{"id":"F2007L02420","name":"AD/Z-242L/3 Amdt 2 - Airworthiness and Operating Limitations","slug":"ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67846,"registerId":"commonwealth-F2007L02420-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/3 Amdt 2 | Airworthiness and Operating Limitations | 10/2007 DM |\n| ------------------ | --------------------------------------- | ---------- |\n\n| Applicability: | Model Z 242L aircraft, all serial numbers, without the wing reinforcement modification incorporated. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. For aircraft that have accumulated more than 190 flight hours in Aerobatic plus Utility category:a. Modify the Aircraft Flight Manual (AFM) to introduce prohibition of operations under the Aerobatic and Utility categories and to introduce the pre-flight inspection of the upper wing bolts of the airframe/wing attachment in accordance with paragraph 4.4 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.b. Install a placard in the cockpit in full view of the pilot, without risk of being inadvertently removed or hidden, to introduce the following information:AEROBATIC & UTILITY FLIGHTS PROHIBITEDNote 1: Inserting a copy of this Directive into the AFM is considered as acceptable compliance with Requirement 1.a. of this Directive.c. Accomplish the requirements of paragraph 4.2 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.After compliance with Requirement 1.c. of this Directive, Normal category flights may be resumed and continued until the aircraft service life of 3,600 flight hours is reached.d. Accomplish the requirements of paragraph 4.3 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.2. For aircraft that have accumulated 190 flight hours or less in Aerobatic plus Utility category: |\n\n| | a. Modify the AFM to introduce prohibition of operations under the Aerobatic category and to introduce the pre-flight inspection of the upper wing bolts of the airframe/wing attachment in accordance with paragraph 4.4 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.b. Install a placard in the cockpit in full view of the pilot, without risk of being inadvertently removed or hidden, to introduce the following information:AEROBATIC FLIGHTS PROHIBITEDNote 2: Inserting a copy of this Directive into the AFM is considered as acceptable compliance with Requirement 2.a. of this Directive.c. Replace the placard installed as required by Requirement 2.b. of this Directive with another one, in full view of the pilot, without risk of being inadvertently removed or hidden, to introduce the following information:AEROBATIC & UTILITY FLIGHTS PROHIBITEDd. Accomplish the requirements of paragraph 4.3 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.After compliance with Requirements 2.c. and 2.d. of this Directive, Normal category flights may be resumed and continued until the aircraft service life of 3,600 flight hours is reached.3. For all affected aircraft:Update the approved Operator’s Maintenance Program by inserting the new requirements introduced in paragraphs 4.3 and 4.4 of Moravan Mandatory Service Bulletin Z 242L/51a original issue, or later EASA approved revision.Note 3: EASA Emergency AD 2007-0200-E refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | For Requirements 1.a., 1.b. and 1.c: Before further flight.For Requirement 1.d: At the next “B” check, “C” check, or “Overhaul” check, whichever occurs first after 2 August 2007.For Requirements 2.a. and 2.b: Before further flight.For Requirement 2.c: Upon accumulating 190 flight hours in Aerobatic plus Utility category.For Requirement 2.d: At the next “C” check or “Overhaul” check, whichever occurs first after 2 August 2007. |\n\n| | For Requirement 3: Within 60 days after 2 August 2007. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | This Amendment becomes effective on 2 August 2007. |\n| Background: | The Czech CAA received a report of a wing failure on a Model Z-142 aircraft. As a result, a restriction was placed on aerobatic and spinning manoeuvres until a NDI inspection of the wing spar attachment fittings was accomplished.The Czech CAA also required certain limitations due to the detection of aircraft operating at variance with conditions on which the technical service life of the airframe is based. These limitations were reflected in AD/Z-242L/4.Amendment 1 was issued in response to a revision of the related Czech AD and a revision of an FAA AD which required replacement of the wings after a certain operational time. The initial issue of the FAA AD resulted from mandatory continuing airworthiness information issued by the Czech CAA. The restrictions only took account for the aerobatic load spectrum and did not account for the aerobatic frequency. The restrictions also addressed the life limit of the wings when they should have addressed the life limit of the entire airframe (life limit of the aircraft). Although the aerobatic frequency extended the operational times, it more