{"id":"F2006B08824","name":"AD/DC4/19 - Control Surface Bonding - Revision","slug":"ad-dc4-19-control-surface-bonding-revision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52254,"registerId":"commonwealth-F2006B08824-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC4/19 - Control Surface Bonding - Revision","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 DC4 Series Aeroplanes\n\n \n\n \n\n| AD/DC4/19 | Control Surface Bonding - Revision | NK |\n| --- | --- | --- |\n| Document: | 1. Douglas SB (DC4) No. 82, dated 27 December 1948; or |  |\n|  | 2. ANO 105.1.16.2.5.18. |  |\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 \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":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The instrument is labelled a \"Revision\" (AD/DC4/19 - Control Surface Bonding - Revision), which indicates it modifies a prior directive. The supplied excerpt does not include the prior text or the revised operative provisions, so the exact nature or extent of the scope change cannot be determined from this excerpt alone. The revision is signalled, but specifics must be read in the full AD or referenced documents (Douglas SB No. 82 or ANO 105.1.16.2.5.18)."},"complexity_factors":["Very short excerpt with no operative compliance text or deadlines included","Reliance on external historical technical document (Douglas SB No. 82, 1948) for substantive requirements","Cross-reference to an ANO provision (ANO 105.1.16.2.5.18) rather than reproducing requirements","Labelled as a “Revision” but without comparative text showing what changed","Applies to a specific aircraft type (Douglas DC4 series), narrowing scope but requiring aircraft-specific technical work"],"plain_english_summary":"AD/DC4/19 is a revised Airworthiness Directive for Douglas DC‑4 series aeroplanes addressing control‑surface bonding. It points operators and maintenance organisations to Douglas Service Bulletin No. 82 (27 Dec 1948) or ANO 105.1.16.2.5.18 as the authoritative technical guidance. The entry signals required action by owners/operators but contains no timing, costs, or compliance details—those must be read in the referenced documents or the full AD text."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This appears to be a standard airworthiness directive maintaining the original scope of aircraft safety requirements for the DC-4. As a revision, it likely clarifies or updates compliance methods without expanding beyond the original safety purpose."},"complexity_factors":["Extremely short document — essentially a table entry with metadata","Only 2 substantive references to external technical documents","No defined terms section","No conditional logic or nested exceptions","Single operational requirement (control surface bonding)","Minimal legislative text — mostly formatting and document identifiers"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** for **Douglas DC-4 aircraft** — a type of four-engine propeller plane that first flew in the 1940s.\n\n**What it does:**\nThis directive requires owners and operators of DC-4 aeroplanes to ensure proper **electrical bonding** of the control surfaces. \"Bonding\" means creating a reliable electrical connection between metal parts of the aircraft. This prevents dangerous static electricity buildup that could interfere with radio equipment or cause sparks.\n\n**Who it affects:**\n- Owners and operators of Douglas DC-4 series aircraft\n- Maintenance organisations servicing these planes\n- The Civil Aviation Safety Authority (CASA), which enforces compliance\n\n**Why it matters:**\nPoor electrical bonding can cause:\n- Radio interference (static on communications)\n- Potential fire hazards from electrical arcing\n- Loss of reliable control surface operation\n\nThe directive references two technical documents that provide the specific instructions for compliance: a 1948 Douglas service bulletin and an older Air Navigation Order.\n\n**Key point:** This is a **revision** of an existing directive, meaning it updates or replaces a previous version of the same safety requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc4-19-control-surface-bonding-revision","history":"/api/acts/ad-dc4-19-control-surface-bonding-revision/history","analysis":"/api/acts/ad-dc4-19-control-surface-bonding-revision/analysis","conflicts":"/api/acts/ad-dc4-19-control-surface-bonding-revision/conflicts","importantCases":"/api/acts/ad-dc4-19-control-surface-bonding-revision/important-cases","documents":"/api/acts/ad-dc4-19-control-surface-bonding-revision/documents"}}