{"id":"F2006B08590","name":"AD/CL-600/3 - Passenger Door Interior and Exterior Handles and Latch Mechanism - Inspection and Modification","slug":"ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51460,"registerId":"commonwealth-F2006B08590-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/3 - Passenger Door Interior and Exterior Handles and Latch Mechanism - 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)  Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n \n\n# AD/CL-600/3 Passenger Door Interior and Exterior Handles and Latch Mechanism - Inspection and Modification\n\nApplicability: All models with S/Nos. 1024 to 1075. Document:  Canadair Challenger Alert SB No. A600-0203.\n\nCompliance: Within 50 hours time in service after 31 March, 1983.\n\n# 3/83\n\n \n\nBackground: Passenger door latch mechanisms and associated fittings have been found incorrectly rigged.\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 discrete, targeted safety directive addressing a specific mechanical defect in a limited aircraft population. It has not expanded beyond its original purpose of ensuring proper door latch rigging."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 substantive requirements: applicability, document reference, and compliance deadline","No defined terms section","No cross-references to other legislation","Single condition (serial number range) with no nested exceptions","Straightforward compliance timeline (50 hours after fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for specific Bombardier Challenger aircraft.\n\n**What it does:**\n- Requires owners/operators of certain Challenger CL-600 series planes (serial numbers 1024 to 1075) to inspect and modify the passenger door handles and latch mechanisms.\n- The work must follow Canadair's Alert Service Bulletin A600-0203.\n\n**Why it matters:**\n- **Safety issue:** Door latches were found to be \"incorrectly rigged\" (improperly adjusted/installed), which could prevent the door from sealing properly or staying closed during flight.\n- **Deadline:** The inspection and modification must be completed within 50 flight hours after 31 March 1983.\n\n**Who it affects:**\n- Operators of Challenger CL-600 aircraft with serial numbers 1024–1075.\n- Maintenance organisations servicing these aircraft.\n\nThis is a mandatory safety order — compliance is not optional."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies only to CL-600 aircraft with serial numbers 1024–1075 and mandates inspection/modification of passenger door handles and latch mechanisms because incorrect rigging was found. The source text gives no indication that the scope has been expanded or altered from its original stated coverage (Applicability, Background), so there is no evidence in this text of a change in scope."},"complexity_factors":["Narrow applicability limited to specific serial numbers (Applicability)","Clear, short compliance window (50 hours after 31 March 1983) (Compliance)","Mandatory maintenance action (inspection and possible modification) requiring qualified personnel (Document)","Reliance on an external Service Bulletin for technical instructions (Document)","Regulatory origin and enforcement implied by Civil Aviation Safety Authority listing (COMMONWEALTH OF AUSTRALIA ...)"],"plain_english_summary":"This airworthiness directive (AD) requires inspection and, if needed, modification of the passenger door interior and exterior handles and the associated latch mechanism on a specific group of Bombardier (Canadair) CL-600 Challenger aircraft.\n\n- What the AD does mechanically: It orders operators to inspect the passenger door latch mechanisms and associated fittings and to perform modifications where the rigging is incorrect. The technical instructions to carry out the work are referenced in Canadair Challenger Alert Service Bulletin No. A600-0203 (Document) (Document: Canadair Challenger Alert SB No. A600-0203). (Document)\n\n- Which aircraft are affected: All CL-600 series aeroplanes with serial numbers 1024 to 1075. (Applicability)\n\n- When it must be done: The inspection (and any required modification) must be completed within 50 hours time in service after 31 March 1983. (Compliance)\n\n- Who issued the requirement: The measure appears in the Commonwealth schedule of airworthiness directives under the Civil Aviation Safety Authority framework, so the regulator is the issuing authority. (COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY)\n\nWho pays and who decides\n\n- Operators/owners of affected aircraft bear the cost of complying: they must schedule maintenance time, assign qualified maintenance personnel, and pay for any parts or labour needed to inspect and modify latch rigging. (Applicability, Compliance, Document)\n\n- The regulator (Civil Aviation Safety Authority) decides the requirement and the compliance deadline; the Service Bulletin cited supplies the technical steps for inspection and modification. (COMMONWEALTH OF AUSTRALIA ..., Document)\n\nBehaviour and incentives\n\n- Operators must arrange inspection and corrective work within the stated 50-hour window, which creates an immediate operational requirement to ground or schedule the aircraft for maintenance if the work cannot be done in-service. (Compliance)\n\n- The AD creates an incentive for operators to check rigging proactively and to follow the Service Bulletin to avoid regulator enforcement action for non-compliance. (Document, Compliance)\n\nCompliance burdens, discretion and implementation risks\n\n- Compliance burden: The requirement imposes a concrete maintenance task (inspection and possible modification) on affected aircraft, requiring qualified maintenance personnel, access to the door mechanisms, and potentially replacement parts or adjustment labour. (Document, Applicability)\n\n- Technical discretion: The AD relies on the referenced Service Bulletin for technical guidance; maintenance personnel will exercise professional judgment in implementing adjustments consistent with that Bulletin. (Document)\n\n- Implementation risk: If rigging errors are widespread, operators may face scheduling and parts-supply constraints to meet the 50-hour deadline. The AD text itself does not specify follow-up compliance checks or reporting procedures beyond requiring the inspection and modification. (Background, Compliance)\n\nSource statements about purpose\n\n- The AD states the background reason as: \"Passenger door latch mechanisms and associated fittings have been found incorrectly rigged.\" (Background)\n\n- That statement explains why the inspection/modification is required; the AD does not itself quantify the incidence or severity of the problem, nor does it include additional policy rationale beyond ensuring the specified systems are correctly rigged. (Background, Document)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica","history":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica/history","analysis":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica/analysis","conflicts":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica/conflicts","importantCases":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica/important-cases","documents":"/api/acts/ad-cl-600-3-passenger-door-interior-and-exterior-handles-and-latch-mechanism-inspection-and-modifica/documents"}}