Service Bulletin No. 32-17M Page 1 of 6 CAGE: K0654 Cheltenham Road, Glouces ter, GL2 9QH, England Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821 

# SERVICE BULLETIN Messier-Dowty Ltd



### © MESSIER-BUGATTI-DOWTY 2014 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts are granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third par ty without the express written consent of Messier-Bugatti-Dowty. Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. LANDING GEAR - NOSE LANDING GEAR - INSPECTION OF SLIDING TUBE
1. Planning Information A. Effectivity Aircraft affected: Shorts Skyvan - All Marks Unit Affected: Nose Landing Gear Part/Type Nos.: EH1833, EH1839 and EH1887 (Nose Landing Gear) which includes 200621619 and EH183345 (Sliding Tube) NOTE: This Service Bulletin is applicable to NLG Sliding Tubes installed on aircraft and held as spares. B. Concurrent Requirements (1) None. C. Reason (1) A fracture of a Nose Landing Gear Sliding Tube has occurred due to fatigue cracking. D. Description (1) Messier-Dowty Limited tells you that this Service Bulletin includes details to do a one off visual inspection and a one off fluoresce nt penetrant inspection (FPI) for cracking of the Nose Landing Gear Sliding Tube. E. Compliance (1) It is expected that the contents of this Service Bulletin will be made MANDATORY by an EASA Airworthiness Directive. (2) Messier-Dowty Limited recommends that y ou do the detailed visual inspection at or before 1 month from the issue date of this Service Bulletin. (3) Messier-Dowty Limited recommends that you do the fluorescent penetrant inspection (FPI) at or before 3 months from the issue date of this Service Bulletin. F. Approval (1) The technical content of this Service Bulletin has been approved under the authority of the EASA Design Organisation Approval No. EASA.21J.068.

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# SERVICE BULLETIN Messier-Dowty Ltd

G. Manpower (1) Messier-Dowty Limited make an estimate t hat it will take approximately 0.5 man-hours to do the detailed visual inspection and 4 man-hours to do the fluorescent penetrant inspection of this Service Bulletin. The elap sed time will be 0.5 hours for the detailed visual inspection and 4 hours for t he fluorescent penetrant inspection. NOTE: It is assumed that the equipment has been placed in a maintenance state. The man-hour estimates do not include preparation, close out or administrative functions. H. Weight and Balance (1) None. I. References (1) Messier-Dowty Limited Component Maintenance Manual, 32-20-77. (2) Messier-Dowty Standard Practices Manual, 20-00-10. (3) Skyvan Maintenance Manual. (4) Shorts Service Bulletin 32-74. J. Other Publications Affected (1) None.
2. Material Information A. Material - Price and Availability (1) None. B. Material Necessary for Each Unit (1) Refer to Appendix A. 3. Accomplishment Instructions A. Procedure for detailed visual inspection of the external diameter of the Sliding Tube: (1) Make sure the aircraft is in a safe condition: refer to the Skyvan Maintenance Manual. (2) If necessary to view the area of inspection on the Sliding Tube outside diameter (refer to Figure 1 ) raise the aircraft nose (to extend the Sliding Tube) using a suitable jack: refer to the Skyvan Maintenance Manual (Chapter 7, Para 2). (3) Fully clean the area of inspection on the Sliding Tube outside diameter, remove all grease and dirt: refer to CLEANING in CMM 32-20-77. (4) Perform a detailed visual inspection under 10 x magnification for cracking of the Sliding Tube outside diameter in the area of inspection shown in Figure 1

. (5) Report any inspection findings to MBD CSC (e-mail to: pse.glostec@safranmbd.com and aogcsc@safranmbd.com ) and wait to receive instruction before next flight. (6) If necessary, lower the aircraft and remove the jacks: refer to the Skyvan Maintenance Manual. B. Procedure for fluorescent penetrant inspection of the external diameter of the Sliding Tube: (1) Make sure the aircraft is in a safe condition: refer to the Skyvan Maintenance Manual.

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# SERVICE BULLETIN Messier-Dowty Ltd

(2) If necessary to view the area of inspecti on on the Sliding Tube outside diameter (refer to Figure 1 ) raise the aircraft nose (to extend the Sliding Tube) using a suitable jack: refer to the Skyvan Maintenance Manual (Chapter 7, Para 2). (3) Fully clean the area of inspection on the Sliding Tube outside diameter, remove all grease and dirt: refer to CLEANING in CMM 32-20-77. (4) Perform the fluorescent penetrant inspec tion procedure in Appendix A for cracking of the Sliding Tube outside diameter in the area of inspection shown in Figure 1

. (5) Report any inspection findings to MBD CSC (e-mail to: pse.glostec@safranmbd.com and aogcsc@safranmbd.com ) and wait to receive instruction before next flight. (6) If necessary, lower the aircraft and remove the jacks: refer to the Skyvan Maintenance Manual. C. Identification (1) After you have done the detailed visual inspection and the fluorescent penetrant inspection of this Service Bulletin:- writ e Service Bulletin number 32-17M in the applicable aircraft and nose landing gear records. (2) After you have done the detailed visual inspection and the fluorescent penetrant inspection of this Service Bulletin: complete the Proforma (Appendix B) and send it to pse.glostec@safranmbd.com.

