{"id":"F2006B05890","name":"AD/PA-34/19 - Turbocharger Oil Hose - Modification","slug":"ad-pa-34-19-turbocharger-oil-hose-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135938,"registerId":"commonwealth-F2006B05890-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/19 - Turbocharger Oil Hose - Modification","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-34 (Seneca) Series Aeroplanes\n\n \n\nAD/PA-34/19 Turbocharger Oil Hose - Modification 12/75\n\nApplicability: Model PA34-200T with S/Nos. 34-7570001 to 34-7670077. Document:  Piper SB No. 483.\n\nCompliance: Within 25 hours time in service after 16 December 1975.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific technical defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating a single modification to prevent turbocharger oil hose failures."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","Only one defined applicability criterion (specific serial number range)","Single compliance action referenced to external document (Piper SB 483)","Simple time-based compliance trigger (25 hours time in service after fixed date)","No nested exceptions, conditional logic, or cross-references to other legislation","Clear, unambiguous command structure: applicability → document reference → compliance deadline"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Piper PA-34-200T Seneca aircraft (serial numbers 34-7570001 through 34-7670077) to modify the **turbocharger oil hose**. This is a safety-critical component that supplies oil to the turbocharger; if it fails, it could cause engine damage or failure.\n\n**Who must comply:** Anyone operating the affected Piper Seneca aircraft models within the specified serial number range.\n\n**How to comply:** Follow the instructions in **Piper Service Bulletin No. 483** (the manufacturer's official technical notice) to modify the oil hose.\n\n**Deadline:** The modification must be completed within **25 hours of flight time** after 16 December 1975.\n\n**Why it matters:** Airworthiness Directives are legally binding. Non-compliance means the aircraft cannot legally fly. This specific AD addresses a known defect or potential failure mode in the turbocharger oil system that could compromise flight safety."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"There is no indication in the provided text that the scope was altered from the instrument’s original specification. The AD as presented sets a fixed applicability (Model PA34-200T, S/N 34-7570001 to 34-7670077), references a single service bulletin for the modification (Piper SB No. 483), and imposes a single compliance deadline (25 hours TIS after 16 December 1975). Together these elements define the scope; nothing in the text shows expansion or narrowing beyond those terms."},"complexity_factors":["Narrow applicability limited to a single model and a precise serial number range (Applicability).","Single, discrete technical requirement (turbocharger oil hose modification) rather than multiple interlocking mandates.","Short, fixed compliance window (25 hours TIS after 16 December 1975) creates scheduling pressure (Compliance).","Dependence on an external technical document (Piper SB No. 483) increases implementation steps because the AD does not include the procedure (Document: Piper SB No. 483).","Absence of technical detail and enforcement language in the AD text reduces legal complexity but shifts operational complexity to implementers obtaining and applying the service bulletin."],"plain_english_summary":"This AD requires owners/operators of Piper PA‑34‑200T aircraft (ser. no. 34‑7570001 through 34‑7670077) to have the turbocharger oil hose modified per Piper Service Bulletin No. 483 within 25 hours TIS after 16 December 1975. It’s a narrowly targeted, time‑urgent mandate: affected owners must obtain the SB, pay for and perform the modification, while the AD delegates technical details to the manufacturer’s bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification","history":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification/history","analysis":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification/analysis","conflicts":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification/conflicts","importantCases":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification/important-cases","documents":"/api/acts/ad-pa-34-19-turbocharger-oil-hose-modification/documents"}}