{"id":"F2006B08888","name":"AD/DH 60/1 - Compression Leg Tie-Rod - Inspection","slug":"ad-dh-60-1-compression-leg-tie-rod-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52375,"registerId":"commonwealth-F2006B08888-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 60/1 - Compression Leg Tie-Rod - 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)  De Havilland DH 60 (Moth) Series Aeroplanes\n\n \n\nAD/DH 60/1 Compression Leg Tie-Rod - Inspection 11/67\n\nApplicability: All model DH60G and DH60M.\n\n \n\nRequirement:  1. Inspect the nut at the lower end of the tie-rod and ensure that it is a standard 1/4 in. BSF slotted type and that all the threads in the nut and on the rod are in serviceable condition.\n\n \n\n2.    The tie-rod shall be of sufficient length to receive the full depth of the nut; no reduction of the nut is permissible.\n\n \n\n3.    Also inspect the upper end of the tie-rod and ensure that the head formed by riveting is sufficiently tight against the piston to prevent it form loosening during operation. or\n\n \n\n4.    Part 100, Appendix “A” Notice no 6/4. or 5. ANO 105.1.14.2.6.1.\n\nCompliance: Forthwith\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1754},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive remains tightly scoped to its original 1967 purpose: mandating inspection of a specific mechanical component on specific De Havilland aircraft models. It has not expanded beyond this targeted safety-critical maintenance requirement."},"complexity_factors":["Specialised aviation engineering terminology (BSF threads, compression legs, tie-rods) requiring technical knowledge to interpret","Cross-references to three alternative compliance documents (ANO 105.1.14.2.6.1, Part 100 Appendix A, Notice 6/4)","Precise dimensional specifications (1/4 inch) and manufacturing standards","Extremely narrow applicability limited to two specific vintage aircraft models manufactured nearly a century ago"],"plain_english_summary":"Owners of vintage De Havilland Moth DH60G/DH60M aircraft must immediately inspect compression leg tie‑rods in the landing gear. Checks ensure the bottom nut is a standard 1/4\" BSF slotted type with undamaged threads, the rod is long enough for full nut engagement, and the top riveted head is tight. Alternative compliance may follow ANO 105.1.14.2.6.1 or Part 100 Appendix A Notice 6/4."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection","history":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection/history","analysis":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection/analysis","conflicts":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection/conflicts","importantCases":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection/important-cases","documents":"/api/acts/ad-dh-60-1-compression-leg-tie-rod-inspection/documents"}}