{"id":"F2006B08071","name":"AD/CESSNA 210/20 Amdt 3 - Aft Tailcone Assembly","slug":"ad-cessna-210-20-amdt-3-aft-tailcone-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115163,"registerId":"commonwealth-F2006B08071-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 210/20 Amdt 3 - Aft Tailcone Assembly","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)  Cessna 210 Series Aeroplanes\n\n \n\nAD/CESSNA 210/20\n\nAmdt 3\n\n\nAft Tailcone Assembly 12/85\n\n \n\nApplicability: All model 210 Series Serial Nos 21057841 to 21059739. Requirement:  Action in accordance with Cessna SL SE72-29.\n\nCompliance: As detailed in the Requirement Document.\n\n \n\nNote: Inspections carried out in accordance with the previous issue of this Directive may be taken as meeting the requirements of Cessna SL SE72-3.\n\n \n\nBackground: This Directive is amended to reflect production changes to later serial no. aircraft.\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":true,"description":"The original directive (issued 12/85) has been amended three times. Amendment 3 specifically expands the serial number range to include later production aircraft that were not covered by earlier versions, reflecting 'production changes to later serial no. aircraft.' This is a modest scope expansion rather than a fundamental change in purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 1 defined applicability criterion (serial number range)","Single cross-reference to external technical document (Cessna SL SE72-29)","No nested conditions or exceptions — straightforward compliance requirement","Amendment history noted but does not create interpretive complexity"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Cessna 210 series aeroplanes** (specifically serial numbers 21057841 to 21059739) to take specific maintenance action on the **aft tailcone assembly** (the rear section of the aircraft's fuselage).\n- The required action must follow **Cessna Service Letter SE72-29** — a technical document from the manufacturer detailing inspection or repair procedures.\n\n**Who it affects:**\n- Owners, operators, and maintenance organisations responsible for Cessna 210 aircraft built within the specified serial number range.\n\n**Why it matters:**\n- Airworthiness Directives are **legally binding**. Non-compliance means the aircraft cannot be flown legally in Australia.\n- This particular directive addresses potential structural issues with the tailcone. The amendment expands the scope to cover additional aircraft that were produced after the original directive was issued (hence \"production changes to later serial no. aircraft\").\n\n**Key practical note:** If you've already done inspections under the old version of this directive, those still count — you don't need to redo them."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD has been amended to reflect production changes affecting later serial-numbered aircraft. The instrument now applies specifically to model 210 series aircraft with serial numbers 21057841 to 21059739 (Applicability) and directs action according to Cessna SL SE72-29 (Requirement). The Background states the amendment is to account for production differences, which changes the set of aircraft and technical instructions to which the AD applies."},"complexity_factors":["Narrow applicability limited to a specific range of aircraft serial numbers (Applicability).","Mandatory actions are defined by an external manufacturer document (Cessna SL SE72-29) rather than in the AD text (Requirement).","Compliance timing and detailed procedures are not contained in the AD; they are in the referenced Service Letter (Compliance).","Previous-issue compliance is explicitly accepted for a related service letter, which affects interpretation of who still needs to act (Note).","Amendment is tied to production changes for later serial numbers, requiring operators to check serial-number-specific applicability (Background)."],"plain_english_summary":"This CASA Airworthiness Directive legally requires owners/operators of Cessna 210 aeroplanes with serial numbers 21057841–21059739 to obtain and carry out the actions specified in Cessna Service Letter SE72-29 for the aft tailcone assembly. The amendment reflects production changes to later serial numbers; compliance costs (parts, labour, downtime) fall on operators, and inspections done under the prior Directive issue may satisfy this requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly","history":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly/history","analysis":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly/analysis","conflicts":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly/conflicts","importantCases":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly/important-cases","documents":"/api/acts/ad-cessna-210-20-amdt-3-aft-tailcone-assembly/documents"}}