{"id":"F2006B03533","name":"AD/BAe 146/86 - Environmental Control System Inspection for Contamination","slug":"ad-bae-146-86-environmental-control-system-inspection-for-contamination","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43100,"registerId":"commonwealth-F2006B03533-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/BAe 146/86 Environmental Control Syst","sectionType":"part","heading":"AD/BAe 146/86 Environmental Control System","content":"# AD/BAe 146/86 Environmental Control System\n\nInspection for Contamination\n\nApplicability: All British Aerospace BAe 146-100, \\-200 and \\-300 series aircraft.","sortOrder":1},{"sectionNumber":"5/2001","sectionType":"part","heading":"5/2001","content":"#   \n5/2001\n\nTX","sortOrder":2}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a standard, narrow airworthiness directive focused on a specific safety issue (ECS contamination) for a specific aircraft type (BAe 146 series). There is no indication of scope creep beyond the original safety purpose."},"complexity_factors":["Short, single-purpose directive focused on one specific aircraft type and one system","Standard AD structure with clearly labeled sections (Applicability, Requirement, Compliance, Background)","No nested exceptions or conditional logic visible in the extract provided","Limited defined terms — relies on standard aviation terminology","Cross-references only to subregulation 39.1(1) of CAR 1998 (Civil Aviation Regulations)","Extract appears incomplete — full technical instructions likely in sections not fully reproduced"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nThis directive requires owners and operators of specific British Aerospace BAe 146 aircraft (the -100, -200, and -300 series) to inspect their **Environmental Control System (ECS)** for contamination. The ECS is the system that manages cabin air quality, temperature, and pressure — basically what keeps passengers and crew breathing comfortably and safely at altitude.\n\n**Why it matters:**\nContamination in this system could affect air quality, potentially exposing crew and passengers to harmful substances or causing system failures. The directive was issued because CASA identified an \"unsafe condition\" that needed correcting.\n\n**Who must comply:**\nAnyone who owns or operates a BAe 146-100, -200, or -300 series aircraft in Australia.\n\n**What must be done:**\nThe directive mandates specific inspection actions (the exact technical steps would be detailed in the \"requirement section\" and \"compliance section\" referenced in the text, though those details appear truncated in this extract). These inspections must happen at specified times and follow CASA's instructions exactly.\n\n**The bottom line:**\nIf you fly or maintain one of these specific BAe 146 aircraft, you legally must perform this contamination inspection on the environmental control system. It's not optional — it's a safety-critical compliance requirement enforced by CASA under aviation law."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The supplied text does not indicate any alteration of the AD's scope from an earlier instrument. The AD as provided is explicitly applicable to all BAe 146-100, -200 and -300 series aircraft and mandates inspection and corrective action for ECS contamination as set out in the AD's requirement and compliance sections (source: Applicability; issuance paragraph). No change of scope is evident in the excerpt."},"complexity_factors":["Mandatory actions are defined in separate requirement and compliance sections that are referenced but not included in the supplied text, requiring consultation of the full AD to implement.","Authority and issuance rest on delegated power under subregulation 39.1(1) of CAR 1998, introducing administrative discretion in the AD's formulation and timing.","Applicability covers all BAe 146-100, -200 and -300 variants, so operators across different configurations must check variant-specific implications.","Operational complexity from scheduling inspections and completing any corrective work (potential downtime and maintenance resource allocation) is implied though procedural detail is absent.","Legal/compliance consequence: once the AD is published it creates a mandatory obligation, so record-keeping and evidence of compliance will be necessary even though the excerpt does not specify those administrative requirements."],"plain_english_summary":"This Airworthiness Directive, issued by a CASA delegate, mandates inspections and any corrective action specified in the AD for Environmental Control System contamination on all British Aerospace BAe 146‑100/‑200/‑300 aircraft. It converts a stated unsafe condition into a compulsory obligation for owners/operators, who must follow the AD’s requirements and will bear the immediate inspection, remediation and operational costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination","history":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination/history","analysis":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination/analysis","conflicts":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination/conflicts","importantCases":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination/important-cases","documents":"/api/acts/ad-bae-146-86-environmental-control-system-inspection-for-contamination/documents"}}