importantly ensured that all aircraft (even those that have not reached the operational limits) are not subject to fatigue cracking caused by exceeding the aerobatic frequency. This Directive required operational restrictions and incorporated the aerobatic frequency; and life limited the aircraft rather than just the wings.Amendment 2 is issued in response to a new EASA AD, which was prompted by further investigation that has determined the need to prohibit operations under the Aerobatic category for Zlin Z 42 series aircraft with non-reinforced wings, and the need to replace some airframe/wing attachment parts to maintain airworthiness of these aircraft in the long term.This Directive prohibits Aerobatic category flights for Zlin Z 42 series aircraft with non-reinforced wings, restricts certain aircraft to Normal category operations, limits to 190 flight hours the time that can be flown under Aerobatic and Utility categories, and introduces new life limits and new inspection requirements to be inserted into the operator’s maintenance programmes. |\n\n| | The original issue of this Airworthiness Directive became effective on 15 September 1999. |\n| --- | ----------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n1 August 2007","sortOrder":0},{"sectionNumber":"AD/Z-242L/3 Amdt 2","sectionType":"part","heading":"AD/Z-242L/3 Amdt 2","content":"## AD/Z-242L/3 Amdt 2","sortOrder":1},{"sectionNumber":"Airworthiness and Operating Limitations","sectionType":"part","heading":"Airworthiness and Operating Limitations","content":"## Airworthiness and Operating Limitations","sortOrder":2},{"sectionNumber":"10/2007 DM","sectionType":"part","heading":"10/2007 DM","content":"## 10/2007 DM","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"},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Yes. The Amendment expands scope beyond addressing a wing spar attachment fitting to: (a) prohibit Aerobatic category flights for non‑reinforced Zlin Z 42 series aircraft, (b) limit the cumulative Aerobatic + Utility flight hours to 190 before further restrictions, and (c) impose a life limit on the entire airframe (3,600 flight hours) rather than only limiting the wings. The original AD and earlier amendments focused on wing inspection/replacement; Amendment 2 broadens the operational restrictions, adds staged placarding and AFM changes, and requires changes to the operator’s maintenance program to maintain long‑term airworthiness."},"complexity_factors":["Conditional requirements split by accumulated aerobatic+utility flight hours (>190 hrs versus ≤190 hrs)","Multiple immediate and deferred compliance deadlines (\"before further flight\", \"next B/C/C/Overhaul check\", \"within 60 days\")","References to an external document: Moravan Mandatory Service Bulletin Z 242L/51a (paragraphs 4.2, 4.3, 4.4) and any later EASA‑approved revisions","Different placard texts and staged placard replacement tied to an operational hours threshold (190 hrs)","Cross‑references to various maintenance checks (B, C, Overhaul) with differing triggers","Life‑limit introduced for the entire airframe (3,600 flight hours) in addition to operational hour counters for aerobatic+utility","Exclusion for aircraft with wing reinforcement modification (narrow applicability)","Notes that inserting the Directive into the AFM is acceptable compliance (administrative alternative)","Dependence on regulator acceptance of later Service Bulletin revisions, creating an external dependency and potential variability in implementation"],"plain_english_summary":"**What this directive does (mechanics)**\n\n- Applies to: Moravan Zlin Z-242L aeroplanes, all serial numbers, that do NOT have the wing reinforcement modification fitted (see “Applicability”).\n\n- It requires owners/operators to do three types of things (see Requirements 1–3):\n - Change the Aircraft Flight Manual (AFM) and install cockpit placards that prohibit aerobatic flights (and, for some aircraft, also prohibit utility flights) until certain inspections or parts replacements are done (Requirements 1.a–1.c; 2.a–2.d).\n - Carry out inspections and replacement work described in the manufacturer’s Mandatory Service Bulletin Z 242L/51a (paragraphs 4.2, 4.3 and 4.4 of the Service Bulletin), or later EASA‑approved revisions of that Service Bulletin (Requirements 1.c, 1.d, 2.d, 3).\n - Update the operator’s approved Maintenance Program to include the new inspection and life‑limit requirements from paragraphs 4.3 and 4.4 of the Service Bulletin (Requirement 3).\n\n- Timing (high level):\n - For aircraft that have already accumulated more than 190 flight hours under Aerobatic + Utility categories: AFM/placard changes and the inspection in paragraph 4.4 of the Service Bulletin must be done before next flight; some part replacements follow at the next B/C/Overhaul check (see Compliance for Requirements 1.a–1.d).