{"id":"F2006B07628","name":"AD/Z-242L/4 Amdt 1 - Limitation of Operation - 2","slug":"ad-z-242l-4-amdt-1-limitation-of-operation-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50358,"registerId":"commonwealth-F2006B07628-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/Z-242L/4 Amdt 1 - Limitation of Operation - 2","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/Z-242L/4 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nMoravan Zlin Z-242L Series Aeroplanes\n\nAD/Z-242L/4\n\nAmdt 1\n\n  \nLimitation of Operation \\- 2 13/2003\n\nApplicability: Model Z 242L aircraft with serial numbers up to and including serial number 0746\\. Requirement: Action in accordance with Moravan Mandatory Service Bulletin Z 242L/44a.\n\nNote: Czech CAA-AD-T-101/2000R1 refers.\n\nCompliance: As specified in the Requirement document with an effective date of 25 March 2004.\n\nThis Amendment becomes effective on 25 December 2003.\n\nBackground: The Czech CAA requires incorporation of an AMU1 Acceleration Registration Unit (ARU) to determine the individual safe life limit of Z 242L aircraft. Based on ARU records, actual safe life is determined.\n\nThe original issue of this Airworthiness Directive became effective on 24 December 1999.\n\n![Signature of David Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 13 November 2003\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 3 December 2003.\n\n  \n\nPage 1 of 1","sortOrder":0}],"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":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 1999 AD. It updates the compliance deadline and references the current service bulletin, but does not expand applicability to new aircraft models, add new requirements, or alter the fundamental safety purpose (ARU installation for fatigue life monitoring)."},"complexity_factors":["Very short document (1 page, ~250 words)","Only 2 defined applicability criteria (model type + serial number range)","Single requirement referencing an external technical document (Moravan Mandatory Service Bulletin Z 242L/44a)","No nested exceptions or conditional logic — straightforward compliance deadline","Minimal cross-referencing (only to Czech CAA-AD-T-101/2000R1 and the original 1999 AD)","Clear, unambiguous compliance date with no alternative methods of compliance stated"],"plain_english_summary":"This AD revokes and replaces the earlier directive, requiring owners/operators of Moravan Zlin Z-242L aeroplanes (serial numbers 0746 and below) to install an AMU1 Acceleration Registration Unit (ARU) by 25 March 2004, with the AD effective 25 December 2003. \n\nThe ARU records G‑loading so CASA can determine each aircraft’s safe life and prevent fatigue‑related structural failures; non‑compliance grounds the aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment revokes the original AD and replaces it with an express requirement to incorporate an AMU1 ARU and follow Moravan Mandatory Service Bulletin Z 242L/44a for Z‑242L aircraft up to serial 0746, tying determination of each aircraft's safe‑life to ARU records and updating compliance timing (see Applicability; Requirement; Background; Compliance)."},"complexity_factors":["Narrow technical applicability: specific model and serial-number cutoff (Applicability).","Reliance on an external mandatory service bulletin for required action (Requirement: Moravan Mandatory Service Bulletin Z 242L/44a).","Technical installation and ongoing data/recording obligations to determine safe life (Background: incorporation of AMU1 ARU).","Cross-reference to a foreign authority's AD (Note: Czech CAA-AD-T-101/2000R1).","Timing and effective-date layering (This Amendment effective 25 December 2003; Compliance effective date 25 March 2004).","Administrative action: revocation and re-issuance of a prior AD (opening paragraph; original AD effective 24 December 1999)."],"plain_english_summary":"**What this does:** Revokes the earlier airworthiness directive and requires owners/operators of Moravan Zlin Z‑242L aircraft (serial numbers up to and including 0746) to incorporate an AMU1 acceleration registration unit (ARU) and comply with Moravan Mandatory Service Bulletin Z 242L/44a. The ARU records acceleration events so each aeroplane’s individual safe‑life limit can be determined. **Who it affects and why it matters:** Affects the listed aircraft owners/operators who must install and use the ARU and follow the service bulletin to lawfully continue operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2","history":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2/history","analysis":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2/analysis","conflicts":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2/conflicts","importantCases":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2/important-cases","documents":"/api/acts/ad-z-242l-4-amdt-1-limitation-of-operation-2/documents"}}