{"id":"F2006B08791","name":"AD/DC3/14 Reissue - Fuel Tank Filler Cap - Modification","slug":"ad-dc3-14-reissue-fuel-tank-filler-cap-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52137,"registerId":"commonwealth-F2006B08791-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC3/14 Reissue - Fuel Tank Filler Cap - 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)  Douglas DC3 Series Aeroplanes\n\n \n\n# AD/DC3/14\n\nReissue\n\nApplicability: All models.\n\n# Fuel Tank Filler Cap - Modification 1/84\n\n \n\nRequirement: 1. Provide a water-tight cover over each of the four fuel tank filler cap wells.\n\n \n\nThe cover shall consist of a water-tight cap or lid, which may be opened to give unobstructed access to the fuel filler cap, hinged on a suitable mounting. The mounting shall make a water-tight seal with the wing skin.\n\n \n\nCompliance: Unless already accomplished, within 100 hours after 29 February 1984. Background:  This Directive is reissued with no changes made to the requirement.\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":1,"scope_assessment":{"changed":false,"description":"This is a straightforward reissue of an existing airworthiness directive with no changes to scope. The directive maintains its original narrow purpose: requiring a specific physical modification to prevent water ingress in DC-3 fuel systems."},"complexity_factors":["Single, straightforward mechanical requirement (add water-tight hinged covers)","No defined terms section","No cross-references to other legislation or regulations","No conditional logic or exceptions","Extremely short (under 200 words of substantive content)","Clear, unambiguous compliance deadline"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it requires:** All Douglas DC-3 aircraft must be modified to add water-tight covers over their four fuel tank filler cap openings. These covers must:\n- Be hinged lids that can open to allow access to the fuel caps\n- Form a water-tight seal where they attach to the wing\n\n**Who it affects:** Owners and operators of all Douglas DC-3 series aeroplanes.\n\n**Why it matters:** Water entering fuel tanks can cause engine failure, corrosion, or other serious safety hazards. This directive prevents water contamination by sealing the filler cap wells.\n\n**When compliance was required:** Within 100 hours of flying time after 29 February 1984 (unless already done).\n\n**Note:** This is a \"reissue\" — meaning CASA republished the same directive without changing the actual safety requirement."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive was reissued \"with no changes made to the requirement\" (Background). The scope remains the same as the original: all DC-3 models must have a water-tight hinged cover over each of the four fuel tank filler cap wells, installed within the stated compliance window."},"complexity_factors":["Narrow technical scope limited to a single mechanical modification (Requirement).","Clear, prescriptive installation outcome (hinged, water-tight cover sealing to wing skin) reduces interpretive complexity (Requirement).","Short, fixed compliance deadline (100 hours after 29 February 1984) concentrates implementation timing (Compliance).","No alternative compliance methods, waivers, or reporting procedures described in the text, reducing procedural complexity but increasing uniformity of action required (Requirement).","Applies to all models of the type without model-specific deviations, simplifying applicability but increasing aggregate burden (Applicability)."],"plain_english_summary":"All Douglas DC‑3 series aeroplanes must be fitted with hinged, water‑tight covers over each of the four fuel‑tank filler cap wells that seal to the wing skin but allow unobstructed access when opened. Aircraft owners/operators must complete the modification within 100 flying hours after 29 February 1984 and bear parts, labour and downtime costs; maintenance shops and parts suppliers will carry out the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification","history":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification/history","analysis":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification/analysis","conflicts":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification/conflicts","importantCases":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification/important-cases","documents":"/api/acts/ad-dc3-14-reissue-fuel-tank-filler-cap-modification/documents"}}