{"id":"F2009L01676","name":"AD/TSA-600/42 Amdt 1 - Rear Spar Corrosion - CANCELLED","slug":"ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78511,"registerId":"commonwealth-F2009L01676-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aerostar (Piper/Ted Smith) 600 and 700 S","sectionType":"division","heading":"Aerostar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-600/42 Amdt 1 | Rear Spar Corrosion | 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 for corrosion in the rear spar. The inspection was not based on a manufacturer’s service document. Compliance was required at intervals not exceeding two years. The AD was issued in 1993 and 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-600/42 Amdt 1","sectionType":"part","heading":"AD/TSA-600/42 Amdt 1","content":"## AD/TSA-600/42 Amdt 1","sortOrder":1},{"sectionNumber":"Rear Spar Corrosion","sectionType":"part","heading":"Rear Spar Corrosion","content":"## Rear Spar Corrosion","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":2800},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This amendment terminates all requirements of the original directive, effectively reducing the instrument's scope to nil. This represents a complete removal of the original purpose (mandating inspections) rather than an expansion beyond it."},"complexity_factors":["Single operative provision (the word 'CANCELLED')","No defined terms or interpretation section","No cross-references to other legislation or regulations","No conditional logic, exceptions, or procedural requirements","Minimal background narrative only"],"plain_english_summary":"**The bottom line**: This document scraps a 16-year-old safety rule that forced owners of Aerostar aircraft to check their rear wing spar for rust every two years.\n\n**Who it affects**: Owners and operators of Aerostar (Piper/Ted Smith) 600 and 700 series aeroplanes.\n\n**What it does**: This instrument officially **cancels** Airworthiness Directive (AD) TSA-600/42. Previously, this rule required periodic inspections for corrosion in the rear spar at intervals not exceeding two years. As of 4 June 2009, that specific inspection obligation no longer applies.\n\n**Why it matters**: The original requirement was unique to Australia and not based on manufacturer service documents. After 16 years, the Civil Aviation Safety Authority determined these inspections were no longer necessary. This removes a compliance burden and reduces maintenance costs for aircraft owners while maintaining safety through other regulatory means."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled","history":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled/history","analysis":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled/analysis","conflicts":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled/conflicts","importantCases":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled/important-cases","documents":"/api/acts/ad-tsa-600-42-amdt-1-rear-spar-corrosion-cancelled/documents"}}