{"id":"F2006L01106","name":"AD/B747/340 - Fuselage Main Frame","slug":"ad-b747-340-fuselage-main-frame","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58461,"registerId":"commonwealth-F2006L01106-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/340 | Fuselage Main Frame | 5/2006 |\n| ----------- | ------------------- | ------ |\n\n| Applicability: | Model 747-200F, -200C, -400, -400D, -400F series aircraft.                                                                                                                                               |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2006-05-02Amdt 39-14499.Note: Boeing Alert Service Bulletin 747-53A2500, or later FAA approved revision, refers.                          |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of11 May 2006.                                                                                                                   |\n|                | This Airworthiness Directive becomes effective on 11 May 2006.                                                                                                                                           |\n| Background:    | The FAA requires repetitive inspections for cracking of certain fuselage internal structure, which results from fatigue tests and analysis that identified areas of the fuselage where cracks can occur. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n31 March 2006","sortOrder":0},{"sectionNumber":"AD/B747/340","sectionType":"part","heading":"AD/B747/340","content":"## AD/B747/340","sortOrder":1},{"sectionNumber":"Fuselage Main Frame","sectionType":"part","heading":"Fuselage Main Frame","content":"## Fuselage Main Frame","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1734},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains focused on its original purpose: mandating repetitive inspections for fuselage main frame cracking on specified Boeing 747 models. No expansion of scope beyond this specific airworthiness safety issue."},"complexity_factors":["Very short, single-issue directive with no interpretation section","Contains only 5 specific aircraft model references as defined applicability","Relies entirely on incorporation by reference to external technical documents (FAA AD and Boeing Service Bulletin) for actual inspection procedures","No conditional logic, exceptions, or nested provisions within the directive text itself"],"plain_english_summary":"**What this is:** A mandatory safety notice (Airworthiness Directive) requiring airlines and aircraft owners to inspect specific Boeing 747 aircraft for dangerous cracks in the fuselage (the main body of the plane).\n\n**Who it affects:** Owners and operators of Boeing 747-200F, -200C, -400, -400D, and -400F series aircraft.\n\n**What must be done:** Aircraft must undergo repetitive inspections of the internal fuselage structure to detect cracks, following the technical rules set out in American aviation safety notice **FAA AD 2006-05-02** and **Boeing Alert Service Bulletin 747-53A2500**.\n\n**Why it matters:** Fatigue testing revealed that certain areas of the fuselage main frame can develop cracks over time. Without these inspections, structural failures could occur, potentially endangering the aircraft and passengers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-340-fuselage-main-frame","history":"/api/acts/ad-b747-340-fuselage-main-frame/history","analysis":"/api/acts/ad-b747-340-fuselage-main-frame/analysis","conflicts":"/api/acts/ad-b747-340-fuselage-main-frame/conflicts","importantCases":"/api/acts/ad-b747-340-fuselage-main-frame/important-cases","documents":"/api/acts/ad-b747-340-fuselage-main-frame/documents"}}