{"id":"F2006B10593","name":"AD/HU 269/19 Amdt 1 - Engine Mount Hanger - Inspection","slug":"ad-hu-269-19-amdt-1-engine-mount-hanger-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116449,"registerId":"commonwealth-F2006B10593-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/19 Amdt 1 - Engine Mount Hanger - Inspection","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)  Schweizer (Hughes) 269 Series Helicopters\n\n \n\nAD/HU 269/19\n\nAmdt 1\n\n\nEngine Mount Hanger - Inspection 11/67\n\n \n\nApplicability: Models 269A and 269B.\n\n \n\nRequirement: Carry out a visual inspection of the left and right hand engine mount drive end hangar assembly P/No. 269A8617 and 269A8618 for cracking.\n\n \n\nNote: A light and mirror will be required as an aid to the inspection.\n\n \n\nCompliance: At intervals not exceeding 60 hours time in service after 19 May 1967.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical inspection. It has not expanded beyond its original safety purpose. The amendment (Amdt 1) appears to be a routine update to an existing directive, not a scope expansion."},"complexity_factors":["Extremely short document — approximately 150 words of substantive content","Only 2 defined applicability criteria (Models 269A and 269B)","Single, straightforward requirement with no conditional logic or exceptions","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple compliance formula: fixed interval (60 hours) with clear start date","Minimal technical jargon — only part numbers and basic aviation terms"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific helicopter models.\n\n**What it does:**\n- Requires owners and operators of **Schweizer (Hughes) 269A and 269B helicopters** to visually inspect the engine mount hangers (parts numbered 269A8617 and 269A8618) for cracks.\n- These hangers are located at the \"drive end\" of the engine mount — essentially where the engine attaches to the helicopter frame.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains these specific helicopter models.\n- Maintenance engineers who perform the inspections.\n\n**What must be done:**\n- Use a light and mirror to check both left and right engine mount hangers for cracking.\n- Repeat this inspection **every 60 hours of flight time** (\"time in service\" means actual flying hours, not just engine running time).\n- The clock started ticking on **19 May 1967** — so the first inspection had to happen by then, and every 60 hours after.\n\n**Why it matters:**\nEngine mount hangers hold the engine to the airframe. If they crack and fail, the engine could detach in flight — catastrophic for a helicopter. This directive prevents that by catching fatigue cracks before they become dangerous.\n\n**Key point:** This is **Amendment 1** (Amdt 1) of an existing directive, suggesting the original AD/HU 269/19 has been updated, though the text provided doesn't specify what changed from the original."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"This document is labelled as Amendment 1 (Amdt 1) to AD/HU 269/19, so it modifies an earlier airworthiness directive. The text here prescribes visual inspections of specific hanger assemblies on 269A/269B models at intervals not exceeding 60 hours after 19 May 1967 (Applicability; Requirement; Compliance). The exact nature and extent of the change relative to the prior version cannot be determined from this document alone because the prior text is not included."},"complexity_factors":["Narrow technical scope: applies only to models 269A and 269B and to two specific part numbers (269A8617, 269A8618) (Applicability; Requirement).","Simple mandated action: a visual inspection, aided by a light and mirror, rather than multi-step procedures or testing standards (Requirement; Note).","Fixed, short compliance interval (every 60 hours time in service) with a specific start date (19 May 1967) (Compliance).","Lack of procedural detail for corrective actions or reporting increases implementation variability (Requirement — absence of corrective-action text).","Low administrative complexity in reading the directive, but potential operational complexity in scheduling inspections and handling findings (Compliance; Note)."],"plain_english_summary":"This directive requires owners/operators of Schweizer (Hughes) 269A and 269B helicopters to conduct recurring visual inspections (with a light and mirror) of left‑ and right‑hand engine mount drive end hanger assemblies (parts 269A8617/269A8618) for cracking at intervals not exceeding 60 hours TIS (from 19 May 1967). Compliance costs (labour, inspection aids, and any repairs or part replacements) fall to operators/maintenance providers; the text mandates inspection but gives no crack‑size criteria or specific corrective procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection","history":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection/history","analysis":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection/analysis","conflicts":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection/conflicts","importantCases":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection/important-cases","documents":"/api/acts/ad-hu-269-19-amdt-1-engine-mount-hanger-inspection/documents"}}