{"id":"F2008L04409","name":"AD/PA-30/19 - Airflow Modification Kit - Installation - CANCELLED","slug":"ad-pa-30-19-airflow-modification-kit-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76387,"registerId":"commonwealth-F2008L04409-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-30 & 39 (Twin Comanche) Series ","sectionType":"division","heading":"Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes","content":"### Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\n| AD/PA-30/19 | Airflow Modification Kit - Installation | 13/2008 |\n| ----------- | --------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                   |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 18 December 2008.                                                                                                                                                    |\n| Background:  | This unique Australian AD specified installation of an airflow modification kit in accordance with Piper SL No. 558. Compliance was required before July 1972. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n5 November 2008","sortOrder":0},{"sectionNumber":"AD/PA-30/19","sectionType":"part","heading":"AD/PA-30/19","content":"## AD/PA-30/19","sortOrder":1},{"sectionNumber":"Airflow Modification Kit - Installation","sectionType":"part","heading":"Airflow Modification Kit - Installation","content":"## Airflow Modification Kit - Installation","sortOrder":2},{"sectionNumber":"13/2008","sectionType":"part","heading":"13/2008","content":"## 13/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1704},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly one function: cancelling a previous Airworthiness Directive. The scope has not expanded beyond this specific revocation."},"complexity_factors":["Single operative provision (cancellation of previous instrument)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Document consists solely of the revocation statement plus brief background"],"plain_english_summary":"**What this is:** This document officially cancels a previous aviation safety rule (**Airworthiness Directive**) that required owners of Piper PA-30 and PA-39 Twin Comanche aircraft to install a specific hardware update (an airflow modification kit).\n\n**Who is affected:** Owners and operators of Piper PA-30 and PA-39 series aeroplanes.\n\n**What changed:** The original rule mandated installation of the kit to improve airflow. This cancellation removes that requirement entirely—owners no longer need to install the kit to comply with this particular safety directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled","history":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled/history","analysis":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-30-19-airflow-modification-kit-installation-cancelled/documents"}}