{"id":"F2009L01482","name":"AD/FU24/19 - Engine Mounts and Firewalls - CANCELLED","slug":"ad-fu24-19-engine-mounts-and-firewalls-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78066,"registerId":"commonwealth-F2009L01482-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airparts (NZ) Ltd. FU 24 Series Aeroplan","sectionType":"division","heading":"Airparts (NZ) Ltd. FU 24 Series Aeroplanes","content":"### Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n| AD/FU24/19 | Engine Mounts and Firewalls | 5/2009 |\n| ---------- | --------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                       |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 7 May 2009.                                                                                                                                                                                                              |\n| Background:  | This unique Australian AD, issued in 1968, required inspection of the engine mounts and the firewall every 100 hours. As no defects have been reported and these inspections are covered by scheduled maintenance, the AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n26 March 2009","sortOrder":0},{"sectionNumber":"AD/FU24/19","sectionType":"part","heading":"AD/FU24/19","content":"## AD/FU24/19","sortOrder":1},{"sectionNumber":"Engine Mounts and Firewalls","sectionType":"part","heading":"Engine Mounts and Firewalls","content":"## Engine Mounts and Firewalls","sortOrder":2},{"sectionNumber":"5/2009","sectionType":"part","heading":"5/2009","content":"## 5/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1652},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has completely reversed its original purpose. Originally issued in 1968 to impose mandatory inspection requirements on aircraft operators, this version eliminates those obligations entirely. The scope has shifted from active regulatory oversight and enforcement to abolition of the previous rule."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No cross-references to other legislation beyond the AD being cancelled","Approximately 50 words of substantive regulatory text","No conditional logic, exceptions, or procedural requirements"],"plain_english_summary":"Owners and operators of Airparts (NZ) Ltd FU 24 series aeroplanes: a long-standing Airworthiness Directive requiring 100‑hour inspections of engine mounts and the firewall has been cancelled.  \n\nBecause routine scheduled maintenance now covers these checks and no defects were reported in 40+ years, the separate AD was redundant and was revoked effective 7 May 2009."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled","history":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled/history","analysis":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled/analysis","conflicts":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled/conflicts","importantCases":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled/important-cases","documents":"/api/acts/ad-fu24-19-engine-mounts-and-firewalls-cancelled/documents"}}