# Diamond Aircraft Mandatory Service Bulletin 42NG-059: Revision 2 - Rights: © Diamond Aircraft. Filed by the FAA in regulations.gov docket FAA-2016-9318, the docket of AD 2016-22-06. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Diamond Aircraft Mandatory Service Bulletin 42NG-059](https://openairdocs.org/service-documents/diamond/42ng-059.md) - Title as filed: SB42NG-059-M-2-inspection-of-autopilot-bridle-cable-clamps - Pages: 9 - PDF: https://openairdocs.org/files/sha256/79/32/793258f85ccdecc03b32a5b494d5bae5de64fbefb937e617eb6c540ea6423c59 - Page: https://openairdocs.org/service-documents/diamond/42ng-059/file/793258f85ccd ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42NG-059/2 Page 1 of 4 9-Sep-2016 MANDATORY SERVICE BULLETIN MSB 42NG-059/2 SUPERSEDES RSB 42NG-059/1 I TECHNICAL DETAILS I.1 Category Mandatory. I.2 Airplanes affected Type: DA 42 NG, DA 42 M-NG Serial numbers – range 1: 42.N150 through 42.N183 42.N185 through 42.N199 42.MN035 through 42.MN037, 42.MN039 42.MN050 through 42.MN052 Serial numbers – range 2: 42.N184 42.N200 through 42.N223 42.MN038 42.MN040 I.3 Date of effectivity 09-Sep-2016 I.4 Time of Compliance Serial numbers – range 1: First inspection within 25 flight hours from the date of effectivity, but not later than 31-Dec-2016, and following inspection during every 200 hour inspection thereafter. If the autopilot is deactivated the time of compliance of the first inspection may be extended up to 200 flight hours. Serial numbers – range 2: Inspection during every 200 hour inspection thereafter. The terminating action for the following inspection during every 200 hour inspection is the replacement of the autopilot bridle cable clamps with the improved design P/N D41-2213-10-53_01 or higher (_02) and P/N D41-2213-10-54_01 or higher (_02). Note: Compliance with RSB 42NG-059 or R SB 42NG-059/1 constitutes compliance with the first inspection required by this MSB. ### Page 2 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42NG-059/2 Page 2 of 4 9-Sep-2016 I.5 Subject I.6 Inspection of autopilot bridle cable clamps. ATA-Code: 22-00 I.7 Reason Cracked autopilot bridle cable clamps (P/N D41-2213-10-53 and P/N D41-2213-10-54) in the pitch and roll control system due to possible over-torqueing have been discovered during inspection. Tests have shown that the cracked clamps still perform their function but for safety reason they have to be inspected. This Service Bulletin describes the inspection of the clamps on the potentially affected airplanes. I.8 Concurrent Documents None. I.9 Approval The technical content of this document has been approved under the authority of DOA ref. EASA.21J.052. I.10 Accomplishments / Instructions See WI-MSB 42NG-059, latest effective issue. I.11 Mass (Weight) and CG Not affected. II PLANNING INFORMATION II.1 Material and Availability See WI-MSB 42NG-059, latest effective issue. II.2 Special Tools None. II.3 Labour Effort Approx. 1 hours. II.4 Credit For all aircraft within warranty period. II.5 Reference Documents DA 42 NG Airplane Maintenance Manual, Doc. No. 7.02.15, latest effective issue. ### Page 3 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42NG-059/2 Page 3 of 4 9-Sep-2016 III REMARKS 1. All work must be done by a certified aircraft service station or a certified aircraft maintenance mechanic. 2. All work, particular that which is not especially described in this Service Bulletin, must be done in accordance with the referenced Maintenance Manual. 3. Completion of all work must be recorded in the log book. 4. If material and/or labor hours are subject to be credited through Diamond Aircraft Industries, the Service Bulletin must be done by an authorized Diamond Service Center within the time of compliance and the Warranty Application incl. Work Report must be sent not later than 30 days after completion of work. 5. In case of doubt contact Diamond Aircraft Industries GmbH. ### Page 4 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42NG-059/2 Page 4 of 4 9-Sep-2016 EXECUTION REPORT TO SERVICE BULLETIN MSB 42NG-059/2 AIRPLANE INFORMATION Airplane Serial Number _________________ Airplane Registration _________________ Airplane Operator _________________ Hours of operation of airplane _________________ No. of landings _________________ Hours of operation-engine LH _________________ RH _________________ Typical operation of airplane private, club, training, other ______________ __________________________________ Date, Name, Sign Please fax the completed form to Fax No. +43-2622-26700-1369 or e-mail to airworthiness@diamond-air.at ### Page 5 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42NG-059 Revision 2 Page 1 of 5 9-Sep-2016 WORK INSTRUCTION WI-MSB 42NG-059 I GENERAL INFORMATION I.1 Subject Inspection of autopilot bridle cable clamps. I.2 Reference Documents DA 42 NG Airplane Maintenance Manual, Doc. No. 