{"id":"F2008L01928","name":"AD/DA42/5 - Aileron Bellcrank and Rod Ends","slug":"ad-da42-5-aileron-bellcrank-and-rod-ends","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74155,"registerId":"commonwealth-F2008L01928-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Diamond DA42 Series Aeroplanes","sectionType":"division","heading":"Diamond DA42 Series Aeroplanes","content":"### Diamond DA42 Series Aeroplanes\n\n| AD/DA42/5 | Aileron Bellcrank and Rod Ends | 7/2008 |\n| --------- | ------------------------------ | ------ |\n\n| Applicability: | Diamond Aircraft Industries GmbH DA 42 and DA 42 M aircraft, fitted with aileron bellcranks Part Number (P/N) DA4-2717-50-00.Note 1: The following DA 42 and DA 42 M aircraft are known to have been delivered with P/N DA4-2717-50-00 Bellcrank and bent P/N DAI-9027-00-01 rod ends installed: Serial numbers 42.008 through 42.285, 42.287, 42.289 through 42.291, 42.295, 42.297, 42.301, 42.302, 42.306 through 42.308; and 42.AC001 through 42.AC110, inclusive.                                                                                                           |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Replace the P/N DA4-2717-50-00 aileron bellcrank with the improved design P/N DA4-2717-50-00_01 aileron bellcrank and replace any bent rod endsP/N DAI-9027-00-01 with straight parts, in accordance with Diamond Aircraft Industries GmbH Mandatory Service Bulletin (MSB) 42-043or later NAA approved revision.2. Do not install a P/N DA4-2717-50-00 aileron bellcrank or bent rod endsP/N DAI-9027-00-01 on any aircraft as replacement parts.Note 2: EASA AD 2008-0086 dated 13 May 2008 refers.                                                                         |\n| Compliance:    | For Requirement 1: Within the next 200 flight hours after the effective date of this AD unless previously accomplished.For Requirement 2: From the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 3 July 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background:    | The original designed bellcrank for the aileron control system in the wing needed to be installed with slightly bent rod ends during production of the aircraft to avoid friction and possible chafing. In addition to being a non-preferable production practice, this creates the risk of replacement parts being installed during subsequent in-service maintenance without being bent or not being bent correctly. This condition, if not detected and corrected, could lead to chafing damage of the aileron control system and consequent loss of control of the aircraft. |\n\n|     | Diamond Aircraft Industries GmbH has now developed a new aileron bellcrank that allows for additional angular movement of the push rod, thereby eliminating the chafing risk without using bent rod ends. This AD requires the replacement of the aileron bellcrank with an improved part and the replacement of any bent rod endsP/N DAI-9027-00-01. In addition, this AD prohibits the reinstallation of P/NDA4-2717-50-00 aileron bellcranks and bent rod ends P/N DAI-9027-00-01 as replacement in the future. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n22 May 2008","sortOrder":0},{"sectionNumber":"AD/DA42/5","sectionType":"part","heading":"AD/DA42/5","content":"## AD/DA42/5","sortOrder":1},{"sectionNumber":"Aileron Bellcrank and Rod Ends","sectionType":"part","heading":"Aileron Bellcrank and Rod Ends","content":"## Aileron Bellcrank and Rod Ends","sortOrder":2},{"sectionNumber":"7/2008","sectionType":"part","heading":"7/2008","content":"## 7/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD remains tightly focused on its original safety purpose: correcting a specific manufacturing defect in aileron control systems. No scope creep detected."},"complexity_factors":["Single, specific mechanical issue addressed","Only 2 requirements: replace parts and prohibit future use","Clear applicability table with specific serial numbers","Simple compliance timeline (200 flight hours)","No nested definitions or cross-referenced legislation","Background explanation provided in plain language"],"plain_english_summary":"This AD requires owners/operators of specified Diamond DA42 serial numbers to replace a faulty aileron bellcrank (P/N DA4-2717-50-00) with an improved design and replace any bent connecting rods with straight ones, and prohibits reinstalling the old parts. It addresses chafing caused by factory-bent rods that can lead to control-system wear and potential loss of aircraft control. Compliance: within 200 flight hours after 3 July 2008."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive confines action to specified DA42/DA42 M aircraft and named part numbers and requires replacement plus a ban on future use of the old parts. This aligns with the stated original safety objective (eliminating chafing risk) and does not broaden applicability beyond the listed parts/serials; it does add an ongoing prohibition on reinstalling the legacy parts."},"complexity_factors":["Precise technical targeting: specific part numbers (DA4-2717-50-00, DA4-2717-50-00_01, DAI-9027-00-01) drive the required action.","Fleet identification: detailed serial-number ranges listed which operators must check to confirm applicability.","External-document dependency: compliance requires following Diamond MSB 42-043 or a later NAA‑approved revision (cross-references another instrument).","Short compliance window: replacement required within 200 flight hours, creating scheduling pressure for operators.","Prohibition element: a continuing ban on reinstalling the original bellcrank and bent rod ends imposes ongoing procurement/maintenance constraints.","Compliance judgment: determining whether a rod end is 'bent' may require inspection expertise, adding inspection burden.","Operational impacts: parts availability and maintenance time/costs fall on owners/operators and affect aircraft availability."],"plain_english_summary":"Requires operators of specific Diamond DA42/DA42 M aeroplanes fitted with aileron bellcrank P/N DA4-2717-50-00 to replace it with the redesigned P/N DA4-2717-50-00_01 and to replace any bent rod ends P/N DAI-9027-00-01 with straight parts; it also prohibits reinstalling the old parts. CASA mandates compliance per Diamond MSB 42-043 (or later NAA-approved revision) within 200 flight hours; owners/operators pay for and schedule the work to remove the chafing risk that could cause loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends","history":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends/history","analysis":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends/analysis","conflicts":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends/conflicts","importantCases":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends/important-cases","documents":"/api/acts/ad-da42-5-aileron-bellcrank-and-rod-ends/documents"}}