{"id":"F2006B08885","name":"AD/DH 104/7 - Fuselage - Inspection","slug":"ad-dh-104-7-fuselage-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52366,"registerId":"commonwealth-F2006B08885-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/7 - Fuselage - Inspection","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)  \nDH 104 (Dove) Series Aeroplanes\n\nAD/DH 104/7 Fuselage \\- Inspection 8/71\n\nApplicability: All models.\n\nRequirement: 1. Remove the bottom rear wing root fairings around the port and starboard rear spar attachment fittings and inspect the fuselage skin for buckling in those areas.\n\n    2. Release the appropriate inspection panel in the keel and examine the rear spar transverse frames for buckling or other damage on both port and starboard sides.\n\n    3. Remove the rear cabin heater ducts and run the fingers down the double frame inside the fuselage, from the lower window rail to the floor between windows Nos. 3 and 4 (numbering from the front) and feel for buckling. Pay particular attention to the area on both sides from the floor level to approximately 15 inches above it.\n\n    4. If buckling has occurred, repair the fuselage to the satisfaction of the Secretary before further flight.\n\nCompliance: For Paras. 1 and 2 \\- At intervals not exceeding 300 hours time in service.\n\nFor Paras. 1, 2 and 3 \\- Before further flight after a heavy landing.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument, as written, applies to all DH 104 models and sets inspection/repair requirements and intervals. The text contains no indication that its scope has been expanded or narrowed compared with an earlier baseline; no internal material shows a scope change."},"complexity_factors":["Narrow technical scope limited to fuselage buckling inspections on DH 104 series (Applicability; Requirement)","Prescriptive physical tasks (remove fairings/ducts, palpate frames) that are operationally straightforward but labour‑intensive (Requirement paras.1–3)","Fixed compliance interval (300 hours) plus event‑driven inspection after heavy landings imposes recurring and ad hoc costs (Compliance)","Decision point vested in the Secretary for repair acceptance introduces administrative discretion (Requirement para.4)","Subjective inspection method (‘feel for buckling’) can create variation in findings and potential rework or dispute (Requirement para.3)"],"plain_english_summary":"This directive requires operators of DH 104 (Dove) aeroplanes to remove specified fairings and heater ducts, inspect defined fuselage locations for buckling, and repair any damage to the Secretary’s satisfaction before further flight; routine inspections are mandated every 300 flight hours and after any heavy landing (Requirement paras.1–4; Compliance). Operators pay for the work, the Secretary decides whether repairs are acceptable, and aircraft may be grounded until defects are fixed."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific technical maintenance directive for a single aircraft type (DH 104 Dove). It has not expanded beyond its original purpose of ensuring structural integrity through mandated inspections. The scope remains tightly focused on fuselage inspection requirements as originally intended."},"complexity_factors":["Very short document (under 300 words)","Only 4 specific procedural requirements with clear sequential numbering","Single defined term ('Secretary' — standard reference to the relevant government official)","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Simple conditional logic: only one trigger condition (buckling found) requiring one action (repair before flight)","Plain language instructions using physical descriptions ('run the fingers down', 'pay particular attention') rather than technical legal drafting"],"plain_english_summary":"This AD mandates regular inspections of DH 104 Dove fuselage areas for buckling — around the rear wing attachments, rear spar frames in the keel, and the double frame between windows 3 and 4 — every 300 flight hours and immediately after any heavy landing. If buckling is found, repairs require approval by the Secretary before further flight. It applies to all operators and maintainers of DH 104 Dove aircraft in Australia to protect structural integrity and flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-7-fuselage-inspection","history":"/api/acts/ad-dh-104-7-fuselage-inspection/history","analysis":"/api/acts/ad-dh-104-7-fuselage-inspection/analysis","conflicts":"/api/acts/ad-dh-104-7-fuselage-inspection/conflicts","importantCases":"/api/acts/ad-dh-104-7-fuselage-inspection/important-cases","documents":"/api/acts/ad-dh-104-7-fuselage-inspection/documents"}}