty Service Bulletin No. MBD S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 a s a p p l i c a b l e .
I. Weight and Balance None J. Electrical Load Data Not affected K. Publications Affected Modifications Manual PSM 1- - -813- - -12...............................
L. References Revision ‘A’ of this service bulletin was prepared to the data that follows:
ModSum 8Q113021 Rev. ‘A’ PCA 7618 Revision 0 (for internal reference only) S A F R A N M e s s i e r --- B u g a t t i --- D o w t y S e r v i c e B u l l e t i n N o . M B D S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 Transport Canada Airworthiness Directive CF- - -2016- - -36.
2. MATERIAL INFORMA TION A. Parts Required Per Aircraft New Part No. Keyword Old Part No.
10500- - -105 or Refer to attached SAFRAN M e s s i e r --- B u g a t t i --- D o w t y S e r v i c e B u l l e t i n N o . M B D S B D H C 8 --- 3 2 --- 0 9 9 MLG Retraction Actuator Assembly 10500- - -101, - - -103
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 S . B . 8 --- 3 2 --- 1 7 9 Page 5 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017 New Part No. Old Part No. Keyword 10500- - -503 or Refer to attached SAFRAN M e s s i e r --- B u g a t t i --- D o w t y S e r v i c e B u l l e t i n N o . M B D S B D H C 8 --- 3 2 --- 0 9 9 MLG Retraction Actuator Assembly 10500- - -501 10500- - -555 or Refer to attached SAFRAN M e s s i e r --- B u g a t t i --- D o w t y S e r v i c e B u l l e t i n N o . M B D S B D H C 8 --- 3 2 --- 1 0 0 MLG Retraction Actuator Assembly 10500- - -551, - - -553 B. Parts Required to Modify Spares None C. Special T ools and Equipment Required Refer to attached SAFRAN Messier- - -Bugatti- - -Dowty Service Bulletin No. MBD S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 a s a p p l i c a b l e .
D. Existing Parts Accountability Refer to attached SAFRAN Messier- - -Bugatti- - -Dowty Service Bulletin No. MBD S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 a s a p p l i c a b l e .
3. ACCOMPLISHMENT INSTRUCTIONS A . J o b S e t --- U p
(1) Placard and select all aircraft electrical power to OFF . Obey all relevant W A R N I N G S a n d C A U T I O N S ( r e f e r t o P S M 1 --- 8 --- 2 , 1 --- 8 3 --- 2 o r A M M C h a p t e r s 1 2 a n d 2 4 o r 1 --- 8 2 --- 2 T A S K 1 2 --- 0 0 --- 0 5 --- 0 3 a n d T A S K 24- - -00- - -00- - -910- - -803).
(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.
B. Procedure ( 1 ) R e m o v e t h e r e t r a c t i o n a c t u a t o r ( r e f e r t o P S M 1 --- 8 --- 2 o r 1 --- 8 3 --- 2 C h a p t e r 32- - -30- - -11 or PSM 1- - -82- - -2 TASK 32- - -31- - -11- - -000- - -801).
S E R V I C E B U L L E T I N 8 --- 3 2 --- 1 7 9 S . B . 8 --- 3 2 --- 1 7 9 Page 6 of 6 10 Jul 2015 NB Revision ‘A’ 09 Mar 2017
(2) Replace the rod end subassembly of the MLG retraction actuator assembly per the accomplishment instructions given in the attached SAFRAN M e s s i e r --- B u g a t t i --- D o w t y S e r v i c e B u l l e t i n N o . M B D S B D H C 8 --- 3 2 --- 0 9 9 o r M B D S B D H C 8 --- 3 2 --- 1 0 0 a s a p p l i c a b l e .
( 3 ) I n s t a l l t h e r e t r a c t i o n a c t u a t o r ( r e f e r t o P S M 1 --- 8 --- 2 o r 1 --- 8 3 --- 2 C h a p t e r 32- - -30- - -11 or PSM 1- - -82- - -2 TASK 32- - -31- - -11- - -400- - -801).
(4) Repeat steps (1) thru (3) for the retraction actuator located on the opposite main landing gear.
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 component serial numbers if applicable. Enter this ModSum number only after complete and functional incorporation of all work defined in this service bulletin.
Jan 2009
SERVICE BULLETIN (SB) - - - RECORD OF INCORPORATION
- - - Q SERIES DASH 8 AIRCRAFT To : CMDB Focal 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
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