{"id":"F2006B03230","name":"AD/B747/5 - Flap Installation - Inspection and Modification","slug":"ad-b747-5-flap-installation-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42654,"registerId":"commonwealth-F2006B03230-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/5 - Flap Installation - Inspection and 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)  Boeing 747 Series Aeroplanes\n\n \n\nAD/B747/5 Flap Installation - Inspection and Modification 5/76\n\nApplicability: All models.\n\n \n\nDocument: FAA AD 75-20-05, Amdt. 39-2426.\n\n \n\nCompliance: As detailed in the requirement document.\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":3,"scope_assessment":{"changed":false,"description":"The text provided does not show any change of scope from what the instrument title and contents indicate. The AD applies to all Boeing 747 models and delegates technical requirements to FAA AD 75-20-05. No amendment to that applicability or expansion/reduction of scope is evident in the extract."},"complexity_factors":["Reference to an external detailed requirement document (FAA AD 75-20-05) rather than containing technical detail within the instrument","Applicability to an entire aircraft family (all Boeing 747 models) increases operational reach","Lack of timing, procedural and compliance-detail in the text provided (operators must consult another document)","Cross-jurisdictional reliance on a foreign authority's AD (FAA) for technical specification","Practical compliance impacts (inspection/modification work, downtime, parts and labour) depend on the content of the external document"],"plain_english_summary":"This Airworthiness Directive requires operators and owners of all Boeing 747 models to carry out inspections and any required modifications to flap installation, as specified by the referenced FAA AD 75-20-05 (Amdt. 39-2426). It delegates technical detail to that FAA document, so affected operators must follow its procedures, bear the costs, and plan for the resulting downtime and compliance administration."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, specific safety directive focused solely on Boeing 747 flap installations. It has not expanded beyond its original purpose; it remains a targeted maintenance requirement referencing an original 1975 FAA directive."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section; relies entirely on external reference (FAA AD 75-20-05)","No conditional logic or nested exceptions within the text itself","Simple structure: applicability, document reference, compliance requirement","All technical detail outsourced to the referenced FAA document"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- Requires owners and operators of **Boeing 747 aircraft** (all models) to inspect and modify the **flap installation** on their planes.\n- Flaps are the large movable surfaces on the wings that extend during takeoff and landing to create more lift at slower speeds.\n\n**Why it matters:**\n- Flap failures can be catastrophic — if flaps don't deploy properly or fail in flight, an aircraft can lose lift, become uncontrollable, or crash.\n- This directive was issued to address a specific safety defect identified by the US Federal Aviation Administration (FAA).\n\n**Who must comply:**\n- Anyone operating a Boeing 747 in Australia must follow the inspection and modification procedures detailed in the referenced US document (FAA AD 75-20-05).\n\n**Key point:** This isn't optional. Airworthiness Directives are legally binding. If you don't comply, you cannot legally fly the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification","history":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification/history","analysis":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification/analysis","conflicts":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification/important-cases","documents":"/api/acts/ad-b747-5-flap-installation-inspection-and-modification/documents"}}