{"id":"F2006B11189","name":"AD/LUSCOMBE/1 - Vertical Stabiliser Fitting","slug":"ad-luscombe-1-vertical-stabiliser-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56894,"registerId":"commonwealth-F2006B11189-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LUSCOMBE/1 - Vertical Stabiliser Fitting","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)  \nLuscombe Model 8 Series Aeroplanes\n\nAD/LUSCOMBE/1 Vertical Stabiliser Fitting 11/94\n\nApplicability: All Model 8 Series aircraft that have round-tipped vertical stabiliser installations.\n\nRequirement: Replace the aluminium vertical stabiliser forward attach fitting, Luscombe part number 28415, 28444, or 28453, with either a Luscombe part number 28455 fitting manufactured by the Don Luscombe Aviation History Foundation (DLAHF); a welded steel fitting manufactured by the Univair Aircraft Corporation, part number U28444; or an FAA approved part.\n\nAccomplish this replacement in accordance with the procedures included in DLAHF Service Recommendation #1, dated November 28, 1993.\n\nNote: FAA AD 94-16-02 Amdt 39-8991 refers, which supersedes AD 79-25-05 Amdt 39-3630.\n\nCompliance: Unless already accomplished, within 100 hours time in service after 13 October 1994.\n\nBackground: The FAA requires replacement of the aluminium vertical stabiliser forward attach fitting with a steel attach fitting, on aircraft that have round-tipped vertical stabiliser installations. This action is intended to prevent the possible failure of the vertical stabiliser.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains the established requirement to replace the aluminium vertical‑stabiliser forward attach fitting on applicable Model 8 aircraft. It specifies approved replacement parts, mandates use of DLAHF Service Recommendation #1 for the procedure, and sets a 100‑hour compliance window; it also cites a more recent FAA AD that supersedes an earlier FAA AD. These are specification and timing updates rather than a change in the substantive population or corrective action."},"complexity_factors":["Narrow applicability: applies only to Luscombe Model 8 series with round‑tipped vertical stabilisers (straightforward to identify).","Single technical action: replace a specific aluminium fitting with a steel fitting (clear mechanical remedy).","Multiple acceptable replacement options: named DLAHF and Univair parts or any FAA‑approved part (requires verifying part approval).","Procedure dependency: replacement must follow DLAHF Service Recommendation #1 (operators must obtain and comply with that procedure).","Fixed compliance window: 100 hours time in service after a specified date (creates scheduling/operational planning requirement).","Regulatory linkage: references and aligns with FAA ADs (administrative cross‑referencing for compliance history)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Luscombe Model 8 series aeroplanes with round‑tipped vertical stabilisers to replace the aluminium forward attach fitting (Luscombe part 28415, 28444, or 28453) with an approved steel fitting (Luscombe 28455 by DLAHF, Univair U28444, or an FAA‑approved part) following DLAHF Service Recommendation #1. Compliance must be completed within 100 hours time in service after 13 October 1994. The stated safety objective is to prevent possible failure of the vertical stabiliser; owners bear the replacement cost and must source and install an approved part."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical requirement with no conditional logic","Only 3 defined part numbers in the main requirement","Clear, unambiguous compliance deadline (100 hours time in service)","No cross-references to other legislation beyond a single note about related FAA directives","Narrow applicability (single aircraft model series with specific visual characteristic)","Straightforward background explanation with single stated purpose"],"plain_english_summary":"This order requires owners/operators of Luscombe Model 8 aircraft with the original round-tipped tail fin to replace the aluminium vertical stabiliser forward attach fitting with an approved steel fitting (Luscombe 28455, Univair U28444, or FAA‑equivalent). It addresses risk of fitting failure and loss of the fin. Replacement must be done within 100 flight hours after 13 Oct 1994 and follow DLAHF Service Recommendation #1."}},"importantCases":[],"_links":{"self":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting","history":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting/history","analysis":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting/analysis","conflicts":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting/conflicts","importantCases":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting/important-cases","documents":"/api/acts/ad-luscombe-1-vertical-stabiliser-fitting/documents"}}