{"id":"F2006L01672","name":"AD/B737/31 - Fuselage - Longitudinal Lap Joint Lower Skin at Left and Right Stringer 14 - CANCELLED","slug":"ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59403,"registerId":"commonwealth-F2006L01672-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/31 - Fuselage - Longitudinal Lap Joint Lower Skin at Left and Right Stringer 14 - CANCELLED","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: AIRCRAFT\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/B737/31.\n\n### Boeing 737 Series Aeroplanes\n\n| AD/B737/31 | Fuselage - Longitudinal Lap Joint  Lower Skin at Left and Right Stringer 14 | 7/2006 |\n| --- | --- | --- |\n\n\n \n\n| Requirement: | CANCELLED. |\n| --- | --- |\n|  | This AD is cancelled on 6 July 2006. |\n| Background: | This Airworthiness Directive is superseded by AD/B737/281. |\n\n\n![](image.001.png)\n\nDavid Villiers  Delegate of the Civil Aviation Safety Authority\n\n23 May 2006\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1338},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a purely administrative cancellation instrument. It does not expand regulatory scope; it simply removes the previous directive from force in favour of a replacement."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Extremely short length (under 150 words)","Only cross-reference is to the superseding directive"],"plain_english_summary":"This document cancels a previous aircraft safety rule (**Airworthiness Directive AD/B737/31**) that applied to Boeing 737 aeroplanes.\n\n**What it did previously:** The old rule required specific inspections or repairs to the fuselage (the main body of the plane), particularly the lower skin at a structural point called \"Stringer 14\" on both sides of the aircraft.\n\n**What happens now:** As of **6 July 2006**, airlines and aircraft operators no longer need to follow that specific rule. Instead, they must comply with a newer replacement directive (**AD/B737/281**), which supersedes this one.\n\n**Who is affected:** Anyone operating Boeing 737 series aircraft in Australia (airlines, charter companies, maintenance organisations).\n\n**Why it matters:** This is an administrative clean-up. It removes outdated maintenance requirements to avoid confusion, ensuring operators follow only the current safety standards rather than overlapping or obsolete rules."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled","history":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled/history","analysis":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled/analysis","conflicts":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled/conflicts","importantCases":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled/important-cases","documents":"/api/acts/ad-b737-31-fuselage-longitudinal-lap-joint-lower-skin-at-left-and-right-stringer-14-cancelled/documents"}}