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# SERVICE BULLETIN Messier-Dowty Ltd

Area of Inspection Figure 1 SKYVA7442-1 FORK SUB-ASSEMBLY (1-140A or 1-145A) LOCK WASHER (1-125)

WASHER (1-115) BOLT (1-110) LOCKING PLATE (1-120) BLEEDER SCREW

STEERING TUBE

SLIDING TUBE GREASE

NIPPLE

INFLATION VALVE

CASTORING STOP STEERING BRACKET

AIRCRAFT ATTACHMENT BRACKET

TOGGLE SUB-ASSEMBLY

INFLATION VALVE INSPECTION AREA ENLARGED VIEW OF INSPECTION AREA [APPLICABLE AFTER SB 32-2M ( AS SHOWN) AND BEFORE SB 32-2M]

PERFORM THE DETAILED VISUAL INSPECTION AND FLUORESCENT PENETRANT INSPECTION IN THE SHADED AREA ALL AROUND SLIDING TUBE CIRCUMFERENCE

25mm (1in)

PAINTED AREA DO NOT INSPECT 100mm (4in)

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# SERVICE BULLETIN Messier-Dowty Ltd

4. Messier-Bugatti-Dowty and Me ssier Services Contacts A. Refer to the Messier-Bugatti-Dowty website ( safranmbd.com ) for the latest list of contact names, addresses and numbers. Original Equipment Manufacturers Messier-Dowty Inc. 574 Monarch Avenue Ajax, Ontario L1S 2G8 CANADA Tel : 905-683-3100 Fax : 905-683-6936 Messier-Dowty Limited Cheltenham Road Gloucester GL2 9QH ENGLAND Tel : +44(0)1452 712424 Fax : +44(0)1452 713821 Messier-Bugatti-Dowty Landing Gear & Systems Integration Division Inovel Parc Sud BP 10 78140 Velizy - Villacoublay FRANCE Tel : +33 146 29 18 00 Fax : +33 146 29 87 70

Customer Support Centers (CSC) For AOG (commercial and technical): aogcsc@safranmbd.com

For Europe - Africa - Middle East customers: eamecsc@safranmbd.com Tel: +33 1 5521 2590

For Americas customers: americacsc@safranmbd.com Tel: +1 404 305 2626

For Asia-Pacific customers: asiacsc@safranmbd.com Tel: +65 6245 5688

Repair and Overhaul Facilities Messier Services R&O Facility 574 Monarch Avenue Ajax, Ontario L1S 2G8 CANADA Tel : 905-683-3100 Fax : 905-683-0378 Messier Services R&O Facility Meteor Business Park Cheltenham Road Gloucester GL2 9QL ENGLAND Tel : +44(0)1452 713111 Fax : +44(0)1452 716500 Messier Services R&O Facility 3, rue Antoine de St Exupery, BP110 67124 Molsheim Cedex France Tel : (33) 38838 9200 Fax : (33) 38838 9399

Messier Services (Asia) Pte. Ltd. R&O Facility 21 Loyang Crescent, Loyang Industrial Estate SINGAPORE 508985 Tel : (65) 6545 9455 Fax : (65) 6542 3936 Messier Services R&O Facility - Americas Av. La Noria Parque Industrial Querétaro Carretera QRO-SLP, Km. 28.5 Querétaro, QRO 76220 MEXICO Tel : +52 (442) 19 25 800 Fax :+52 (442) 19 25 801 HYDREP Aéroport de Dinard-Pleurtuit-Saint-Malo Bâtiment 20 BP90154 35801 DINARD Cedex FRANCE Tel : (33) 2 99 82 79 79 Fax : (33) 2 99 82 79 97

Nov 1/2014INTENTIONALLY BLANK

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# SERVICE BULLETIN Messier-Dowty LtdService Bulletin No. 32-17M Page 1 of 2 CAGE: K0654 Cheltenham Road, Glouces ter, GL2 9QH, England Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821 

