{"id":"F2006B06656","name":"AD/ROTAX/1 - Ignition Unit Rework","slug":"ad-rotax-1-ignition-unit-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48589,"registerId":"commonwealth-F2006B06656-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ROTAX/1 - Ignition Unit Rework","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nRotax Piston Engines\n\nAD/ROTAX/1 Ignition Unit Rework 3/94 DM\n\nApplicability: All Rotax 912 A series engines up to and including serial number 4,076.022. Requirement: If not previously accomplished in accordance with Bombardier Rotax Technical\n\nBulletin 912-02 dated 15 February 1993, then action in accordance with Bombardier\n\nRotax Technical Bulletin 912-02 Revision 1 dated 25 October 1993.\n\nNote: BAZ (Austria) AD 75 dated 1 December 1993 refers.\n\nCompliance: Prior to 28 February 1994.\n\nBackground: Bombardier Rotax has advised that cases of corrosion between the stator and ignition housing at the attachment screws have been reported. This corrosion causes insufficient ground connection which could result in ignition failures. Compliance date required by the BAZ is extended by approximately one month in this Directive.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive retains the same technical scope (rework of ignition units on the specified serial-number range) and the same corrective action reference; the only explicit timing change from the referenced Austrian AD is an approximately one-month extension of the compliance date. (Compliance; Background)"},"complexity_factors":["Narrow applicability limited to Rotax 912 A series engines up to serial number 4,076.022","Single mandatory action that relies on a single external technical bulletin (Bombardier Rotax Technical Bulletin 912-02 Rev 1)","Fixed, near-term compliance deadline (prior to 28 February 1994)","Binary dependency on whether the earlier technical bulletin work was already accomplished","No multi-tiered administrative procedures or discretionary approvals in the text"],"plain_english_summary":"Mandates a physical rework of certain Rotax 912 A series engine ignitions (serial numbers up to 4,076.022) per Bombardier Rotax Technical Bulletin 912‑02 Rev 1 to remedy corrosion at the stator/ignition‑housing screws that can interrupt grounding and cause ignition failures. Owners/operators must arrange and pay for the rework and complete it before 28 February 1994 to address the safety risk."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific manufacturing defect. It has not expanded beyond its original purpose of mandating a specific ignition unit repair."},"complexity_factors":["Single, specific applicability criterion (engine model and serial number range)","One clear requirement referencing external technical documents (manufacturer bulletins)","Single compliance deadline with no conditional extensions","No defined terms section — uses plain technical language","No cross-references to other legislation beyond a note about the Austrian equivalent directive","Background explanation provided in plain language"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific aircraft engines to fix a dangerous corrosion problem.\n\n**What it does:**\n- Orders repairs to the ignition units on **Rotax 912 A series engines** with serial numbers up to 4,076.022\n- Requires mechanics to follow specific technical instructions from the manufacturer (Bombardier Rotax Technical Bulletin 912-02, either the original February 1993 version or the revised October 1993 version)\n\n**The safety problem:**\n- Corrosion was found between the stator (a stationary electrical component) and the ignition housing at the attachment screws\n- This corrosion breaks the electrical ground connection\n- A bad ground connection can cause **ignition failures** — meaning the engine could cut out during flight\n\n**Who must act:**\n- Anyone operating an aircraft with an affected Rotax engine\n- Must complete the rework **before 28 February 1994**\n\n**Why it matters:**\nEngine ignition failures in flight can be catastrophic. This directive forces a preventive fix before the corrosion causes accidents. The Australian deadline is slightly later than the Austrian authority's requirement (giving about one extra month)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rotax-1-ignition-unit-rework","history":"/api/acts/ad-rotax-1-ignition-unit-rework/history","analysis":"/api/acts/ad-rotax-1-ignition-unit-rework/analysis","conflicts":"/api/acts/ad-rotax-1-ignition-unit-rework/conflicts","importantCases":"/api/acts/ad-rotax-1-ignition-unit-rework/important-cases","documents":"/api/acts/ad-rotax-1-ignition-unit-rework/documents"}}