{"id":"F2006B11111","name":"AD/LEARJET 35/31 - Emergency Brake Handle","slug":"ad-learjet-35-31-emergency-brake-handle","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56774,"registerId":"commonwealth-F2006B11111-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET 35/31 - Emergency Brake Handle","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 35/31 Emergency Brake Handle 2/96\n\nApplicability: Learjet 35-002 through 35-676.\n\n \n\nLearjet 36-001 through 36-063.\n\n \n\nRequirement: Modify the emergency brake lever cutout in accordance with Learjet Service Bulletin 35/36-53-9.\n\n \n\nCompliance: Modify the cutout within 600 hours time in service or one year after 1 February 1996 whichever is the later.\n\n \n\nBackground: It is possible for the pedestal cover assy to interfere with the operation of the emergency brake handle during an emergency braking situation. This AD modifies the handle cutout to prevent such an occurrence.\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 specific aircraft models. It has not expanded beyond its original purpose of mandating a single safety modification."},"complexity_factors":["Single, specific technical requirement with clear reference to manufacturer service bulletin","Simple applicability criteria based on aircraft serial number ranges","Straightforward compliance deadline using 'whichever is later' logic","No defined terms section, no cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Minimal conditional logic — essentially one requirement with one exception (the 'whichever is later' timing)","Short document (approximately 150 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Gates Learjet 35 and 36 series aircraft** to modify the emergency brake handle cutout (the opening where the handle sits). The modification must follow instructions in **Learjet Service Bulletin 35/36-53-9** (a technical notice from the manufacturer).\n\n**Why it matters:**\nThere's a safety risk where the pedestal cover assembly (a panel near the pilot's controls) could physically block or interfere with the emergency brake handle when a pilot needs to use it in an emergency. This modification prevents that interference, ensuring pilots can actually use the emergency brakes when needed.\n\n**Who must comply:**\n- Aircraft with serial numbers Learjet 35-002 through 35-676\n- Aircraft with serial numbers Learjet 36-001 through 36-063\n\n**When to do it:**\nWithin **600 flight hours** or **one year after 1 February 1996**, whichever comes later.\n\n**In short:** If you own one of these specific Learjets, you must get this brake handle modification done by a deadline to keep your aircraft legally airworthy and safe."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text does not indicate any change to scope from an earlier or different instrument. It applies to the specific Learjet 35 and 36 serial-number ranges listed (Applicability) and requires a single modification per the referenced service bulletin (Requirement) to address the interference risk described (Background)."},"complexity_factors":["Technical modification required but the AD delegates detailed method to an external Learjet Service Bulletin (Requirement)","Applicability limited to specific serial-number ranges, requiring operators to check individual airframe identity (Applicability)","Compliance deadline uses a \"whichever is later\" formula (600 hours or one year after 1 February 1996), creating a need to calculate time-in-service for each aeroplane (Compliance)","Operational planning and maintenance scheduling needed to implement the modification without unduly disrupting service (Compliance)","No cost or work-time estimates provided in the AD itself; operators must consult the service bulletin and maintenance providers for resource estimates (Requirement)"],"plain_english_summary":"This airworthiness directive mandates a physical modification to the emergency‑brake lever cutout on specified Gates Learjet 35 and 36 aeroplanes, to be done per Learjet Service Bulletin 35/36‑53‑9. It aims to prevent the pedestal cover assembly from interfering with the emergency brake handle.\n\nOwners/operators of the listed serial numbers must arrange and pay for the work within 600 flight hours or one year after 1 February 1996 (whichever is later); compliance is mandatory under the regulator’s AD."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-31-emergency-brake-handle","history":"/api/acts/ad-learjet-35-31-emergency-brake-handle/history","analysis":"/api/acts/ad-learjet-35-31-emergency-brake-handle/analysis","conflicts":"/api/acts/ad-learjet-35-31-emergency-brake-handle/conflicts","importantCases":"/api/acts/ad-learjet-35-31-emergency-brake-handle/important-cases","documents":"/api/acts/ad-learjet-35-31-emergency-brake-handle/documents"}}