{"id":"F2008L00601","name":"AD/B747/34 Amdt 4 - Supplemental Structural Inspection Program","slug":"ad-b747-34-amdt-4-supplemental-structural-inspection-program","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119574,"registerId":"commonwealth-F2008L00601-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","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/B747/34 Amdt 4 | Supplemental Structural Inspection Program | 3/2008 |\n| ----------------- | ------------------------------------------ | ------ |\n\n| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SR, and 747SP series aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2004-07-22 R1 Amdt 39-15326.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Amendment becomes effective on 13 March 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| Background:    | The Supplemental Structural Inspection Document has been produced to ensure the continued structural integrity of older Model 747 aircraft and, through follow-on action, to maintain the structural airworthiness of the whole Model 747 fleet.Amendment 2 introduced the latest revision of the Requirement document.Amendment 3 required additional and expanded inspections, and expanded applicability to include additional aircraft.Amendment 4 is issued in response to a revision of the related FAA AD, which clarifies the applicability of the existing AD by specifying which Model 747 aircraft are affected, because certain new variants that have not yet been certified would have been subject to the requirements of this Directive. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2008","sortOrder":0},{"sectionNumber":"AD/B747/34 Amdt 4","sectionType":"part","heading":"AD/B747/34 Amdt 4","content":"## AD/B747/34 Amdt 4","sortOrder":1},{"sectionNumber":"Supplemental Structural Inspection Progr","sectionType":"part","heading":"Supplemental Structural Inspection Program","content":"## Supplemental Structural Inspection Program","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 4 narrows and clarifies applicability by specifying which Model 747 aircraft are affected, to avoid unintentionally capturing new variants that are not yet certified (Background). This changes scope from prior text that could have applied to uncertified variants."},"complexity_factors":["Cross-reference to an external FAA airworthiness directive for technical requirements (Requirement) — the detailed inspection regime is not reproduced in this instrument, increasing implementation dependence on another document.","Broad and multiple-model applicability list (Applicability) — many 747 variants are covered, requiring operators to check variant-specific applicability.","Amendment history and incremental changes (Background) — prior amendments introduced revisions, expanded inspections and applicability, creating layered obligations to track.","Compliance mechanics delegated to the Requirement document (Compliance) — compliance timing and procedures are specified elsewhere, which raises administrative burden for operators to obtain and follow that document.","Scope clarification element (Background) — this amendment refines which variants are affected, so implementers must compare certification status and variant specifics."],"plain_english_summary":"This amendment makes compliance with the FAA’s Supplemental Structural Inspection Program mandatory for the listed Boeing 747 variants by adopting the technical actions of FAA AD 2004-07-22 R1. It takes effect from 13 March 2008. Operators and owners must fund and carry out required inspections and accept associated downtime; the Civil Aviation Safety Authority (via its Delegate) enforces compliance. The instrument’s stated purpose is to preserve the structural integrity of older 747s; it relies on an external FAA document for the technical inspection regime."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The legislation maintains its original narrow purpose: mandating supplemental structural inspections for aging Boeing 747 aircraft. Amendment 4 is a technical clarification only — it narrows applicability slightly to exclude uncertified variants, but does not expand the directive's scope beyond airworthiness inspections."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement: comply with external FAA document","No defined terms section — relies entirely on external technical reference","No conditional logic or nested exceptions in the text itself","Simple amendment history (4 versions, each with clear purpose)","Single applicability table with straightforward aircraft model list"],"plain_english_summary":"This AD mandates additional structural inspections for older Boeing 747 variants (‑100/‑200/‑300/‑400, SR, SP) to detect cracks, corrosion, or fatigue beyond routine maintenance. It affects owners, operators, and maintenance organizations that service these aircraft. Amendment 4 simply corrects which 747 models are covered so newer, not-yet-certified variants aren’t unintentionally included, preserving fleet safety as airframes age."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program","history":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program/history","analysis":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program/analysis","conflicts":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program/conflicts","importantCases":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program/important-cases","documents":"/api/acts/ad-b747-34-amdt-4-supplemental-structural-inspection-program/documents"}}