{"id":"F2023L00952","name":"AD/LUB/2 Amdt 2 — Oil Filter Adapters","slug":"ad-lub-2-amdt-2-oil-filter-adapters","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":104597,"registerId":"commonwealth-F2023L00952-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Lubrication Systems","sectionType":"part","heading":"Lubrication Systems","content":"# Lubrication Systems\n\n| AD/LUB/2 Amdt 2 | Oil Filter Adapters | 12/2023 |\n| --------------- | ------------------- | ------- |\n\n| Applicability: | All Teledyne Continental Motors piston engines incorporating a full flow oil filter adapter.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the engine oil filter adapter for security, oil leaks and effective locking.2. Remove and inspect the oil filter adapter, adapter nut and 'O' ring, spool, sleeve and gaskets, as applicable.3. Install a new ‘O’ ring or gaskets, as applicable.                                                                                                                                                                                                                                                                                                                                                                                         |\n| Compliance:    | 1. At each aircraft periodic, annual, or 100-hour inspection, as applicable.2. Whenever the oil filter adapter and/or adapter hardware is found to be loose, whenever the oil filter adapter angle is reoriented for whatever reason or when oil is detected leaking from the adapter assembly.3. Any time the adapter is removed, adjusted, loosened, or repaired.                                                                                                                                                                                                                                                                                  |\n|                | This AD commences on 15 July 2023.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background:    | This directive was originally issued to address reports of engine failure events resulting from the loss of engine oil. The oil loss was found to have resulted from loose and/or leaking oil filter adapters.Amendment 1 of this AD removed the requirement to inspect the oil filter adapter at every oil filter change and became effective on 15 April 2004.Amendment 2 of this AD identifies compatible parts more accurately for the various adapter configurations and expands the compliance statement to identify relevant maintenance schedule inspection thresholds and make the “Note” a requirement to align with Stratus SB-001 Rev C. |\n\n![Delegate signature](image.001.jpeg)  \nDelegate of the Civil Aviation Safety Authority\n\n7 June 2023","sortOrder":0},{"sectionNumber":"AD/LUB/2 Amdt 2","sectionType":"part","heading":"AD/LUB/2 Amdt 2","content":"## AD/LUB/2 Amdt 2","sortOrder":1},{"sectionNumber":"Oil Filter Adapters","sectionType":"part","heading":"Oil Filter Adapters","content":"## Oil Filter Adapters","sortOrder":2},{"sectionNumber":"12/2023","sectionType":"part","heading":"12/2023","content":"## 12/2023","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. Earlier Amendment 1 removed the prior requirement to inspect at every oil filter change; Amendment 2 more precisely identifies compatible parts for different adapter configurations and expands the compliance statement to reference maintenance schedule thresholds and to make the previous Note mandatory to align with Stratus SB‑001 Rev C (Background)."},"complexity_factors":["Broad applicability to all Teledyne Continental Motors piston engines with a full‑flow oil filter adapter (Applicability) — increases the number of affected aircraft and operators.","Multiple compliance triggers (periodic/annual/100‑hour inspections and event‑based triggers such as loosening, reorientation, leakage, or removal) (Compliance) — creates recurring and event-driven inspection scheduling.","Specific disassembly and component checks required (adapter, adapter nut, 'O' ring, spool, sleeve, gaskets) and mandatory replacement of seals as applicable (Requirement) — technical maintenance tasks and parts costs.","Amendment clarifies compatible parts and aligns the directive with Stratus SB‑001 Rev C, including converting a Note into a mandatory requirement (Background) — introduces parts‑identification and conformity considerations.","Effective date and regulatory provenance (commences 15 July 2023; signed by a CASA delegate) — binds operators from a fixed start date and reflects administrative authority."],"plain_english_summary":"This Airworthiness Directive requires regular inspection and, when necessary, removal and replacement of parts of the oil filter adapter (including ‘O’ rings/gaskets) on all Teledyne Continental Motors piston engines that use a full‑flow oil filter adapter. It must be done at periodic, annual or 100‑hour inspections and whenever the adapter is loose, reoriented, leaking, or removed; operators pay for inspections and parts to reduce the risk of oil loss and engine failure."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original directive required inspection at every oil filter change. Amendment 1 (2004) removed that requirement. Amendment 2 (2023) has expanded the scope by: (1) identifying compatible parts more accurately for various adapter configurations, and (2) expanding compliance requirements to explicitly reference standard maintenance schedule inspection thresholds (periodic/annual/100-hour). While the core safety purpose remains unchanged, the directive has evolved from a simple 'inspect at every filter change' rule to a more nuanced system integrated with broader maintenance schedules."},"complexity_factors":["Very short document (approximately 300 words)","Only 3 defined maintenance actions in the Requirement section","Simple conditional logic: 'as applicable' appears 3 times to account for different adapter configurations","No cross-references to other legislation or regulations","Straightforward compliance triggers based on standard maintenance intervals (annual/100-hour inspections) or observable conditions (leaks, looseness)","Background section provides clear rationale without legal caveats"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of aircraft with Teledyne Continental Motors piston engines and full‑flow oil filter adapters to inspect and maintain those adapters. It requires routine checks at periodic/annual/100‑hour inspections and immediate action if adapters are loose, leaking, or disturbed, including removal, inspection and replacement of seals when serviced.\n\nThe AD prevents catastrophic oil loss and engine failures by ensuring adapter integrity and aligns requirements with updated manufacturer guidance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters","history":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters/history","analysis":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters/analysis","conflicts":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters/conflicts","importantCases":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters/important-cases","documents":"/api/acts/ad-lub-2-amdt-2-oil-filter-adapters/documents"}}