{"id":"F2006B02672","name":"AD/B727/15 - Nose Landing Gear Lock Actuator Crank - Inspection and Modification","slug":"ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41988,"registerId":"commonwealth-F2006B02672-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/15 - Nose Landing Gear Lock Actuator Crank - Inspection and Modification","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 727 Series Aeroplanes\n\n \n\nAD/B727/15  Nose Landing Gear Lock Actuator Crank - Inspection and Modification\n\n\n1/66\n\n \n\nApplicability: All models.\n\n \n\nDocument: Boeing SB 32-67 (R-1). Compliance: Forthwith.\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\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text as provided does not indicate any change in scope from its stated purpose: it applies to all Boeing 727 models and requires immediate compliance with Boeing SB 32-67 (R-1). There is no information in the text that suggests the scope was altered from an earlier or original intent."},"complexity_factors":["Very short directive text with a single, specific requirement (inspect and modify nose landing gear lock actuator crank).","Mandatory immediate compliance (\"Forthwith\") increases operational urgency despite simple wording.","Technical details are externalised to Boeing SB 32-67 (R-1), creating dependency on an external, potentially technical document.","Applicability is broad (\"All models\"), which raises uniform operational impact across all Boeing 727 operators.","AD does not specify costs, exemptions, enforcement provisions or tolerances, requiring readers to consult regulator practice or the service bulletin for implementation details."],"plain_english_summary":"### What this instrument does\n\nThis is an airworthiness directive issued under the Commonwealth Civil Aviation Regulations (Part 39) that requires inspection and modification of the nose landing gear lock actuator crank on Boeing 727 series aeroplanes. The directive applies to all Boeing 727 models and requires compliance immediately by following the instructions in Boeing Service Bulletin 32-67 (Revision 1). (See: \"Applicability: All models.\"; \"Document: Boeing SB 32-67 (R-1).\"; \"Compliance: Forthwith.\")\n\n### Who this affects\n\n- Aircraft owners and operators of any Boeing 727 series aeroplane (\"Applicability: All models.\").\n- Maintenance organisations and engineers who must carry out the inspection and any required modification listed in the referenced Boeing service bulletin.\n- The Civil Aviation Safety Authority (CASA) as the regulator issuing and enforcing the directive.\n\n### How it works mechanically\n\n- The directive requires operators to inspect and, if necessary, modify the nose landing gear lock actuator crank in line with Boeing SB 32-67 (R-1). The AD itself does not reproduce the technical steps; it incorporates the Boeing service bulletin by reference (\"Document: Boeing SB 32-67 (R-1).\").\n- The timing is immediate: operators must comply forthwith (\"Compliance: Forthwith.\").\n\n### Who pays, who decides, and what behaviour changes\n\n- Who pays: Aircraft owners/operators pay for the inspection and any modification work, including parts, labour and any downtime required for maintenance. The directive text does not state costs. (No cost information is provided in the AD text.)\n- Who decides: CASA issues and enforces the directive; the detailed technical method is determined by the Boeing service bulletin referenced in the AD (\"Document: Boeing SB 32-67 (R-1).\").\n- Behaviour changes: Operators must schedule and complete the required inspection/modification immediately and must follow the procedures in the Boeing service bulletin rather than relying on routine maintenance intervals.\n\n### Trade-offs, compliance burden and implementation risks\n\n- Compliance burden: The directive imposes an immediate duty to inspect and possibly modify an aircraft component. The scale of burden (time, parts, labour, and aircraft downtime) depends on the requirements set out in Boeing SB 32-67 (R-1), which the AD incorporates but does not reproduce.\n- Incentives and costs: The directive creates a near-term compliance cost for all owners/operators of affected aircraft. Any benefits claimed by the issuer (for example, to address an identified safety risk) are asserted by the regulator and the service bulletin; the AD text itself does not quantify benefits or costs.\n- Implementation risks: Because compliance is required forthwith, operators may need to ground aircraft until inspections/modifications are completed. The AD text does not set a phased schedule or exemptions; it mandates immediate action. The exact technical judgment and steps are delegated to the Boeing service bulletin, so operators and maintenance organisations must follow that external document.\n- Discretion and enforcement: The AD states the mandatory requirement but does not specify enforcement mechanisms or penalties in the text provided. Enforcement practice is determined by CASA's regulatory framework and is not detailed in this AD.\n\n### Practical note on source and limits\n\nThis summary is based only on the AD text provided: the title, applicability statement, the reference to Boeing SB 32-67 (R-1), and the compliance timing (\"Forthwith\"). The AD does not include the technical content of the inspection or modification steps, cost estimates, or enforcement provisions; those details are contained in or determined by the referenced Boeing service bulletin and CASA enforcement practice."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose."},"complexity_factors":["Extremely short document — only 4 substantive lines","No defined terms section; all language is plain operational","Single, unambiguous applicability clause ('All models')","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","No conditional logic or exceptions — just a straightforward command to comply with a referenced technical document","Relies entirely on external technical document (Boeing SB 32-67) for actual procedural detail"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- Requires owners and operators of **Boeing 727 aircraft** to inspect and modify a specific part called the **\"nose landing gear lock actuator crank\"** — a component that helps secure the front wheels when the plane is on the ground.\n- The work must follow instructions in **Boeing Service Bulletin 32-67 (Revision 1)** — essentially the manufacturer's official repair notice.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains **any model of Boeing 727** aircraft in Australia.\n\n**Why it matters:**\n- This type of directive is issued when a safety defect is discovered that could affect flight safety. The \"forthwith\" compliance deadline means **do it immediately** — there's no grace period. Failure to comply means the aircraft cannot legally fly.\n\n**Key takeaway:** If you're flying or fixing a Boeing 727 in Australia, you must check and fix this landing gear part right now, following Boeing's specific instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification","history":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification/history","analysis":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification/analysis","conflicts":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification/important-cases","documents":"/api/acts/ad-b727-15-nose-landing-gear-lock-actuator-crank-inspection-and-modification/documents"}}