{"id":"F2006B05545","name":"AD/PA-24/7 - Control Wheel Sprocket Mounting Hole - Inspection","slug":"ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46476,"registerId":"commonwealth-F2006B05545-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-24/7 - Control Wheel Sprocket Mounting Hole - Inspection","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)  Piper PA-24 (Comanche) Series Aeroplanes\n\n \n\nAD/PA-24/7 Control Wheel Sprocket Mounting Hole - Inspection NK\n\nApplicability: Models PA-24 and PA-24-250 with S/Nos. prior to 24-886 as detailed in requirement document.\n\n \n\nDocument: 1. Piper SB No. 172; or\n\n \n\n2. FAA AD 59-12-9.\n\n \n\nCompliance: Forthwith.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft model range. It has not expanded beyond its original purpose of ensuring the airworthiness of the control wheel sprocket mounting hole in early-model PA-24 aircraft."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — uses plain language and standard aviation terminology","No cross-referencing to other legislation sections — only references external technical documents (Piper SB and FAA AD)","Simple conditional structure: single applicability criterion (specific serial numbers)","Single compliance requirement with immediate effect","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Piper PA-24 Comanche aircraft** to inspect a particular part: the **control wheel sprocket mounting hole**.\n\n**Who it affects:**\n- Owners and operators of Piper PA-24 and PA-24-250 model aircraft with **serial numbers before 24-886**\n\n**What it requires:**\n- An inspection of the control wheel sprocket mounting hole (a component in the aircraft's control system)\n- Compliance is required **\"forthwith\"** — meaning immediately, without delay\n\n**Why it matters:**\nThis directive addresses a potential safety defect that could affect the aircraft's control systems. Airworthiness Directives are legally binding — failure to comply means the aircraft cannot legally fly. The directive references a **Piper Service Bulletin** and an **FAA Airworthiness Directive** (from the US aviation regulator), indicating this addresses a known defect that has been identified internationally.\n\n**Key point:** This is not optional maintenance advice — it's a legal requirement for airworthiness."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The provided AD text specifies applicability (Models PA-24 and PA-24-250 with S/Ns prior to 24-886), references the technical documents that set inspection and repair requirements (Piper SB No. 172 or FAA AD 59-12-9), and requires compliance 'Forthwith'. There is no language in the text indicating a change from an earlier or different scope; the instrument stands as a targeted inspection requirement for the listed serial-number range."},"complexity_factors":["Directive delegates technical procedure and corrective actions to external documents (Piper SB No. 172 or FAA AD 59-12-9), increasing practical complexity for compliance.","\"Forthwith\" timing is urgent but unspecific, requiring operator judgement and scheduling decisions.","Applicability is limited by a serial-number cutoff (S/N prior to 24-886), requiring record checks to determine if an aircraft is affected.","The AD text contains no repair or compliance detail itself, so operators must obtain and interpret the referenced documents.","Potential operational impacts (downtime, parts availability, labour) depend on findings from the inspection and are not specified in the AD."],"plain_english_summary":"Operators of Piper PA-24 and PA-24-250 aeroplanes with serial numbers before 24‑886 must, forthwith, inspect the control wheel sprocket mounting hole and carry out any corrective work required by Piper Service Bulletin No. 172 or FAA AD 59‑12‑9. Owners/operators bear inspection and repair costs; maintenance organisations or certificated mechanics perform the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection","history":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection/history","analysis":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection/analysis","conflicts":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection/conflicts","importantCases":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection/important-cases","documents":"/api/acts/ad-pa-24-7-control-wheel-sprocket-mounting-hole-inspection/documents"}}