\n - For aircraft with 190 flight hours or less in Aerobatic + Utility categories: immediate AFM/placard and inspections are required; an initial placard is replaced by a more restrictive placard when the aircraft reaches 190 flight hours in Aerobatic + Utility; required part replacement follows at the next C/Overhaul check (see Requirements 2 and Compliance).\n - All operators must insert the new maintenance tasks into their Maintenance Program within 60 days of 2 August 2007 (Requirement 3).\n\n- Operational effect: Once the specified parts/inspections in the Service Bulletin are completed (Requirement 1.c or 2.d and associated work), affected aircraft may resume Normal category operations until a declared airframe service life of 3,600 flight hours is reached. Until that work is done, aerobatic flights are prohibited for all affected aeroplanes and some are further restricted to Normal category only (Requirements 1–2).\n\n- Document conformity: Inserting a copy of this Directive into the AFM is stated as an acceptable method to comply with the AFM amendment requirements (Requirements 1.a and 2.a, Notes 1 and 2).\n\n\n**Who this affects**\n\n- Primary: Owners and operators of Zlin Z-242L aeroplanes without the wing reinforcement modification, and the maintenance organisations that service them (Applicability; Requirements 1–3).\n- Secondary: Pilots (who must obey the placards and AFM limitations), flight schools or businesses that use these aeroplanes for aerobatic instruction or services (their permitted operations change), and passengers of such flights.\n- Regulator: The Civil Aviation Safety Authority enforces compliance; the directive refers to the manufacturer’s Mandatory Service Bulletin and to later EASA‑approved revisions (Requirements; Background).\n\n\n**Why the rule was introduced (stated purpose) and what it aims to fix**\n\n- Stated reason: Investigations (originating from a Czech CAA report and subsequent EASA action) found risk of wing/airframe fatigue and at least one wing failure on related Zlin models. The Directive therefore prohibits aerobatic operations for non‑reinforced wings, limits the time that may be flown under higher load categories (aerobatic + utility) to 190 hours in aggregate until parts are replaced, and sets a life limit for the airframe (3,600 hours) unless corrective action is taken (Background; Requirements).\n\n\n**Costs, incentives and trade‑offs (practical effects)**\n\n- Who pays: Owners/operators pay for the AFM amendment or insertion of the Directive, cockpit placards, the inspections (non‑destructive inspection of upper wing bolts per paragraph 4.4 of the Service Bulletin), any required parts replacement (paragraph 4.3), and for updating the approved Maintenance Program (Requirements 1–3; Compliance).\n\n- Time and downtime: Some requirements must be done before further flight (immediate compliance for AFM/placard/initial inspections). Other work can wait until the next scheduled B, C or overhaul check, but that still imposes scheduling and potential grounding until the work is done (Compliance for Requirements 1.d, 2.d).\n\n- Operational impact on businesses and private users: Operators that use Z-242L aircraft for aerobatic training, displays or commercial aerobatic activities lose the ability to conduct aerobatic flights until the inspections/parts replacements are completed. For some aircraft, utility operations are also prohibited until parts are changed (Requirements 1–2). That reduces revenue opportunities for affected operators until compliance is achieved.\n\n- Options to avoid restrictions: The Directive does not apply to aircraft that already have the wing reinforcement modification incorporated (Applicability). That implies a retrofit path exists to avoid the restrictions, but the Directive itself requires the specific Service Bulletin work rather than offering alternative mitigations except where later EASA‑approved revisions permit (Requirements; Background).\n\n- Administrative burden: Updating the AFM, inserting a copy of the Directive, installing placards, and amending the approved Maintenance Program are low‑cost paperwork tasks but they require regulator acceptance (in the case of Maintenance Program amendments) and record keeping (Requirements 1.a–1.b; 3).\n\n- Supply and implementation risk: The Directive depends on the manufacturer’s Service Bulletin (Z 242L/51a) and on later EASA‑approved revisions. If parts are scarce, or approved revisions take time, operators may face prolonged restrictions or delayed returns to Normal category operations. Timing references to next scheduled checks (B, C, Overhaul) can postpone replacement work but also create uncertainty for operators (Compliance; Requirements referencing paragraphs 4.2–4.4 of the Service Bulletin).\n\n- Enforcement discretion and variability: The Directive repeatedly permits compliance by reference to “later EASA approved revision” of the Service Bulletin. That creates a flow of external documents that the regulator and operator must track, and it gives the regulator scope to accept later revisions without issuing a new national instrument (Requirements 1–3).