{"id":"F2006B07629","name":"AD/Z-242L/5 - Engine Oil System Adhesive Joints","slug":"ad-z-242l-5-engine-oil-system-adhesive-joints","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50359,"registerId":"commonwealth-F2006B07629-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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\nMoravan Zlin Z 242L series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/Z-242L/5 Engine Oil System Adhesive J","sectionType":"part","heading":"AD/Z-242L/5 Engine Oil System Adhesive Joints 3/2003","content":"# AD/Z-242L/5 Engine Oil System Adhesive Joints 3/2003\n\nDM\n\nApplicability: All Z 242L series aircraft.\n\nRequirement: 1. Inspect the engine oil system plumbing for evidence of loosening of the “Tee” assembly part number (P/N) L 242.7100-06.00 or L 242.7600-06.00 and “Elbow” assembly P/N L 242.7100-05.00 in accordance with Moravan Mandatory Bulletin Z 242L/42a.\n\n2. Amend the Z 242L Maintenance Manual (document number 003.021.1) in accordance with Moravan Mandatory Bulletin Z 242L/42a.\n\nNote: Czech Republic Airworthiness Directive CAA-AD-098/2002 refers.\n\nCompliance: Requirement 1: Within 10 hours aircraft time in service from the effective date of this directive and thereafter at each scheduled aircraft periodic inspection.\n\nRequirement 2: No later than next scheduled aircraft periodic inspection. This Airworthiness Directive becomes effective on 29 January 2003.\n\nBackground: This directive has been issued to address the possibility of loosening of the adhesive joints in the engine oil system plumbing may obstruct the flow of oil to the engine and result in engine failure.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 13 January 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 29 January 2003.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope matches its stated purpose: to detect and correct possible loosening of adhesive joints in the engine oil plumbing by mandating inspection and a maintenance-manual amendment for all Z 242L aircraft. It does not expand obligations beyond those two actions or impose additional operational restrictions."},"complexity_factors":["Narrow technical scope limited to specific part numbers (P/Ns) for Tee and Elbow assemblies","Direct reliance on an external manufacturer document (Moravan Mandatory Bulletin Z 242L/42a) for inspection and amendment instructions","Clear, short compliance timeframes (10 aircraft hours and next scheduled periodic inspection) reducing procedural ambiguity","Obligation to amend the aircraft Maintenance Manual introduces an administrative step for operators","Applicability to an entire aircraft type (all Z 242L series) concentrates compliance on that operator cohort","Cross-reference to a foreign AD (Czech Republic CAA-AD-098/2002) which may require comparing multiple documents"],"plain_english_summary":"This directive requires operators of all Moravan Zlin Z 242L aeroplanes to inspect specific engine-oil plumbing joints (Tee P/N L 242.7100-06.00 or L 242.7600-06.00 and Elbow P/N L 242.7100-05.00) for loosening and to amend the Z 242L Maintenance Manual, following Moravan Mandatory Bulletin Z 242L/42a. Operators pay for the inspections and manual change; inspections must occur within 10 aircraft hours and then at each scheduled periodic inspection, and the manual amendment by the next scheduled periodic inspection (Requirement 1–2; Compliance)."},"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 mechanical defect in a single aircraft type. The scope remains precisely limited to the identified unsafe condition (adhesive joint failure in oil system plumbing) and has not expanded beyond this original technical purpose."},"complexity_factors":["Single aircraft type applicability with no conditional exceptions","Only 2 distinct requirements (visual inspection + documentation update)","No defined terms section — uses plain part numbers and references external technical bulletins","Simple temporal compliance structure (10 hours TIS, then recurring at periodic inspections)","No nested exceptions or conditional logic — straightforward 'all aircraft' mandate","Cross-references only to external manufacturer bulletins, not to other legislative instruments"],"plain_english_summary":"This is an **Airworthiness Directive** — a legally binding safety order issued by Australia's aviation regulator (CASA) that requires specific maintenance actions on certain aircraft.\n\n**What it does:**\n- Requires owners/operators of **Moravan Zlin Z 242L series aeroplanes** to inspect the engine oil system for loose fittings (specifically \"Tee\" and \"Elbow\" assemblies) that were originally glued together.\n- Also requires updating the aircraft's maintenance manual with new instructions.\n\n**Why it matters:**\nThe glued joints in the oil plumbing can come loose. If they do, they can block oil flow to the engine, causing **engine failure** — a serious flight safety risk.\n\n**Who must act:**\nAnyone operating or maintaining a Z 242L aircraft.\n\n**When:**\n- **First inspection:** Within 10 hours of flying time after 29 January 2003, then repeated at every regular scheduled inspection.\n- **Manual update:** By the next scheduled inspection after the directive takes effect."}},"importantCases":[],"_links":{"self":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints","history":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints/history","analysis":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints/analysis","conflicts":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints/conflicts","importantCases":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints/important-cases","documents":"/api/acts/ad-z-242l-5-engine-oil-system-adhesive-joints/documents"}}