{"id":"F2008L04017","name":"AD/DHA-3/6 - Fuel Filter - Modification - CANCELLED","slug":"ad-dha-3-6-fuel-filter-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75836,"registerId":"commonwealth-F2008L04017-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"DHA-3 (Drover) Series Aeroplanes","sectionType":"division","heading":"DHA-3 (Drover) Series Aeroplanes","content":"### DHA-3 (Drover) Series Aeroplanes\n\n| AD/DHA-3/6 | Fuel Filter - Modification | 12/2008 |\n| ---------- | -------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                    |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 November 2008.                                                                                                                                                                                                                                                                                     |\n| Background:  | This AD was raised in 1953 requiring a modification to remove and discard both main fuel filters (DH Part No. P3/341A) and relocate filter installation using approved replacement filters.Compliance was forthwith.As all affected aircraft would have been modified by now, this AD is considered to be no longer required. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n9 October 2008","sortOrder":0},{"sectionNumber":"AD/DHA-3/6","sectionType":"part","heading":"AD/DHA-3/6","content":"## AD/DHA-3/6","sortOrder":1},{"sectionNumber":"Fuel Filter - Modification","sectionType":"part","heading":"Fuel Filter - Modification","content":"## Fuel Filter - Modification","sortOrder":2},{"sectionNumber":"12/2008","sectionType":"part","heading":"12/2008","content":"## 12/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1351},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a termination instrument that cancels the original 1953 Airworthiness Directive. The scope has not expanded beyond the original subject matter (fuel filter modifications for DHA-3 aircraft); rather, it has been extinguished entirely as the regulatory requirement is now obsolete."},"complexity_factors":["Single operative sentence ('This AD is cancelled')","No defined terms or interpretation section","No conditional logic or exceptions","No cross-references to other legislation","Document length is under 100 words"],"plain_english_summary":"**What this does:** This document officially cancels a 1953 aircraft safety rule that required owners of DHA-3 Drover aeroplanes to modify their fuel filter systems.\n\n**Who it affects:** Owners and operators of DHA-3 (Drover) Series Aeroplanes — a type of small aircraft manufactured by de Havilland Australia in the late 1940s and early 1950s.\n\n**Why it matters:** The original rule required removal of specific fuel filters (Part No. P3/341A) and installation of approved replacement filters to ensure flight safety. Because all affected aircraft have already completed this modification over the past 55 years, the rule is no longer needed. This cancellation notice formally removes the requirement, cleaning up the regulatory books.\n\n**Key point:** If you own a Drover aircraft, you no longer need to worry about this specific fuel filter directive — though you must still comply with other current airworthiness requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled","history":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled/history","analysis":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled/analysis","conflicts":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled/conflicts","importantCases":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled/important-cases","documents":"/api/acts/ad-dha-3-6-fuel-filter-modification-cancelled/documents"}}