{"id":"F2006B11124","name":"AD/LEARJET 35/9 - Secondary Yaw Damper Servo Cable Clamp Bolt - Inspection","slug":"ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56798,"registerId":"commonwealth-F2006B11124-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET 35/9 - Secondary Yaw Damper Servo Cable Clamp Bolt - 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)  Gates Learjet 35 and 36 Series Aeroplanes\n\n \n\nAD/LEARJET 35/9 Secondary Yaw Damper Servo Cable\n\nClamp Bolt - Inspection\n\nApplicability: All model 35 with S/Nos. 35-001 to 35-182.\n\n \n\nAll model 36 with S/Nos. 36-001 to 36-038.\n\n \n\nDocument: Gates Learjet SB 35/36-22-2.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1978.\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\n \n\n\n12/78\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on one specific mechanical inspection. It has not expanded beyond its original purpose of addressing a identified safety issue with the yaw damper servo cable clamp bolt on specific Learjet models."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","Simple conditional logic: single compliance deadline with clear applicability criteria","Single technical reference to manufacturer service bulletin (Gates Learjet SB 35/36-22-2)","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Gates Learjet 35 and 36 series aircraft to inspect a particular bolt on the secondary yaw damper servo cable clamp.\n\n**Who it affects:**\n- Owners and operators of Learjet Model 35 aircraft with serial numbers 35-001 through 35-182\n- Owners and operators of Learjet Model 36 aircraft with serial numbers 36-001 through 36-038\n\n**What it requires:**\n- An inspection of the \"Secondary Yaw Damper Servo Cable Clamp Bolt\" — a component that helps stabilize the aircraft during flight by controlling yaw (side-to-side movement)\n- The inspection must be done within 100 hours of flight time after 31 December 1978\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. If this bolt fails or is improperly secured, it could affect the aircraft's yaw damper system, potentially compromising flight stability and safety. Compliance is mandatory — you cannot legally fly the aircraft without completing this inspection."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text is a single, focused airworthiness directive with a stated applicability (specific serial-number ranges), a single compliance action (inspection), a compliance timeframe (100 hours after 31 December 1978), and a reference to the manufacturer's service bulletin for procedures. The excerpt contains no language indicating an amendment to or expansion of a prior instrument, nor does it add elements outside that narrow inspection requirement. Therefore, based on the provided text, there is no evidence the scope has changed from the directive's original limited inspection purpose."},"complexity_factors":["Narrow technical subject matter (single clamp bolt on secondary yaw damper servo) reduces substantive complexity.","Limited applicability defined by specific serial-number ranges simplifies identification of affected aircraft (\"Applicability: All model 35 with S/Nos. 35-001 to 35-182. All model 36 with S/Nos. 36-001 to 36-038.\").","Clear, single compliance deadline tied to a date and flight-hours metric reduces scheduling ambiguity (\"Compliance: Within 100 hours time in service after 31 December 1978.\").","Reliance on an external service bulletin for procedural detail introduces a dependency: the operator must obtain and follow Gates Learjet SB 35/36-22-2 (\"Document: Gates Learjet SB 35/36-22-2.\"), creating modest practical complexity.","The AD excerpt omits procedural, enforcement, and cost-allocation details, requiring users to consult additional sources (the service bulletin and regulatory framework) to fully understand obligations."],"plain_english_summary":"What this instrument does, mechanically\n\n- This is an airworthiness directive requiring a one-off inspection of a specific bolt that secures the secondary yaw damper servo cable on certain Learjet aircraft. (\"AD/LEARJET 35/9 Secondary Yaw Damper Servo Cable Clamp Bolt - Inspection\")\n\nWho and what it applies to\n\n- It applies only to serial-number ranges of the Gates Learjet 35 and 36 series listed in the directive: model 35 S/N 35-001 to 35-182 and model 36 S/N 36-001 to 36-038. (\"Applicability: All model 35 with S/Nos. 35-001 to 35-182. All model 36 with S/Nos. 36-001 to 36-038.\")\n\nWhen and how to comply\n\n- The inspection must be completed within 100 hours time in service after 31 December 1978. (\"Compliance: Within 100 hours time in service after 31 December 1978.\")\n- The directive refers operators to the manufacturer service bulletin for the inspection procedure: Gates Learjet SB 35/36-22-2. (\"Document: Gates Learjet SB 35/36-22-2.\")\n\nWho decides and who is affected\n\n- The instrument appears in the Commonwealth Schedule of Airworthiness Directives under the Civil Aviation Regulations framework and is an action directed at operators/owners of the listed aircraft. (Header: \"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES\" and the \"Applicability\" clause.)\n\nPurpose claims and practical implications (source-grounded)\n\n- The directive requires inspection of a specific clamp bolt (stated by the title and applicability). The text itself directs the inspection and the timing but does not state detailed reasons or consequences for non-compliance within this excerpt. (Title and \"Compliance\" clause.)\n- Mechanically, complying requires: identifying affected airframes by serial number, scheduling the inspection within the stated 100 flight-hour window after 31 December 1978, and following the procedures in the referenced service bulletin. (\"Applicability\", \"Compliance\", \"Document\".)\n\nCosts, incentives and compliance burdens (source-grounded)\n\n- The directive creates an operational requirement for the listed aircraft; the text does not allocate costs or expressly state who pays for labour, parts, or aircraft downtime. (No cost-allocation language in the supplied text.)\n- Compliance imposes a timing constraint (100 hours after 31 December 1978), which can require operators to schedule work within that window and to obtain the referenced service bulletin to perform the inspection. (\"Compliance\"; \"Document\".)\n- The directive prescribes a narrowly defined technical action (inspect the secondary yaw damper servo cable clamp bolt) on a limited set of serial numbers, which concentrates the compliance burden on the owners/operators of those specific aircraft. (\"Applicability\".)\n\nInformation and discretion gaps in the text\n\n- The AD cites the service bulletin for the inspection procedure but does not reproduce the procedure or state follow-up actions (e.g., repair or replacement criteria) in the supplied text. Operators must consult Gates Learjet SB 35/36-22-2 for procedural detail. (\"Document: Gates Learjet SB 35/36-22-2.\")\n- The supplied excerpt does not specify enforcement mechanisms, record-keeping requirements, or penalties for non-compliance; those items, if present, would be found elsewhere in the regulatory framework or the full AD text. (No enforcement/penalty language in the supplied text.)\n\nNet effect, in practical terms\n\n- Operators of the listed Learjet 35/36 serial numbers must inspect the named bolt within the stated 100-hour window after the specified date, following the referenced service bulletin. The directive narrows the affected population (specific S/N ranges) and relies on the manufacturer document for technical steps; the supplied text does not allocate costs or state administrative penalties, so operators must interpret compliance obligations by combining this AD with the referenced service bulletin and the broader regulatory regime. (\"Applicability\", \"Compliance\", \"Document\"; header.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection","history":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection/history","analysis":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection/analysis","conflicts":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection/conflicts","importantCases":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection/important-cases","documents":"/api/acts/ad-learjet-35-9-secondary-yaw-damper-servo-cable-clamp-bolt-inspection/documents"}}