{"id":"F2006B05505","name":"AD/PA-23/78 Amdt 1 - Hose Assembly - Inspection and Replacement","slug":"ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46355,"registerId":"commonwealth-F2006B05505-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/78 Amdt 1 - Hose Assembly - Inspection and Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/78\n\nAmdt 1\n\n\nHose Assembly - Inspection and Replacement 1/79\n\n \n\nApplicability: Model PA-23-250 with S/Nos. 27-7854007 to 27-7854077, 27-7854079 to\n\n27-7854133, 27-7854135 to 27-7854137, 27-7854140 to 27-7954010, 27-7954012,\n\n27-7954013, 27-7954015, 27-7954017 and 27-7954018.\n\n \n\nDocument: Piper SB No. 629.\n\n \n\nCompliance: Within 25 hours time in service after 19 December 1978.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2058},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to the original directive, but maintains the same narrow scope: hose assembly inspection and replacement for the same aircraft model and serial number ranges. No expansion of subject matter or affected fleet."},"complexity_factors":["Single, specific maintenance task with no conditional exceptions","Narrow applicability limited to defined serial number ranges","References external technical document (Piper SB No. 629) without reproducing its contents, requiring operators to source separate instructions","Simple compliance deadline structure using standard aviation metric ('time in service')"],"plain_english_summary":"**What this is:** A mandatory safety order (called an *Airworthiness Directive*) requiring owners of specific Piper Aztec aircraft to inspect and replace certain hose assemblies.\n\n**Who it affects:** Owners and operators of Piper PA-23-250 model aircraft with very specific serial numbers (ranging from 27-7854007 through to 27-7954018). You'll need to check your aircraft's registration papers to see if your serial number matches the list.\n\n**What you must do:** Have your mechanic inspect and replace the hose assemblies exactly as described in **Piper Service Bulletin No. 629**. You must complete this work within **25 hours of flying time** after 19 December 1978.\n\n**Why it matters:** This is a legally binding directive under the Civil Aviation Regulations. It addresses a specific safety defect in the hose assemblies that, if left unchecked, could potentially fail during flight and compromise aircraft safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement","history":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement/history","analysis":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement/important-cases","documents":"/api/acts/ad-pa-23-78-amdt-1-hose-assembly-inspection-and-replacement/documents"}}