{"id":"F2009L01721","name":"AD/TSA-600/24 - Nose Landing Gear Support Structure - Inspection and Modification - CANCELLED","slug":"ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78597,"registerId":"commonwealth-F2009L01721-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aerostar (Piper/Ted Smith) 600 and 700 S","sectionType":"division","heading":"Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes","content":"### Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes\n\n| AD/TSA-600/24 | Nose Landing Gear SupportStructure - Inspection and Modification | 6/2009 |\n| ------------- | ---------------------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                      |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 4 June 2009.                                                                                                                                                                                                                            |\n| Background:  | This unique Australian AD specified periodic inspection of the NLG support structure in accordance with Piper Aerostar SB No. 600-82 Rev A until modified. SBNo. 600-82 Rev A specified modification no later than November 1980. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2009","sortOrder":0},{"sectionNumber":"AD/TSA-600/24","sectionType":"part","heading":"AD/TSA-600/24","content":"## AD/TSA-600/24","sortOrder":1},{"sectionNumber":"Nose Landing Gear SupportStructure - Ins","sectionType":"part","heading":"Nose Landing Gear SupportStructure - Inspection and Modification","content":"## Nose Landing Gear Support  \nStructure - Inspection and Modification","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1685},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the legislation entirely rather than altering its scope. The original AD mandated specific airworthiness actions; this cancellation removes those requirements completely because they are no longer necessary."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic or exceptions","Brief background explanation only"],"plain_english_summary":"**What this does:** This document formally cancels a previous aviation safety rule (Airworthiness Directive AD/TSA-600/24) that applied to specific Aerostar aircraft.\n\n**Who it affects:** Owners and operators of Aerostar (Piper/Ted Smith) 600 and 700 series aeroplanes.\n\n**Why it matters:** The original rule required regular inspection and eventual modification of the nose landing gear support structure to prevent failures. The modification deadline specified in the relevant Piper service bulletin (November 1980) has long passed, meaning all affected aircraft should now be compliant. This cancellation removes the outdated inspection and modification requirements as of 4 June 2009, reducing compliance burdens for aircraft operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled","history":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled/history","analysis":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled/analysis","conflicts":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled/conflicts","importantCases":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled/important-cases","documents":"/api/acts/ad-tsa-600-24-nose-landing-gear-support-structure-inspection-and-modification-cancelled/documents"}}