# SERVICE BULLETIN Messier-Dowty Ltd



### © MESSIER-BUGATTI-DOWTY 2014 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts are granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third par ty without the express written consent of Messier-Bugatti-Dowty. Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. APPENDIX - A ON-WING NDT (FPI) PROCEDURE FOR NOSE LANDING GEAR SLIDING TUBE
1. INTRODUCTION A. This procedure shall only be carried out by level 2 personnel qualified and certificated in accordance with EN 4179/NAS410 (or equivalent) in the Penetrant Testing method.
2. EQUIPMENT A. A supply of cold degreasing fluid (e.g. Methelated Spirit, Acetone or similar). B. A supply of lint free cloths and paper towels. C. All penetrant materials shall be qualified to QPL AMS 2644. D. Type 1 Fluorescent Penetrant, Level 3 sensitivity (mln), Solvent Removable. [Refer to ASTME1417 for classifications] E. Method C solvent remover -Class 2 (non-halogenated). F. Developer: form d. (Non aqueous wet). G. UV-A inspection lamp with a mini mum u/v intensity of 1,000 micro W/cm 2 at the inspection surface. H. A black out cover to aid ultraviolet inspection. NOTE: The inspection must be carried out in a safe, clean, darkened, well-ventilated area suitable for ultraviolet inspection. 3. PROCEDURE
WARNING: THE VAPOURS FROM THE EVAPORATING, VOLATILE SOLVENT DEVELOPER CARRIER MAY BE HAZARDOUS. PROPER VENTILATION SHOULD BE PROVIDED IN ALL CASES BUT ESPECIALLY WHEN THE SURFACE TO BE EXAMINED IS INSIDE A CLOSED VOLUME. ENSURE GLOVES, SAFETY GLASSES AND PROTECTIVE CLOTHING ARE USED AND OBSERVE ALL NECESSARY SITE SAFETY PRECAUTIONS. A. Thoroughly clean the area to be examined with a lint free cloth and cold degreasing fluid. Make sure that no cleaning fluid stays in surrounding pockets or comes into contact with electrical items, gaskets, seals etc. Allow to dry. B. Apply the penetrant to the area to be examined by brushing, spray or swabbing. Minimum contact time shall be 60 minutes. Maximum cont act time shall be 120 minutes. However, make sure penetrant remains wet during the complete contact time.

APPENDIX - A

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# SERVICE BULLETIN Messier-Dowty Ltd

C. Initially remove the excess penetrant with lint free cloths or paper towels, and then remove the remainder of the surface penetrant residues with solvent lightly-moistened lint free cloths or paper towels. NOTE: Do not flush the area with solvent or saturate the lint free cloths or paper towels used to remove excess penetrant. D. Make sure the surface is completely dry and apply the non-aqueous wet developer, ensuring a uniform thin coating is applied to the entire surface to be examined. NOTE: Heavy or thick coatings of developer may mask small indications. Inspect the area immediately, to help identify developing indications, and again after the minimum development time. The minimum development time shall be 10 minutes. The maximum development time shall be 60 minutes. E. Use the black out cover as necessary to r educe the white light level and inspect using the UV-A inspection light. Allow a dark adaptation time of at least 2 minutes prior to inspection. Identify and report all relevant indications. F. Post clean to remove all traces of developer and penetrant materials from the examined
area.

APPENDIX - A

Nov 1/2014Service Bulletin No. 32-17M Page 1 of 2 CAGE: K0654 Cheltenham Road, Glouces ter, GL2 9QH, England Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821 

# SERVICE BULLETIN Messier-Dowty Ltd



### © MESSIER-BUGATTI-DOWTY 2014 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts are granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third par ty without the express written consent of Messier-Bugatti-Dowty. Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. APPENDIX - B INSPECTION RESULTS PROFORMA FOR SB 32-17M
NOTE: Fill this profroma for every inspected Sliding Tube and send this form to pse.glostec@safranmbd.com

. AIRCRAFT SERIAL NO.: (IF APPLICABLE)

TOTAL AIRFRAME HOURS AND CYCLES:

OPERATOR NAME AND CONTACT DETAILS:

NOSE LANDING GEAR DETAILS: P/N
S/N
CSN
TSN
CSO
TSO

SLIDING TUBE DETAILS: P/N
S/N
CSN
TSN
CSO
TSO

APPENDIX - B

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# SERVICE BULLETIN Messier-Dowty Ltd

DATE OF DETAILED VISUAL INSPECTION (dd/mm/yy):

FINDING OF DETAILED VISUAL INSPECTION: (If there are no adverse findings, this should be stated. If there are adverse findings, please include the details of dimensions and exact locations also attach photographic evidence.)

DATE OF FLUORESCENT PENETRANT INSPECTION (dd/mm/yy):

FINDING OF FLUORESCENT PENETRANT INSPECTION: (If there are no adverse findings, this should be stated. If there are adverse findings, please include the details of dimensions and exact locations also attach photographic evidence.)

Nov 1/2014