{"id":"F2009L00206","name":"AD/PA-23/83 - Heater Fuel Regulator Valve Shroud - Drain Modification - CANCELLED","slug":"ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76672,"registerId":"commonwealth-F2009L00206-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23 (Apache and Aztec) Series Aeroplanes","content":"### Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n| AD/PA-23/83 | Heater Fuel RegulatorValve Shroud - Drain Modification | 2/2009 |\n| ----------- | ------------------------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                     |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 February 2009.                                                                                                                                                                                                      |\n| Background:  | This unique Australian AD specified once-only modification of the drain of the Janitrol heater fuel regulator valve shroud in accordance with Piper SB No. 721 within 100 hours time in service after July 1982. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n23 December 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/83","sectionType":"part","heading":"AD/PA-23/83","content":"## AD/PA-23/83","sortOrder":1},{"sectionNumber":"Heater Fuel RegulatorValve Shroud - Drai","sectionType":"part","heading":"Heater Fuel RegulatorValve Shroud - Drain Modification","content":"## Heater Fuel Regulator  \nValve Shroud - Drain Modification","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2057},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the previous Airworthiness Directive entirely. It does not expand the scope beyond the original purpose; rather, it removes all regulatory requirements that the original AD imposed."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Document consists entirely of administrative cancellation and background context"],"plain_english_summary":"**What this document does**\n\nThis document officially cancels a previous aviation safety rule (Airworthiness Directive AD/PA-23/83) that applied to Piper PA-23 Apache and Aztec aircraft.\n\n**What it used to require**\n\nPreviously, owners of these aircraft had to modify the drain on the heater fuel regulator valve shroud (part of the cabin heating system) according to manufacturer instructions (Piper Service Bulletin No. 721). This modification had to be completed within 100 hours of flying time after July 1982.\n\n**What happens now**\n\nAs of 12 February 2009, aircraft owners and operators no longer need to comply with this specific modification requirement. The safety directive is no longer in force.\n\n**Who is affected**\n\nOwners, operators, and maintenance engineers working on Piper PA-23 (Apache and Aztec) series aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled","history":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled/history","analysis":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-23-83-heater-fuel-regulator-valve-shroud-drain-modification-cancelled/documents"}}