{"id":"F2006L01669","name":"AD/B747/271 - Horizontal Stabiliser Centre Section and Rear Spar Upper Chord - CANCELLED","slug":"ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59397,"registerId":"commonwealth-F2006L01669-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series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/B747/271 | Horizontal Stabiliser Centre Section and Rear Spar Upper Chord | 7/2006 |\n| ----------- | -------------------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                  |\n| ------------ | --------------------------------------------------------------------------- |\n|              | This AD is cancelled on 6 July 2006.                                        |\n| Background:  | The requirements of this Directive are now contained in AD/B747/294 Amdt 1. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 May 2006","sortOrder":0},{"sectionNumber":"AD/B747/271","sectionType":"part","heading":"AD/B747/271","content":"## AD/B747/271","sortOrder":1},{"sectionNumber":"Horizontal Stabiliser Centre Section and","sectionType":"part","heading":"Horizontal Stabiliser Centre Section and Rear Spar Upper Chord","content":"## Horizontal Stabiliser Centre Section and Rear Spar Upper Chord","sortOrder":2},{"sectionNumber":"7/2006","sectionType":"part","heading":"7/2006","content":"## 7/2006","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2140},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a routine administrative consolidation by cancelling superseded requirements and redirecting to a replacement directive. It does not expand the regulatory scope beyond the original airworthiness safety purpose."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","Minimal cross-referencing (single reference to replacement directive AD/B747/294)","No conditional logic or exceptions"],"plain_english_summary":"This Airworthiness Directive (AD) **cancels a previous safety rule** for Boeing 747 aircraft.\n\n**What it does:**\n*   **Cancels** the earlier version of AD/B747/271, effective 6 July 2006. The original directive required inspections or maintenance of the *horizontal stabiliser centre section* and *rear spar upper chord* (critical structural parts at the tail of the aircraft).\n*   **Redirects operators** to the replacement rule: **AD/B747/294 Amendment 1**, which now contains these safety requirements in an updated form.\n\n**Who it affects:**\nOwners and operators of Boeing 747 series aeroplanes.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions issued by the Civil Aviation Safety Authority (CASA). This cancellation means operators must stop using the old directive and follow the requirements in the newer consolidated directive (AD/B747/294 Amdt 1) instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled","history":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled/history","analysis":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled/analysis","conflicts":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled/conflicts","importantCases":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled/important-cases","documents":"/api/acts/ad-b747-271-horizontal-stabiliser-centre-section-and-rear-spar-upper-chord-cancelled/documents"}}