{"id":"F2007L01160","name":"AD/Z-242L/6 - Airworthiness Limitations - Permissible Aerobatic Manoeuvres","slug":"ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65220,"registerId":"commonwealth-F2007L01160-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Moravan Zlin Z-242L Series Aeroplanes","sectionType":"division","heading":"Moravan Zlin Z-242L Series Aeroplanes","content":"### Moravan Zlin Z-242L Series Aeroplanes\n\n| AD/Z-242L/6 | Airworthiness Limitations - Permissible Aerobatic Manoeuvres | 6/2007 TX |\n| ----------- | ------------------------------------------------------------ | --------- |\n\n| Applicability: | Model Z 242L aircraft, serial numbers 0490, 0541, and 0651 through 0659.                                                                                                                                                                                                                                                                                                   |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Modify the Aircraft Flight Manual (AFM) in accordance with MORAVAN Mandatory Service Bulletin Z 242L/49a original issue, or later EASA approved revision.Note: EASA AD 2007-0110-E refers.                                                                                                                                                                                 |\n| Compliance:    | Before further flight after 25 April 2007.                                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 25 April 2007.                                                                                                                                                                                                                                                                                                           |\n| Background:    | The installation of G-load monitoring units on some Model Z 42 series aircraft has revealed that during aerobatic manoeuvres, some aircraft exceeded the limit loads initially defined for certification. As a consequence, to restore the safety margins of aircraft operated in utility category the AFM shall be modified in order to limit the permissible manoeuvres. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2007","sortOrder":0},{"sectionNumber":"AD/Z-242L/6","sectionType":"part","heading":"AD/Z-242L/6","content":"## AD/Z-242L/6","sortOrder":1},{"sectionNumber":"Airworthiness Limitations - Permissible ","sectionType":"part","heading":"Airworthiness Limitations - Permissible Aerobatic Manoeuvres","content":"## Airworthiness Limitations - Permissible Aerobatic Manoeuvres","sortOrder":2},{"sectionNumber":"6/2007 TX","sectionType":"part","heading":"6/2007 TX","content":"## 6/2007 TX","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific airworthiness concern discovered through operational monitoring. It has not expanded beyond its original purpose of restricting aerobatic manoeuvres for structural safety reasons."},"complexity_factors":["Extremely narrow scope — applies to only 11 specific aircraft by serial number","Single, straightforward compliance requirement (modify AFM per manufacturer bulletin)","No defined terms section, no cross-references to other legislation beyond a single note referencing the European equivalent (EASA AD 2007-0110-E)","Clear, absolute deadline (before further flight after 25 April 2007)","No conditional logic, exceptions, or nested provisions","Total length is approximately 200 words of substantive content"],"plain_english_summary":"This Airworthiness Directive requires operators of specific Moravan Zlin Z-242L aircraft (listed serial numbers) to revise the Aircraft Flight Manual per the manufacturer’s instructions to restrict certain aerobatic manoeuvres. \n\nIt responds to G-load monitoring that showed structural loads during aerobatics could exceed certified limits; the AFM changes limit high-stress manoeuvres to prevent possible structural failure and must be implemented before the next flight after 25 April 2007."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD does not materially change scope beyond the instrument’s stated original purpose. It is narrowly targeted to a limited set of serial numbers and requires an AFM amendment to limit aerobatic manoeuvres in response to observed G‑load exceedances — that is the same corrective scope described in the background. The only delegation that could alter future scope is the clause permitting a later EASA‑approved revision of the referenced service bulletin; that allows future technical detail to be changed by EASA approval rather than by reissuing the AD itself, but the current AD does not, on its face, expand the set of aircraft affected or impose structural modifications beyond the AFM amendment."