{"id":"F2006B08727","name":"AD/DAUPHIN/16 - Fuel Filter","slug":"ad-dauphin-16-fuel-filter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51954,"registerId":"commonwealth-F2006B08727-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/16 - Fuel Filter","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nEurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\nAD/DAUPHIN/16 Fuel Filter 6/86\n\nApplicability: All model SA365N helicopters equipped with LE BOZEC fuel filters P/N 433 G20-2 or P/N 433 G20-2 Amendment A (LH and RH sides).\n\nRequirement: Aerospatiale Service Bulletin No. 01-12. Check the fuel flow at the by-pass valve outlet on LH and RH filters in accordance with para 1c of the requirement document. After satisfactory compliance with the checking instructions the letter\"X\" shall be engraved on the filter body following the Part Number marking.\n\nNote: This AD is not applicable to filters P/N 433G 20 \\-2X, P/N 433 G 20-2 Amendment AX and P/N 433 G 20-2 Amendment B and subsequent.\n\nCompliance: Within 50 hours time in service after 30 June 1986 and thereafter any time a filter of the applicable part number, which is not suffixed with the letter X, is installed.\n\nBackground: A French Airworthiness Directive (86-17-14B) has been issued to check these filters.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive stays within the original targeted scope: it addresses a specific safety concern for particular LE BOZEC filter part numbers on SA365N helicopters, follows a French AD, and explicitly excludes filters already marked or later amended. It does not broaden to additional models, parts, or types of action beyond inspection and marking."},"complexity_factors":["Narrow technical applicability: only SA365N helicopters with LE BOZEC filters P/N 433 G20-2 or P/N 433 G20-2 Amendment A are covered.","Action required references external technical document: inspection must follow Aerospatiale Service Bulletin No. 01-12 (para 1c), creating dependence on that bulletin for execution details.","Simple, discrete tasks: check fuel flow at bypass valve outlet and engrave letter “X” after satisfactory check.","Clear timeframe: compliance within 50 hours time in service after 30 June 1986 and thereafter whenever an unmarked applicable filter is installed.","Explicit exclusions: filters already suffixed with “X” or later amendment parts (433G20-2X, Amendment AX, Amendment B and subsequent) are not subject to the AD.","Operational burden concentrated on operators/maintenance providers: cost and labour of inspections, marking, and possible replacements are borne by aircraft operators.","Repeat-trigger: requirement recurs whenever an applicable unmarked filter is installed, creating ongoing compliance tracking for maintenance.","Regulatory provenance: implements a foreign (French) airworthiness directive, which may limit scope to the specific identified safety concern."],"plain_english_summary":"This airworthiness directive requires operators of SA365N helicopters fitted with specific LE BOZEC fuel filters (P/N 433 G20‑2 or P/N 433 G20‑2 Amendment A) to check the fuel flow at each filter’s bypass valve outlet per Aerospatiale Service Bulletin No. 01‑12 and, if satisfactory, engrave an “X” on the filter body. It applies within 50 hours time in service after 30 June 1986 and whenever an applicable unmarked filter is installed; it implements a French AD addressing potential filter faults, so operators pay for inspections and marking or replacement."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on fuel filter inspection for one helicopter series. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined part numbers in applicability section","Single procedural requirement with clear reference to external document (Service Bulletin)","Simple compliance trigger (time-based with recurring condition)","Explicit exemption list of 3 part numbers in Note section","No nested conditions or cross-references to other legislation"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific helicopters.\n\n**What it requires:** Owners and operators of Eurocopter SA 365N Dauphin helicopters must check the fuel filters on both the left-hand (LH) and right-hand (RH) sides of the aircraft. Specifically, they need to:\n- Check fuel flow at the by-pass valve outlet on both fuel filters\n- Follow the procedure in Aerospatiale Service Bulletin No. 01-12\n- Once the check passes, permanently mark the filter body with an \"X\" after the Part Number\n\n**Who it affects:** Anyone operating SA365N model helicopters that have LE BOZEC fuel filters with specific part numbers (P/N 433 G20-2 or P/N 433 G20-2 Amendment A).\n\n**When to do it:** Within 50 hours of flying time after 30 June 1986, and again whenever you install a new filter of these types that hasn't already been marked with an \"X\".\n\n**Why it matters:** This directive was triggered by a French safety notice about potential fuel filter problems. Fuel system failures in helicopters can cause engine stoppage — obviously catastrophic. The \"X\" marking creates a permanent record that the safety check has been done, so the same filter doesn't get re-checked unnecessarily.\n\n**What's exempt:** Filters with part numbers ending in \"X\" or \"AX\", or \"Amendment B and subsequent\" versions — these are already compliant or were manufactured after the problem was fixed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-16-fuel-filter","history":"/api/acts/ad-dauphin-16-fuel-filter/history","analysis":"/api/acts/ad-dauphin-16-fuel-filter/analysis","conflicts":"/api/acts/ad-dauphin-16-fuel-filter/conflicts","importantCases":"/api/acts/ad-dauphin-16-fuel-filter/important-cases","documents":"/api/acts/ad-dauphin-16-fuel-filter/documents"}}