{"id":"F2006B09289","name":"AD/DIMO/1 - Turbocharge Control Unit Software","slug":"ad-dimo-1-turbocharge-control-unit-software","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53356,"registerId":"commonwealth-F2006B09289-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\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 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\nDiamond HK-36 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/DIMO/1 Turbocharge Control Unit Softw","sectionType":"part","heading":"AD/DIMO/1 Turbocharge Control Unit Software 9/2003","content":"# AD/DIMO/1 Turbocharge Control Unit Software 9/2003\n\nApplicability: HK 36 TTC-ECO powered sailplane with a Rotax 914 F series engine.\n\nRequirement: Check the software version of the Turbocharge Control Unit (TCU) in accordance with Diamond Aircraft Industries GmbH Service Bulletin 66/1 dated 2 November 1999.\n\nNote: Austro Control AD 99 refers.\n\nCompliance: At each engine change or engine overhaul and each time the TCU is modified or replaced.\n\nThis Airworthiness Directive becomes effective on 4 September 2003.\n\nBackground: Austro Control has advised that following an engine change or TCU change, the TCU software version may not correspond with aircraft instrumentation configuration.\n\n![Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 25 July 2003","sortOrder":1}],"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":3,"scope_assessment":{"changed":false,"description":"Scope aligns with the stated issue: prevent mismatches between TCU software and aircraft instrumentation after engine or TCU changes. It is limited to HK‑36 TTC‑ECO with Rotax 914 F engines and prescribes checks at specified maintenance events (Applicability; Requirement; Compliance; Background). No expansion or narrowing beyond that technical remediation is evident in the text."},"complexity_factors":["Narrow technical scope: applies only to Diamond HK‑36 TTC‑ECO with Rotax 914 F (Applicability).","Single, specific compliance action: check software version per Diamond Service Bulletin 66/1 (Requirement).","Recurring compliance triggers tied to maintenance events (engine change/overhaul, TCU modify/replace) rather than calendar time (Compliance).","Reliance on an external document (Diamond Service Bulletin 66/1 dated 2 Nov 1999) to define the inspection procedure (Requirement).","Cross-reference to a foreign regulator AD (Austro Control AD 99) introduces coordination/traceability considerations (Note).","Authority delegated to CASA delegate for issuance (Signature) — limited discretionary content within the AD text."],"plain_english_summary":"This AD requires owners/operators of Diamond HK‑36 TTC‑ECO sailplanes with Rotax 914 F engines to verify the Turbocharge Control Unit (TCU) software version against Diamond Aircraft Industries Service Bulletin 66/1 (2 Nov 1999). The check must be done at each engine change or overhaul, and whenever the TCU is modified or replaced. The CASA delegate issued the directive to correct mismatches between TCU software and aircraft instrumentation (Applicability; Requirement; Compliance; Background; Signature)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific technical issue with a specific aircraft model. It has not expanded beyond its original purpose of ensuring TCU software compatibility."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly used (TCU - explained in context)","Single, straightforward requirement with clear compliance triggers","No cross-references to other legislation beyond a single note referencing another AD","No conditional logic or nested exceptions","Clear applicability limited to specific aircraft model and engine combination"],"plain_english_summary":"This is a safety order for a specific type of glider (the Diamond HK-36 TTC-ECO with a Rotax 914 F engine). It requires mechanics to check the software version of the Turbocharge Control Unit (TCU) — a computer that manages the engine's turbocharger — whenever the engine is changed, overhauled, or when the TCU itself is modified or replaced. This check must follow the manufacturer's service bulletin (Diamond Aircraft Industries Service Bulletin 66/1 from November 1999). The rule exists because Austrian aviation authorities found that after engine or TCU changes, the software might not match the aircraft's instruments, which could create unsafe flying conditions. The directive took effect on 4 September 2003."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dimo-1-turbocharge-control-unit-software","history":"/api/acts/ad-dimo-1-turbocharge-control-unit-software/history","analysis":"/api/acts/ad-dimo-1-turbocharge-control-unit-software/analysis","conflicts":"/api/acts/ad-dimo-1-turbocharge-control-unit-software/conflicts","importantCases":"/api/acts/ad-dimo-1-turbocharge-control-unit-software/important-cases","documents":"/api/acts/ad-dimo-1-turbocharge-control-unit-software/documents"}}