{"id":"F2006B08586","name":"AD/CL-600/26 - Flap Actuators","slug":"ad-cl-600-26-flap-actuators","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51439,"registerId":"commonwealth-F2006B08586-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/26 - Flap Actuators","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\nAD/CL-600/26 Flap Actuators  10/93 DM\n\n \n\nApplicability: Model CL-600-2A12 with serial numbers 3002 through 3066. Model CL-600-2B16 with serial numbers 5001 through 5131.\n\nRequirement: Action in accordance with Canadair Challenger Alert Service Bulletin A601-0415 or Alert Wire TA601-0415-036.\n\n \n\nNote: Transport Canada AD CF-93-18 refers.\n\n \n\nCompliance: Unless already accomplished, within 10 hours time in service after 11 August 1993 or prior to 11 September 1993, whichever occurs first.\n\n \n\nBackground: The recent failure of a flap actuator was found to be caused by the incorrect installation of the shoulder bolt which secures the flap actuator to the wing trailing edge.\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 specific aircraft. The scope remains precisely limited to the identified flap actuator issue in the specified serial numbers, with no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (specific aircraft models and serial number ranges)","Single requirement with clear reference to external technical document","Simple compliance formula: 10 hours OR fixed date, whichever is first","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward cause-and-effect background explanation"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order for aircraft.\n\n**What it does:** Orders owners and operators of specific Bombardier Challenger jets to inspect and fix a dangerous problem with their flap actuators (the mechanical parts that extend and retract the wing flaps during takeoff and landing).\n\n**Who it affects:**\n- **Aircraft models:** CL-600-2A12 (serial numbers 3002–3066) and CL-600-2B16 (serial numbers 5001–5131)\n- **People affected:** Airlines, charter operators, and private owners flying these specific Challenger jets in Australia\n\n**The safety problem:** A flap actuator failed because a shoulder bolt was installed incorrectly. If this bolt fails, the flaps could malfunction — potentially causing loss of control during critical flight phases like landing.\n\n**What must be done:**\n- Follow the repair instructions in Canadair's Alert Service Bulletin A601-0415 or Alert Wire TA601-0415-036\n- **Deadline:** Complete the fix within 10 flight hours after 11 August 1993, or before 11 September 1993 — whichever comes first\n\n**Why it matters:** This is a time-critical safety fix. The \"whichever occurs first\" language means operators cannot delay — even if they haven't flown 10 hours, the hard deadline of 11 September 1993 applies. The reference to Transport Canada AD CF-93-18 shows this is part of a coordinated international safety response."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive targets a specific safety fault and applies only to defined CL-600 serial-number ranges, requiring the corrective action in the Canadair Alert Service Bulletin within a short mandatory window. That scope aligns with the stated purpose (addressing incorrect shoulder-bolt installation causing flap actuator failure) and does not broaden beyond that technical remedy (Applicability; Requirement; Compliance; Background; Note)."},"complexity_factors":["Narrow applicability by serial numbers (Applicability)","Short mandatory compliance window of 10 flight hours between 11 Aug 1993 and 11 Sep 1993 (Compliance)","Mandatory action references an external Canadair Alert Service Bulletin or Alert Wire (Requirement) — operators must obtain and follow that document","Technical nature of the task (flap actuator/shoulder bolt) requires qualified maintenance personnel (Background/Requirement)","Reference to a foreign airworthiness directive (Transport Canada AD CF-93-18) introduces cross-jurisdictional alignment (Note)","No express discretionary waiver or alternative compliance path in the text (Compliance)"],"plain_english_summary":"Requires operators of Bombardier (Canadair) CL-600 Challenger aeroplanes (specified serial-number ranges) to perform the inspection/rectification set out in Canadair Alert Service Bulletin A601‑0415 (or Alert Wire TA601‑0415‑036) because a flap actuator failure was linked to an incorrectly installed shoulder bolt. Compliance is mandatory within 10 hours time-in-service after 11 August 1993 or before 11 September 1993. The aircraft operator/owner must arrange and pay for the maintenance (Applicability; Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-26-flap-actuators","history":"/api/acts/ad-cl-600-26-flap-actuators/history","analysis":"/api/acts/ad-cl-600-26-flap-actuators/analysis","conflicts":"/api/acts/ad-cl-600-26-flap-actuators/conflicts","importantCases":"/api/acts/ad-cl-600-26-flap-actuators/important-cases","documents":"/api/acts/ad-cl-600-26-flap-actuators/documents"}}