7.02.15, latest effective issue. I.3 Remarks a) All work must be done by a certified aircraft service station or a certified aircraft maintenance mechanic. b) All work, in particular if not described in this work instruction, must be done in accordance with the referenced maintenance manual. c) For conversion factors between SI units and US/Imperial units refer to AMM Chapter 02. d) In case of doubt, contact Diamond Aircraft Industries GmbH. II DRAWINGS, SPECIAL TOOLS & MATERIALS II.1 Drawings None. II.2 Special Tools None. II.3 Material Quantity Part Number Description a.r. D41-2213-10-53_01 Bridle cable clamp a.r. D41-2213-10-54_01 Bridle cable clamp 16 DIN 985-M5-A2 Hexagon nut, self locking Material is available from Diamond Aircraft Industries. ### Page 6 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42NG-059 Revision 2 Page 2 of 5 9-Sep-2016 III INSTRUCTIONS III.1 Deactivation of Autopilot (optional) Note: The deactivation of the autopilot may be carried out by the operator. Note: The electric pitch trim is inoperative when the auto pilot is deactivated. 1 Pull the autopilot circuit breaker. 2 Secure the autopilot circuit breaker with a cable tie. 3 Mark the autopilot as inoperative. III.2 Initial Inspection of Au topilot Bridle Cable Clamps 1 Remove the rear seat bench i.a.w. AMM Section 25-10. 2 Remove the rear baggage compartment i.a.w. AMM Section 25-10. ### Page 7 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42NG-059 Revision 2 Page 3 of 5 9-Sep-2016 3 Examine the clamps of the bridle cables for the pitch and roll servo:  Carefully inspect the clamps with a bright light and a mirror for signs of cracks or damage. Use a magnifying glass, if necessary.  Inspect the upper and lower boltings for loose parts and damage.  Re-torque the bolts. o Mark the clamp position with witness paint or equivalent to allow confirmation that the clamp did not move while re-torqueing o Loosen one bolt at each time and tighten with 3.6 Nm (2.65 lb ft).  Use a new self-locking nut.  Start with the lower bolts. Make sure the lower surfaces touch. o Proceed with the remaining bolts. o Confirm that the clamp did not move. Look especially in the marked areas for cracks. CAUTION: Use a torque wrench with an appropriate torque range. Apply the given torque carefully and do not overtorque the bolts as over-torqueing the bolts might damage the autopilot cable clamps. 4 If a clamp has to be replaced:  Replace the affected clamp.  Adjust the bridle cable tension i.a.w. AMM Section 22-10.  Torque the bolts with 3.6 Nm (2.65 lb ft). CAUTION: Use a torque wrench with an appropriate torque range. Apply the given torque carefully and do not overtorque the bolts as over-torqueing the bolts might damage the autopilot cable clamps. 5 Install the rear baggage compartment i.a.w. AMM Section 25-10. 6 Install the rear seat bench i.a.w. AMM Section 25-10. 7 If the autopilot has been deactivated, reactivate the autopilot:  Remove the cable tie and push in the autopilot circuit breaker.  Remove the autopilot inoperative marking. 8 Clean working areas, check for foreign objects. ### Page 8 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42NG-059 Revision 2 Page 4 of 5 9-Sep-2016 9 Check all altered, replaced, repaired parts for proper function. 10 Test all systems in working area for function. 11 Make all necessary entries in the airplane logs. III.3 Inspection of Autopilot Bridle Ca ble Clamps during the 200 Hours Inspection 1 Remove the rear seat bench i.a.w. AMM Section 25-10. 2 Remove the rear baggage compartment i.a.w. AMM Section 25-10. 3 Examine the clamps of the bridle cables for the pitch and roll servo:  Carefully inspect the clamps with a bright light and a mirror for signs of cracks or damage. Use a magnifying glass, if necessary.  Inspect the upper and lower boltings for loose parts and damage. Look especially in the marked areas for cracks. Note: Do not re-torque the bolts during recurrent inspection. 4 If a clamp has to be replaced:  Replace the affected clamp.  Adjust the bridle cable tension i.a.w. AMM Section 22-10.  Torque the bolts with 3.6 Nm (2.65 lb ft). CAUTION: Use a torque wrench with an appropriate torque range. Apply the given torque carefully and do not overtorque the bolts as over-torqueing the bolts might damage the autopilot cable clamps. 5 Install the rear baggage compartment i.a.w. AMM Section 25-10. 6 Install the rear seat bench i.a.w. AMM Section 25-10. 7 Clean working areas, check for foreign objects. ### Page 9 Diamond Aircraft Industries GmbH N. A. Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42NG-059 Revision 2 Page 5 of 5 9-Sep-2016 8 Check all altered, replaced, repaired parts for proper function. 9 Test all systems in working area for function. 10 Make all necessary entries in the airplane logs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.