{"id":"F2006B03790","name":"AD/BEECH 33/23 - Beryl Aviation Filtrator Assembly","slug":"ad-beech-33-23-beryl-aviation-filtrator-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43386,"registerId":"commonwealth-F2006B03790-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 33/23 - 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)  Beechcraft 33 and 35-33 (Debonair/Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 33/23 Beryl Aviation Filtrator Assembly 10/75\n\nApplicability: Models 35-33, 35-A33, 35-B33 and 35-C33 which have been modified in accordance with FAA Supplemental Type Certificate No. SA 2219 WE (installation of engine crank-case breather and vacuum pump air-oil separator).\n\n \n\nRequirement: Remove the Beryl Aviation filtrator assembly P/No. 1000-1 and install P/No. B-1114- M, P/No. B-1114-RM or P/No. 1000-1 RM.\n\n \n\nNote: FAA AD No. 75-15-08 refers.\n\n \n\nCompliance: Within 100 hours time in service after 28 November 1975.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself specifies its scope: it applies to the listed Beechcraft models modified under FAA STC SA 2219 WE and requires replacement of a specific part within a defined compliance window (Applicability; Requirement; Compliance). The text contains no statement that the scope has been expanded or reduced from an earlier intent, and only references FAA AD No. 75-15-08 without indicating any change of scope. Therefore there is no evidence in this document that the scope has changed from the original intent."},"complexity_factors":["Narrow and specific applicability (limited to named Beechcraft models with a particular FAA STC). (Applicability)","Single, straightforward technical requirement (remove a named part and install one of three named part numbers). (Requirement)","Clear, short compliance deadline expressed in flight hours and a calendar anchor date. (Compliance)","Reference to external FAA AD for underlying rationale increases the need to consult another document for full technical context. (Note)"],"plain_english_summary":"What this instrument does (mechanical change)\n\n- It orders owners/operators of certain Beechcraft aeroplanes to remove a specific oil/air filtrator unit and fit a listed replacement part. (Requirement)\n- The change must be done within 100 hours time-in-service after 28 November 1975. (Compliance)\n\nWho this affects\n\n- Owners and operators of Beechcraft Models 35-33, 35-A33, 35-B33 and 35-C33 that have been modified under FAA Supplemental Type Certificate No. SA 2219 WE. (Applicability)\n- Maintenance organisations and parts suppliers who carry out the work or supply the replacement parts. (Applicability; Requirement)\n\nWhy this matters (official statement and limits of the source)\n\n- The instrument refers to FAA airworthiness directive No. 75-15-08 as the basis for the action but does not itself describe the underlying hazard. (Note)\n- Mechanically, it mandates replacing part P/No. 1000-1 with one of P/No. B-1114-M, B-1114-RM or 1000-1 RM. That action is intended to address whatever condition the FAA AD identified. (Requirement; Note)\n\nCosts, incentives and trade-offs (source-grounded analysis)\n\n- Who pays: aircraft owners/operators must pay for the replacement parts and labour to remove and install the specified components. (Requirement; Compliance)\n- Timing and operational cost: the work must be completed within a finite flying-time window (100 hours TIS after 28 November 1975), which creates a scheduling requirement and potential aircraft downtime. (Compliance)\n- Supply and competition effects: the instrument limits acceptable replacements to three specific part numbers. That concentrates demand on the manufacturers/suppliers of those parts and restricts owners from choosing other alternative parts. This affects purchasing options and may affect price and availability. (Requirement)\n- Implementation burden: operators must determine whether their aircraft are within the stated applicability (i.e. have the FAA STC modification) before complying, which imposes a record-checking step. (Applicability)\n- Enforcement and discretion: the directive specifies mandatory actions and a deadline; it leaves little regulatory discretion about what to install or when beyond the stated compliance window. (Requirement; Compliance)\n- Concentrated benefit, diffuse cost pattern: the beneficiaries (parts manufacturers and maintenance providers who supply/install the approved parts) stand to gain concentrated business; aircraft owners bear the direct and dispersed cost of parts, labour and downtime. (Requirement; Compliance)\n\nImplementation risks and practical points\n\n- The directive does not describe technical installation steps, certification paperwork, or who may perform the work; those practical details are typically handled by maintenance organisations following standard procedures. (Requirement)\n- The directive references an FAA AD for the underlying justification but provides no technical rationale in this text; operators must consult the FAA AD or maintenance instructions for details about the condition being addressed. (Note)\n\nConcise statement of obligations\n\n- If an affected aircraft (see Applicability) has the Beryl Aviation filtrator assembly P/No. 1000-1 installed, the owner/operator must remove it and install one of the listed replacement parts before exceeding 100 hours time-in-service after 28 November 1975. (Applicability; Requirement; Compliance)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1975. It addresses one specific defective part on specific aircraft models. There is no evidence of scope creep; it remains tightly focused on its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined model variants in applicability section","Single, unambiguous requirement with no conditional logic or exceptions","No cross-references to other legislation beyond a single FAA AD note","Simple compliance deadline (fixed date + hours-in-service threshold)","No interpretation section or defined terms"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Beechcraft Debonair/Bonanza aircraft** (models 35-33, 35-A33, 35-B33, and 35-C33) that have been modified with a particular engine crankcase breather and air-oil separator system.\n\n**What it requires:**\n- **Remove** a specific part called the \"Beryl Aviation filtrator assembly\" (part number 1000-1)\n- **Replace it** with one of three approved alternatives: part numbers B-1114-M, B-1114-RM, or 1000-1 RM\n\n**Why it matters:**\nThis directive addresses a safety issue with the original filtrator assembly. The FAA (American aviation regulator) issued a similar directive (AD 75-15-08), suggesting this was a known defect that could affect engine performance or safety. Aircraft owners/operators had to complete this replacement within **100 hours of flight time** after 28 November 1975.\n\n**Who it affects:**\n- Owners and operators of the specified Beechcraft models\n- Maintenance organisations servicing these aircraft\n- Anyone with a stake in airworthiness compliance for these particular modified aircraft"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly","history":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly/history","analysis":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly/analysis","conflicts":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly/conflicts","importantCases":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly/important-cases","documents":"/api/acts/ad-beech-33-23-beryl-aviation-filtrator-assembly/documents"}}