{"id":"F2006B08867","name":"AD/DH 104/25 Amdt 1 - Flap Datum Hinge Assembly - Inspection","slug":"ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52067,"registerId":"commonwealth-F2006B08867-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/25 Amdt 1 - Flap Datum Hinge Assembly - Inspection","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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/25\n\nAmdt 1\n\n\nFlap Datum Hinge Assembly - Inspection 7/70\n\n \n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS CT(104) No. 216 Issue 2.\n\n \n\nCompliance: For Para. 4.1 - Within 25 hours time in service after 20 July 1970.\n\n \n\nFor Paras. 4.2 and 4.3 - In accordance with 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical component of a specific aircraft type. It has not expanded beyond its original purpose of ensuring flap hinge assembly integrity on DH 104 aircraft."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 operative paragraphs: applicability, document reference, and two compliance deadlines","No defined terms section — relies entirely on external technical document","No conditional logic or nested exceptions","Single cross-reference to external technical standard (Hawker Siddeley TNS CT(104) No. 216 Issue 2)","Straightforward temporal compliance requirement (25 hours time in service after fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of **DH 104 (Dove) series aeroplanes** — a British twin-engine aircraft from the 1940s-60s — to inspect the **flap datum hinge assembly**. This is a critical part of the wing flap system that helps control the aircraft during takeoff and landing.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains any model of the DH 104 Dove aircraft.\n\n**What must be done:**\n- **Initial inspection:** Within 25 hours of flying time after 20 July 1970, operators must complete the inspection described in paragraph 4.1 of the referenced technical document.\n- **Ongoing requirements:** Additional inspections or actions described in paragraphs 4.2 and 4.3 must be followed according to the schedule in the technical document (Hawker Siddeley TNS CT(104) No. 216 Issue 2).\n\n**Why it matters:**\nAirworthiness Directives are legally binding. If operators don't comply, the aircraft cannot legally fly. This particular directive addresses potential safety defects in the flap hinge assembly that could affect flight control. The \"Amdt 1\" indicates this is an amended version of an earlier directive, likely updating the requirements based on new safety information."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is labeled \"Amdt 1\", indicating it amends a prior AD/DH 104/25. The excerpt does not state what the original wording was or what was altered. The present text applies the requirement to all DH 104 models and sets compliance timing and a reference technical document; the amendment status shows a change from an earlier version, but the nature and extent of that change are not specified in this excerpt."},"complexity_factors":["Short and narrowly focused directive text","Cross-reference to an external technical document for procedural detail (Hawker Siddeley TNS CT(104) No. 216 Issue 2)","Specific, tight compliance timing for Para. 4.1 (25 hours time in service after a fixed date)","Applicability covers all models of the DH 104 series, increasing the population affected","Lack of in-text rationale, penalties, or procedural detail requiring users to access another document"],"plain_english_summary":"This airworthiness directive requires operators of all DH 104 (Dove) aircraft to inspect the flap datum hinge assembly, with the inspection procedures and any follow‑up actions specified in Hawker Siddeley TNS CT(104) No.216 Issue 2. One inspection task must be done within 25 hours TIS after 20 July 1970; operators arrange and pay for the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection","history":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection/history","analysis":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection/analysis","conflicts":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection/conflicts","importantCases":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection/important-cases","documents":"/api/acts/ad-dh-104-25-amdt-1-flap-datum-hinge-assembly-inspection/documents"}}