{"id":"F2009L00871","name":"AD/PA-42/18 - Elevator Upper Skin Cracking - CANCELLED","slug":"ad-pa-42-18-elevator-upper-skin-cracking-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78124,"registerId":"commonwealth-F2009L00871-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-42 (Cheyenne III) Series Aeropl","sectionType":"division","heading":"Piper PA-42 (Cheyenne III) Series Aeroplanes","content":"### Piper PA-42 (Cheyenne III) Series Aeroplanes\n\n| AD/PA-42/18 | Elevator Upper Skin Cracking | 4/2009 |\n| ----------- | ---------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 9 April 2009.                                                                                                                                                                                                                         |\n| Background:  | This unique Australian AD specified inspection for cracking of the elevator upper skin in accordance with Piper SB No. 887 at the next maintenance release inspection, or within 100 hours time in service, after October 1988. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 February 2009","sortOrder":0},{"sectionNumber":"AD/PA-42/18","sectionType":"part","heading":"AD/PA-42/18","content":"## AD/PA-42/18","sortOrder":1},{"sectionNumber":"Elevator Upper Skin Cracking","sectionType":"part","heading":"Elevator Upper Skin Cracking","content":"## Elevator Upper Skin Cracking","sortOrder":2},{"sectionNumber":"4/2009","sectionType":"part","heading":"4/2009","content":"## 4/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2724},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument deliberately eliminates the scope of the previous directive rather than expanding it. The scope has terminated (reduced to nil), not grown beyond original purpose."},"complexity_factors":["Single operative provision consisting of the word 'CANCELLED'","No defined terms, interpretation clauses, or schedules","No cross-references to other legislative instruments (only historical reference to a manufacturer's service bulletin)","No conditional logic, exceptions, or procedural requirements","Substantive content is approximately 50 words"],"plain_english_summary":"**What this does:** This document officially cancels a previous safety rule that required owners of specific Piper aircraft to inspect the elevator (the movable tail surface that controls up and down movement) for cracks.\n\n**What it used to require:** The previous rule mandated inspections of the elevator upper skin on Piper PA-42 (Cheyenne III) aeroplanes according to Piper Service Bulletin 887. This had to happen either at the next scheduled maintenance check or within 100 flight hours after October 1988.\n\n**What happens now:** As of 9 April 2009, the inspection requirement is **cancelled** and no longer mandatory.\n\n**Who is affected:** Owners and operators of Piper PA-42 (Cheyenne III) series aeroplanes.\n\n**Why this matters:** This removes a mandatory maintenance obligation, likely because the safety risk has been addressed through other means or the aircraft have aged out of the risk profile."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled","history":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled/history","analysis":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled/analysis","conflicts":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled/conflicts","importantCases":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled/important-cases","documents":"/api/acts/ad-pa-42-18-elevator-upper-skin-cracking-cancelled/documents"}}