{"id":"F2008L04508","name":"AD/PA-38/26 - Carburettor Air Box Valve - CANCELLED","slug":"ad-pa-38-26-carburettor-air-box-valve-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76550,"registerId":"commonwealth-F2008L04508-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-38 (Tomahawk) Series Aeroplanes","sectionType":"division","heading":"Piper PA-38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-38/26 | Carburettor Air Box Valve | 13/2008 |\n| ----------- | ------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 18 December 2008.                                                                                                                                                                                                                     |\n| Background:  | This unique Australian AD specified inspection for loose screws in the carburettor air box valve in accordance with Piper SB No. 851. Compliance was required at the next scheduled maintenance inspection after December 1986. 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-38/26","sectionType":"part","heading":"AD/PA-38/26","content":"## AD/PA-38/26","sortOrder":1},{"sectionNumber":"Carburettor Air Box Valve","sectionType":"part","heading":"Carburettor Air Box Valve","content":"## Carburettor Air Box Valve","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":2956},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument has terminated its own legal effect entirely. Rather than expanding beyond its original purpose, it has ceased to impose any regulatory requirements, effectively reducing its scope to nil."},"complexity_factors":["Single operative provision consisting of the word 'CANCELLED'","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Background text provides historical context only with no legal operative effect"],"plain_english_summary":"This **Airworthiness Directive (AD)**—a safety rule issued by the aviation regulator—cancels a previous maintenance requirement for Piper PA-38 Tomahawk aeroplanes.\n\n**What it does:**\n*   **Cancels** the previous requirement to inspect for loose screws in the carburettor air box valve (part of the engine air intake system) according to Piper Service Bulletin 851.\n*   Took effect on 18 December 2008.\n\n**Who it affects:**\nOwners and operators of Piper PA-38 (Tomahawk) series aircraft.\n\n**Why it matters:**\nThe original safety check (required since 1986) is no longer deemed necessary. This removes that specific maintenance burden from aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled","history":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled/history","analysis":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled/analysis","conflicts":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled/conflicts","importantCases":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled/important-cases","documents":"/api/acts/ad-pa-38-26-carburettor-air-box-valve-cancelled/documents"}}