{"id":"F2006B04922","name":"AD/CESSNA 150/24 - Beryl Aviation Filtrator Assembly","slug":"ad-cessna-150-24-beryl-aviation-filtrator-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44767,"registerId":"commonwealth-F2006B04922-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 150/24 - Beryl Aviation Filtrator Assembly","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)  Cessna 150, F150, 152 & F152 Series Aeroplanes\n\n \n\nAD/CESSNA 150/24 Beryl Aviation Filtrator Assembly 9/75\n\nApplicability: Models 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K,\n\nA150K, 150L, A150L series which have been modified in accordance with STC SA2219WE.\n\n \n\nRequirement: For Cessna Models 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J,\n\n150K, A150K, 150L and A150L Series Airplanes, remove the Beryl Aviation filtrator assembly P/N 1000-1 and install P/N B-1119-M, P/N B-1119-RN or P/N 1000-1-RM.\n\n \n\nNote: FAA AD 75-15-08 refers.\n\n \n\nCompliance: Within 100 hours time in service after 30 September 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on one defective part on specific aircraft models. It has not expanded beyond its original purpose of mandating replacement of the Beryl Aviation filtrator assembly."},"complexity_factors":["Very short document (under 200 words)","Only 3 operative paragraphs: applicability, requirement, and compliance","Single cross-reference to FAA AD 75-15-08 (informational only)","No defined terms section — all technical terms (P/N, STC) are standard aviation shorthand","No conditional logic or nested exceptions","Straightforward command structure: identify affected aircraft → specify action → set 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). Think of it like a compulsory recall notice, but for aircraft parts.\n\n**What it does:** It orders owners and operators of specific Cessna 150 series aeroplanes to **replace a faulty fuel filter** (the \"Beryl Aviation filtrator assembly\"). The old part (P/N 1000-1) must be removed and replaced with one of three approved alternatives (P/N B-1119-M, P/N B-1119-RN, or P/N 1000-1-RM).\n\n**Who it affects:** Owners and operators of Cessna 150 models (including variants like the A150K and A150L) **that have been modified under a specific FAA approval** called STC SA2219WE. (An STC is a \"Supplemental Type Certificate\" — official permission to alter an aircraft's design.)\n\n**Why it matters:** The original Beryl Aviation filter was apparently unsafe — likely prone to failure that could cause engine stoppage or fuel contamination. This directive prevents potential accidents by forcing replacement of the defective part.\n\n**The deadline:** Aircraft operators had to complete this replacement **within 100 hours of flying time** after 30 September 1975.\n\n**Key point:** This mirrors an American safety order (FAA AD 75-15-08), showing how Australia often adopts US aviation safety standards."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is stated in the text: it applies to specified Cessna 150-series aircraft that have been modified under STC SA2219WE and mandates replacement of a specified filtrator part with one of three identified part numbers within a defined compliance window. The instrument text shows no indication that its scope has been altered from that stated; there is no language in the supplied text suggesting expansion or narrowing beyond the express Applicability and Requirement."},"complexity_factors":["Narrow, specific applicability limited to Cessna 150-series aircraft modified under STC SA2219WE (Applicability)","Single, prescriptive technical action: remove a specific P/N and install one of three specified P/Ns (Requirement)","Fixed compliance window tied to a historical date (100 hours after 30 September 1975) (Compliance)","Cross-reference to an external FAA AD for technical justification rather than including technical detail in the directive (Note)","Regulatory nature leaves little operational discretion for affected operators (header; Requirement)"],"plain_english_summary":"This airworthiness directive mandates that owners/operators of Cessna 150-series aeroplanes modified under STC SA2219WE remove the Beryl Aviation filtrator assembly P/N 1000-1 and install one of the approved replacements (B-1119-M, B-1119-RN or 1000-1-RM). The swap was compulsory within 100 hours TIS after 30 Sept 1975, with costs and scheduling borne by the aircraft owner; the directive cites FAA AD 75-15-08 for technical background."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly","history":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly/history","analysis":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly/analysis","conflicts":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly/conflicts","importantCases":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly/important-cases","documents":"/api/acts/ad-cessna-150-24-beryl-aviation-filtrator-assembly/documents"}}