{"id":"F2006B02770","name":"AD/B727/67 - Nose Gear Drag Brace Lock Actuating Arm - Replacement","slug":"ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42112,"registerId":"commonwealth-F2006B02770-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/67 - Nose Gear Drag Brace Lock Actuating Arm - Replacement","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/B727/67  Nose Gear Drag Brace Lock Actuating Arm - Replacement\n\n\n3/71\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Replace nose gear drag brace lock actuating arms P/Nos. 65-20687-6, -7 or -8 in accordance with Boeing SB No. 32-162, Rev. 1.\n\n \n\nCompliance: 1. For components with less than 4000 landings as at 15 March 1971 - before exceeding 5000 landings.\n\n \n\n2.    For components with between 4000 and 9000 landings as at 15 March 1971 - within 1000 landings from 15 March 1971.\n\n \n\n3.    For components with between 9000 and 9800 landings as at 15 March 1971 - before exceeding 10,000 landings.\n\n \n\n4.    For components with more than 9800 landings as at 15 March 1971 - within 200 landings from 15 March 1971.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive from 1971. It has not expanded beyond its original narrow purpose of mandating replacement of a specific defective landing gear component. The scope remains tightly confined to the Boeing 727 nose gear drag brace lock actuating arm."},"complexity_factors":["Single, specific mechanical component targeted (one assembly with three part numbers)","Clear, arithmetic compliance formula based on landing counts (four simple thresholds)","No defined terms section or interpretive provisions","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Single requirement with no exceptions, exemptions, or conditional sub-requirements","Document is extremely short (under 200 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Boeing 727 aircraft** to replace a specific part on the nose landing gear.\n\n**What part?** The \"nose gear drag brace lock actuating arm\" — a component that helps lock the front landing gear in place when it's extended for landing. The directive targets three specific part numbers (65-20687-6, -7, and -8).\n\n**Why?** The directive references a Boeing Service Bulletin (SB 32-162), suggesting the original parts were found to be unsafe or prone to failure. When an AD issues, compliance is legally mandatory — you cannot fly the aircraft until the work is done.\n\n**When must this be done?** The deadline depends on how many times the aircraft had landed by **15 March 1971**:\n- **Low use** (under 4,000 landings): Replace before hitting 5,000 total landings\n- **Moderate use** (4,000–9,000 landings): Replace within 1,000 landings of the deadline date\n- **High use** (9,000–9,800 landings): Replace before 10,000 total landings  \n- **Very high use** (over 9,800 landings): Replace within 200 landings — effectively immediately\n\n**Who does this affect?** Airlines, cargo operators, or any entity operating Boeing 727s in Australian airspace. Given the 1971 date and the aircraft type, this AD is now of historical interest — the Boeing 727 was retired from most commercial service decades ago."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive itself applies to all Boeing 727 models and mandates replacement of the listed part numbers per Boeing SB No. 32‑162, Rev. 1, with compliance tied to landing‑count bands as at 15 March 1971. The text contains no language indicating a change to that stated scope or to the affected parts beyond the replacement requirement."},"complexity_factors":["Applicability to all models — the AD states: \"Applicability: All models.\" (header & Applicability line).","Specific parts mandated — replacement of P/N 65‑20687‑6, ‑7 or ‑8: \"Requirement: Replace nose gear drag brace lock actuating arms P/Nos. 65-20687-6, -7 or -8\" (Requirement line).","Prescriptive compliance method — requirement to follow an external document: \"in accordance with Boeing SB No. 32-162, Rev. 1.\" (Requirement line).","Multiple landing‑count thresholds — four timing categories tied to landings as at a fixed date (15 March 1971): Compliance paragraphs 1–4 specify different landing bands and deadlines (Compliance lines).","Record‑keeping and operational scheduling burden — timing is measured in landings (not calendar dates), requiring reliable landing counts and planning to avoid exceeding thresholds (Compliance paragraphs 1–4).","Enforcement origin — issued under Commonwealth civil aviation framework: header cites the Civil Aviation Safety Authority and Schedule of Airworthiness Directives (document header)."],"plain_english_summary":"This airworthiness directive requires replacement of specified nose‑gear drag‑brace lock actuating arms (P/N 65‑20687‑6, ‑7 or ‑8) on Boeing 727 aeroplanes and sets mandatory deadlines based on the number of landings. It applies to all models and must be carried out in accordance with Boeing Service Bulletin No. 32‑162, Rev. 1. Operators must plan and schedule the replacements so aircraft comply by the landing‑count thresholds set in the directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement","history":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement/history","analysis":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement/analysis","conflicts":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement/conflicts","importantCases":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement/important-cases","documents":"/api/acts/ad-b727-67-nose-gear-drag-brace-lock-actuating-arm-replacement/documents"}}