{"id":"F2006B03225","name":"AD/B747/44 Amdt 1 - Inboard Elevator Control Rods and Aft Quadrant","slug":"ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42623,"registerId":"commonwealth-F2006B03225-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/44 Amdt 1 - Inboard Elevator Control Rods and Aft Quadrant","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 747 Series Aeroplanes\n\n \n\nAD/B747/44\n\nAmdt 1\n\n\nInboard Elevator Control Rods and Aft Quadrant 2/91\n\n \n\nApplicability: Model 747 Line Numbers 001 through 635.\n\n \n\nRequirement: Action in accordance with the technical Requirements of FAA AD 90-25-10 Amdt 39-6822.\n\n \n\nNote: Boeing Alert SB 747-27A2253 Rev 4 refers.\n\n \n\nCompliance: As specified in the Requirement Document with effective date of 7 January 1991.\n\n \n\nBackground: Country of origin AD. Amendment 1 references latest FAA AD 90-25-10 as requirement document, this superseded previous relevant FAA AD. Specifies effective line numbers of aircraft.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 updates the Australian AD to adopt the latest FAA AD 90-25-10 Amendment 39-6822 as the mandatory Requirement Document and clarifies the aircraft covered by specifying Model 747 line numbers 001 through 635 (Requirement; Applicability; Background). It therefore changes the prior instrument by superseding the earlier FAA AD reference and by fixing the effective Requirement Document date of 7 January 1991 (Compliance; Background)."},"complexity_factors":["Direct cross-reference to an external FAA Airworthiness Directive (FAA AD 90-25-10 Amdt 39-6822) rather than containing full technical instructions within the Australian AD (Requirement).","Reference to a manufacturer service bulletin (Boeing Alert SB 747-27A2253 Rev 4) which operators must obtain and follow (Note).","Applicability limited to a specific subset of Model 747 aircraft by line number (001–635), requiring operators to confirm line-number eligibility (Applicability).","Compliance timing is tied to the effective date of the external Requirement Document (7 January 1991), so reading the external document is necessary to determine exact timing (Compliance).","Amendment updates a prior AD and thus requires comparison with the superseded AD to determine what changed (Background)."],"plain_english_summary":"This AD makes FAA AD 90-25-10 (Amendment 39-6822) mandatory in Australia for Boeing 747 aeroplanes line numbers 001–635, requiring operators to carry out the inspection and corrective actions for inboard elevator control rods and the aft quadrant as set out in the FAA AD and Boeing Alert Service Bulletin SB 747-27A2253 Rev 4. \n\nIt affects aircraft owners, operators and maintenance organisations, who must follow the FAA’s schedules and bear the costs of inspections, parts and repairs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard amendment to an existing airworthiness directive. Amendment 1 simply updates the reference to the latest FAA directive and clarifies the affected aircraft line numbers. The scope remains tightly focused on the original safety issue (elevator control rods and aft quadrant) and has not expanded beyond this specific mechanical inspection/repair requirement."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly used ('line numbers' referring to aircraft serial numbers)","No nested conditional logic or exceptions","Single cross-reference to external FAA document (AD 90-25-10) and Boeing service bulletin","Straightforward applicability criteria (specific line number range)","No internal definitions section or interpretation clauses"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or inspections on certain Boeing 747 aircraft.\n\n**What it does:** It orders owners and operators of Boeing 747 aeroplanes (specifically those built as line numbers 001 through 635) to inspect and fix problems with the **inboard elevator control rods and aft quadrant** — critical parts of the tail that help control the plane's pitch (up and down movement).\n\n**Why it matters:** These control rods and quadrants are essential for the pilot to control the aircraft's altitude. If they fail, the pilot could lose control of the plane's nose position, creating a serious safety risk. This directive ensures these components meet current safety standards.\n\n**What must be done:** Aircraft operators must follow the technical requirements set out in a US Federal Aviation Administration (FAA) directive (AD 90-25-10). This amendment (Amendment 1) updates the Australian directive to reference the latest US safety requirements and clarifies exactly which aircraft serial numbers (line numbers) are affected.\n\n**Who it affects:** Operators of early-model Boeing 747s (roughly the first 635 aircraft built)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant","history":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant/history","analysis":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant/analysis","conflicts":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant/conflicts","importantCases":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant/important-cases","documents":"/api/acts/ad-b747-44-amdt-1-inboard-elevator-control-rods-and-aft-quadrant/documents"}}