\n\n\n**Trade‑offs and unintended substitution effects**\n\n- Substitution: Operators may choose retrofit/wing reinforcement where available (so they fall outside applicability) or may avoid aerobatic work entirely by changing their business model. Both are concrete substitution responses.\n\n- Concentration of costs and benefits: Costs are concentrated on owners/operators of affected aircraft; safety benefits (reduced wing/airframe failure risk) are concentrated to flight crews, passengers, and third parties who might otherwise be harmed. There is no explicit evidence in the Directive text of rent‑seeking or capture by particular suppliers; the Service Bulletin route channels work to approved parts/repair pathways.\n\n\n**Implementation checklist (practical steps required by the Directive)**\n\n1. Determine whether a Z-242L has the wing reinforcement modification; if yes, this Directive does not apply (Applicability).\n2. Check accumulated Aerobatic + Utility flight hours to decide which set of Requirements (1 or 2) applies.\n3. Immediately amend the AFM (or insert a copy of the Directive) and install the required cockpit placard(s) before further flight if required (Requirements 1.a–1.b; 2.a–2.b; Compliance).\n4. Carry out the pre‑flight inspection of upper wing bolts per paragraph 4.4 of Service Bulletin Z 242L/51a (Requirements 1.a; 2.a).\n5. Schedule and do the part replacements/repairs required by paragraph 4.3 (at the specified next checks) to restore Normal category operation up to 3,600 airframe hours (Requirements 1.c–1.d; 2.c–2.d; Compliance).\n6. Update the approved Maintenance Program to include the new inspection and life‑limit items within the stated time (Requirement 3; Compliance).\n\n\n**Source references inside the Directive**\n\n- Applicability: Model Z 242L aircraft without wing reinforcement modification.\n- Requirements: Numbered 1–3 with subparagraphs 1.a–1.d and 2.a–2.d describing AFM/placard work, inspections and part replacements per Moravan Mandatory Service Bulletin Z 242L/51a (paragraphs 4.2, 4.3, 4.4).\n- Compliance timing: Specified against each Requirement (e.g. “before further flight”, “at the next B/C/Overhaul check”, “within 60 days after 2 August 2007”).\n- Background: Cites Czech CAA and EASA investigations and earlier ADs leading to this amendment: purpose stated as preventing wing/airframe fatigue failures and setting an airframe life limit.\n\n"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original 1999 directive addressed wing life limits and aerobatic restrictions. Amendment 1 expanded this to address aerobatic frequency and life-limit the entire airframe rather than just wings. Amendment 2 (this version) further expands scope to prohibit all Aerobatic category operations for non-reinforced wing aircraft, introduces new part replacement requirements for long-term airworthiness, and adds maintenance programme updates. The directive has evolved from a simple operational restriction to a comprehensive structural life management regime."},"complexity_factors":["Bifurcated requirements based on flight hour accumulation (190-hour threshold creates two distinct compliance paths)","Multiple cross-references to external documents (Moravan Mandatory Service Bulletin Z 242L/51a, EASA Emergency AD 2007-0200-E)","Staged compliance deadlines with different triggers (before further flight, next scheduled maintenance check, accumulated flight hours, fixed calendar date)","Nested conditional logic: Requirements 1.a-d vs 2.a-d with different placard wording and different maintenance actions","Technical aviation terminology requiring domain knowledge (Aerobatic/Utility/Normal categories, B/C/Overhaul checks, NDI inspection, airframe/wing attachment)","Amendment structure referencing prior versions and foreign regulatory actions (Czech CAA, FAA, EASA) creating historical dependency"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety limits for Moravan Zlin Z-242L aircraft that lack a specific wing reinforcement. It bans aerobatics (and Utility ops for aircraft with >190 aerobatic hours), requires cockpit placards, AFM updates, bolt inspections/replacements and maintenance changes, and limits use to Normal category until 3,600 total hours, after which grounding is required.\n\nIt targets owners/operators of affected Z-242Ls following a wing failure and metal‑fatigue concerns."}},"importantCases":[],"_links":{"self":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations","history":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations/history","analysis":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations/analysis","conflicts":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations/conflicts","importantCases":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations/important-cases","documents":"/api/acts/ad-z-242l-3-amdt-2-airworthiness-and-operating-limitations/documents"}}