{"id":"F2008L04507","name":"AD/PA-38/20 - Radio Support Installation - CANCELLED","slug":"ad-pa-38-20-radio-support-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76549,"registerId":"commonwealth-F2008L04507-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-38 (Tomahawk) Series Aeroplanes","sectionType":"division","heading":"Piper PA-38 (Tomahawk) Series Aeroplanes","content":"### Piper PA-38 (Tomahawk) Series Aeroplanes\n\n| AD/PA-38/20 | Radio Support 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 removal of plain nuts and replacement with self-locking nuts in accordance with Piper SB No. 748. Compliance was required within 25 hours time in service after September 1982. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n6 November 2008","sortOrder":0},{"sectionNumber":"AD/PA-38/20","sectionType":"part","heading":"AD/PA-38/20","content":"## AD/PA-38/20","sortOrder":1},{"sectionNumber":"Radio Support Installation","sectionType":"part","heading":"Radio Support Installation","content":"## Radio Support 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":1600},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument serves exclusively to cancel a previous Airworthiness Directive. Its scope is strictly limited to terminating the earlier requirement regarding radio support installations, which aligns exactly with its stated purpose."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic or exceptions","No cross-references to substantive legislation","Extremely brief (under 100 words of operative content)"],"plain_english_summary":"This document **cancels a previous aircraft safety rule** for Piper PA-38 Tomahawk aeroplanes.\n\n**What it does:**\n- Officially revokes Airworthiness Directive AD/PA-38/20 as of 18 December 2008\n- Removes a legal obligation that had been in place since 1982\n\n**What the cancelled rule required:**\n- Owners had to replace standard nuts with self-locking nuts in radio support installations\n- The work had to be done within 25 hours of flying time after September 1982\n- This was based on a manufacturer service bulletin (Piper SB No. 748)\n\n**Why it matters:**\nOwners and maintenance engineers no longer need to ensure this specific nut replacement has been performed on these aircraft. The Civil Aviation Safety Authority decided the safety measure was no longer necessary after more than 26 years in force."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled","history":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled/history","analysis":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-38-20-radio-support-installation-cancelled/documents"}}