{"id":"F2006B10765","name":"AD/HUSKY/2 - Carburettor Air Intake Box","slug":"ad-husky-2-carburettor-air-intake-box","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56214,"registerId":"commonwealth-F2006B10765-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HUSKY/2 - Carburettor Air Intake Box","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Christen Industries A-1 (Husky) Series Aeroplanes\n\n \n\nAD/HUSKY/2 Carburettor Air Intake Box 1/92\n\nApplicability: Model A-1 with serial number 1001 through 1045.\n\n \n\nRequirement: Action in accordance with the technical requirements of FAA AD 91-23-02 Amdt 39-8071.\n\n \n\nCompliance: As specified in the requirement document.\n\n \n\nBackground:  Reports of valve engine failures on the air intake box has occurred. This failure could result in loss of engine power.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument establishes a mandatory requirement for a specific subset of Christen A-1 (Husky) aeroplanes and adopts FAA AD 91-23-02 as the technical remedy. The text contains no indication that this changes the originally stated purpose (addressing air intake box valve failures and risk of engine power loss); it implements that stated purpose by mandating the FAA AD measures for the named serial numbers. (Applicability; Requirement; Background)"},"complexity_factors":["Narrow applicability limited to a specific model and serial‑number range (Applicability)","Substantive technical requirements are not written into the instrument but are referenced to an external FAA AD (Requirement)","Compliance timing and procedures are delegated to the referenced document, requiring users to consult another instrument to know exact obligations (Compliance)","Short text with limited provisions reduces internal complexity but increases practical complexity through external dependency (Requirement; Compliance)"],"plain_english_summary":"What this directive does (mechanics)\n\n- It orders specific maintenance action for Christen Industries A-1 (Husky) aeroplanes with serial numbers 1001–1045. (Applicability)\n- The required action is to carry out the technical steps set out in FAA Airworthiness Directive 91-23-02 (Amdt 39-8071). The local instrument adopts that FAA AD as the required remedial work. (Requirement)\n- The timing and exact procedures for compliance are those given in the FAA document: this instrument points to that document for the compliance schedule and technical detail. (Compliance)\n\nWhy the directive exists (stated rationale)\n\n- The directive says there have been reports of valve engine failures in the air intake box. It records that such a failure could cause a loss of engine power. That risk is the stated reason for requiring the FAA AD measures. (Background)\n\nWho is affected and who decides\n\n- Affected parties: owners and operators of Christen A-1 (Husky) aeroplanes with serial numbers 1001 through 1045. (Applicability)\n- Decision/mandate: the Civil Aviation authority requires compliance by adopting FAA AD 91-23-02 as the mandatory technical requirement. (Requirement)\n\nWho pays and what changes in behaviour\n\n- The instrument does not list costs. Mechanically, the practical costs (inspection, parts, labour, aircraft downtime) will be borne by the owners/operators who must carry out the FAA AD actions; this follows from the instrument’s requirement that those actions be performed on the listed aircraft. (Applicability; Requirement)\n- Behaviour change required: affected operators must arrange for the inspections/modifications/repairs specified in FAA AD 91-23-02 and must do so according to the compliance schedule in that FAA AD. (Requirement; Compliance)\n\nTrade-offs, implementation points and risks (source‑grounded)\n\n- The directive’s stated objective is to reduce the risk of air intake box valve failures and potential engine power loss. That is the claim the instrument makes as its justification. (Background)\n- The instrument does not provide estimates of cost, time, or availability of parts/qualified technicians; those implementation details and burdens are left to the procedures and schedules in the referenced FAA AD. The Civil Aviation instrument therefore imposes an obligation but delegates the technical specifics to an external document. (Requirement; Compliance)\n- Because the technical requirements and timing are contained in the FAA AD rather than this instrument, anyone assessing compliance cost or operational impact must consult FAA AD 91-23-02 to see the precise work and deadlines. (Requirement; Compliance)\n\nWhere the directive concentrates its effects\n\n- The directive applies to a narrow set of airframes (serial numbers 1001–1045), so the direct compliance burden is concentrated on that defined group of owners/operators rather than the broader fleet. (Applicability)\n\nSources cited from the instrument: Applicability; Requirement; Compliance; Background."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in a specific aircraft model range. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 defined applicability criterion (serial number range)","No conditional logic or nested exceptions","Single cross-reference to external FAA document (FAA AD 91-23-02)","No interpretation section or defined terms","Straightforward compliance requirement with no alternatives or exemptions stated"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of light aircraft.\n\n**What it does:**\n- Requires owners and operators of **Christen Industries A-1 (Husky) aeroplanes** with serial numbers 1001 through 1045 to inspect or fix a problem with the **carburettor air intake box**.\n- The actual technical work required is set out in an American aviation safety document (FAA AD 91-23-02), which this Australian directive simply points to and makes mandatory.\n\n**Who it affects:**\n- Owners and operators of early-model Husky aircraft (specific serial numbers 1001–1045).\n- Maintenance engineers who work on these planes.\n\n**Why it matters:**\n- The air intake box has been failing, which can cause **complete engine power loss** — obviously catastrophic in flight. This directive forces affected aircraft to be fixed before they can continue flying safely.\n\n**Key point:** This is a \"reference directive\" — it doesn't spell out the technical steps itself, but legally requires compliance with the American FAA document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-husky-2-carburettor-air-intake-box","history":"/api/acts/ad-husky-2-carburettor-air-intake-box/history","analysis":"/api/acts/ad-husky-2-carburettor-air-intake-box/analysis","conflicts":"/api/acts/ad-husky-2-carburettor-air-intake-box/conflicts","importantCases":"/api/acts/ad-husky-2-carburettor-air-intake-box/important-cases","documents":"/api/acts/ad-husky-2-carburettor-air-intake-box/documents"}}