MANDATORY SERVICE BULLETIN MSB 42-136/1 MSB 42NG-078

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Diamond Aircraft Industries GmbH Nikolaus-August-Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42-136/1 DAI MSB 42NG-078 Page 1 of 3 24-Jan-2019 MANDATORY SERVICE BULLETIN MSB 42-136/1 MSB 42NG-078 SUPERSEDES MSB 42-136 I TECHNICAL DETAILS I.1 Category Mandatory. I.2 Airplanes affected Type: DA 42, DA 42 M DA 42 NG and DA 42 M-NG that were converted from DA 42 or DA 42 M Serial numbers: all serial numbers I.3 Date of effectivity 24-Jan-2019 I.4 Time of Compliance For NLG (nose landing gear) legs with - less than 1800 hours TSN (time since new) at the date of effectivity: before exceeding 2000 hours TSN and every 200 flight hours thereafter. - more than 1800 hours TSN at the date of effectivity: within 200 flight hours but not later than 31-Jan-2020 and every 200 flight hours thereafter. I.5 Subject Inspection of NLG actuator attachment lever. ATA-Code: 32-20 I.6 Reason Diamond Aircraft Industries has received one report of a failure of the NLG actuator attachment lever. After the failure, when retracting the landing gear, the NLG actuator, which was not connected to the NLG leg anymore, interacted with the rudder / NLG control rods in such a way, that the rudder was forced into left hand deflection. After lowering the landing gear the rudder regained full control. The investigation has shown that the actuator lever failed because a crack that had developed over a longer time period, was not identified during scheduled maintenance. In order to avoid further similar failures, this Service Bulletin prescribes inspection of the NLG actuator attachment lever. I.7 Concurrent Documents None. Diamond Aircraft Industries GmbH Nikolaus-August-Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42-136/1 DAI MSB 42NG-078 Page 2 of 3 24-Jan-2019 I.8 Approval The technical content of this document has been approved under the authority of DOA ref. EASA.21J.052. I.9 Accomplishments / Instructions See WI-MSB 42-136 / WI-MSB 42NG-078, latest effective issue. I.10 Mass (Weight) and CG Mass and Center of Gravity are not affected. II PLANNING INFORMATION II.1 Material and Availability See WI-MSB 42-136 / WI-MSB 42NG-078, latest effective issue. II.2 Special Tools None. II.3 Labour Effort Approx. 0.25 hours for inspection of the NLG actuator attachment lever. II.4 Credit None. II.5 Reference Documents DA 42 Airplane Maintenance Manual, Doc. No. 7.02.01, latest effective issue. DA 42 NG Airplane Maintenance Manual, Doc. No. 7.02.15, latest effective issue. 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. In case of doubt contact Diamond Aircraft Industries GmbH. Diamond Aircraft Industries GmbH Nikolaus-August-Otto-Straße 5 2700 Wiener Neustadt, Austria DAI MSB 42-136/1 DAI MSB 42NG-078 Page 3 of 3 24-Jan-2019 EXECUTION REPORT TO SERVICE BULLETIN MSB 42-136/1 MSB 42NG-078 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 ______________ Crack in NLG actuator attachment lever found: o no o yes __________________________________ Date, Name, Sign Please e-mail the completed form to executionreports@diamond-air.at Diamond Aircraft Industries GmbH Nikolaus-August-Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42-136 WI-MSB 42NG-078 Revision 1 Page 1 of 2 24-Jan-2019 WORK INSTRUCTION WI-MSB 42-136 WI-MSB 42NG-078 I GENERAL INFORMATION I.1 Subject Inspection of nose landing gear (NLG) actuator attachment lever. I.2 Reference Documents DA 42 Series Airplane Maintenance Manual, Doc. No. 7.02.01, latest effective issue. DA 42 NG Series 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. Diamond Aircraft Industries GmbH Nikolaus-August-Otto-Straße 5 2700 Wiener Neustadt, Austria WI-MSB 42-136 WI-MSB 42NG-078 Revision 1 Page 2 of 2 24-Jan-2019 III INSTRUCTIONS Note: For better illustration, the examination process of the NLG actuator attachment lever is shown on a NLG leg that was removed from the airplane. It is not necessary to remove the NLG leg from the aircraft for examination of the NLG actuator attachment lever. 1 Clean the NLG actuator attachment lever. 2 Examine the NLG leg actuator attachment lever for cracks and damage in the area as indicated in the pictures. 3 If cracks or damage are found, replace NLG leg with a new part in accordance with AMM, section 32-20. 4 Clean working areas, check for foreign objects. 5 Check all altered, replaced, repaired parts for proper function. 6 Test all systems in working area for function. 7 Make all necessary entries in the airplane logs.