},"complexity_factors":["Short instrument with a single mandatory action (modify AFM)","Narrow applicability (only 10 specific serial numbers listed)","Immediate compliance deadline (before further flight after a fixed date)","Cross-reference to external documents (MORAVAN Mandatory Service Bulletin Z 242L/49a and any later EASA‑approved revision)","Reference to an external regulator document (EASA AD 2007-0110-E) rather than including technical detail in the AD","No detailed definitions, conditions, or multiple exceptions in the AD (limited internal cross‑referencing)"],"plain_english_summary":"**What this instrument changes (mechanical effect)**\n\n- It requires that the Aircraft Flight Manual (AFM) for certain Moravan Zlin Z-242L aeroplanes be amended in line with MORAVAN Mandatory Service Bulletin Z 242L/49a (original issue) or any later revision approved by EASA (European Aviation Safety Agency). This is the single mandatory action the directive imposes.\n\n- It applies only to Model Z 242L aircraft with serial numbers 0490, 0541, and 0651–0659.\n\n- The change had to be made before the next flight after 25 April 2007; the directive became effective on 25 April 2007.\n\n**Why the regulator says it is needed (stated purpose)**\n\n- The background given is that G‑load monitoring units installed on some Z 42 series aircraft showed that during aerobatic manoeuvres some aircraft experienced loads above the certification limit loads. The stated purpose of the AFM amendment is to restore safety margins for aircraft operated in the utility category by limiting the permissible aerobatic manoeuvres.\n\n**Who it affects and who pays**\n\n- Directly affected: owners and operators of the specific serial‑numbered Z 242L aeroplanes identified above. Pilots who operate those specific aircraft are also affected because their permitted in‑flight manoeuvres will be constrained by the AFM change.\n\n- Who pays: the operator/owner bears the cost of implementing the change. Mechanically, the immediate cost is administrative (updating AFM documentation and distributing it) and operational (ensuring pilots are briefed and follow the new limits). If the AFM amendment requires additional training, placarding, or operational changes, those add time and money for the owner/operator.\n\n**What behaviour must change**\n\n- Pilots must comply with the revised AFM limitations and therefore must not perform the aerobatic manoeuvres that the amended AFM prohibits or restricts. Operators must ensure the AFM used in the aircraft matches the mandated wording from the service bulletin (or later EASA‑approved revision). The directive does not mandate structural modification of the airframe — it modifies operational limits via the AFM.\n\n**Trade‑offs, costs and implementation details**\n\n- Administrative/compliance cost: low to moderate. Updating an AFM and briefing pilots is straightforward but does require a documented change and potentially retraining.\n\n- Operational cost: concentrated on owners/operators who rely on aerobatic capability (e.g., aerobatic schools, display pilots, or private owners who perform aerobatics). Those operators face loss of capability (and possibly income) if particular manoeuvres are restricted.\n\n- Options for operators: the AD requires the AFM change; absent further action operators can either cease the prohibited manoeuvres or pursue an alternative means of compliance (not specified in the AD text). The AD permits use of “later EASA approved revision” of the service bulletin, which delegates future detail to EASA‑approved documents.\n\n- Implementation risk: the AD cross‑references an external manufacturer service bulletin and EASA approval. That is efficient but means the exact prohibited manoeuvres and technical detail are contained outside the AD itself. Enforcement relies on operators keeping the AFM current and on the regulator checking compliance.\n\n**Concrete mechanism and decision‑maker**\n\n- Decision‑maker: the Civil Aviation Safety Authority (CASA), acting through its delegate, issued the AD and enforces compliance (the instrument itself names the CASA delegate as issuer). EASA’s role is limited to approving any later revisions of the referenced service bulletin.\n\n- Mechanism: CASA’s AD mandates the AFM amendment by reference to a manufacturer service bulletin or any later EASA‑approved revision. The AFM (a document that pilots must carry/use) is the control point that changes pilot behaviour.\n\n"}},"importantCases":[],"_links":{"self":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres","history":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres/history","analysis":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres/analysis","conflicts":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres/conflicts","importantCases":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres/important-cases","documents":"/api/acts/ad-z-242l-6-airworthiness-limitations-permissible-aerobatic-manoeuvres/documents"}}