{"id":"F2006B11171","name":"AD/LJ60/3 - Brake Valve","slug":"ad-lj60-3-brake-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56869,"registerId":"commonwealth-F2006B11171-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\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 CASR 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.\n\n![](image.001.png)  \n\nLearjet 60 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/LJ60/3 Brake Valve 4/2004","sectionType":"part","heading":"AD/LJ60/3 Brake Valve 4/2004","content":"# AD/LJ60/3 Brake Valve 4/2004\n\nApplicability: Model 60 aeroplanes, serial numbers 60-002 through 60-189 inclusive. Requirement: 1. For aeroplanes having serial numbers 60-002 through 60-093 inclusive, and\n\n60-095 through 60-188 inclusive: Replace the existing brake valve lever stop switch with a new brake valve lever stop switch, and replace the brake valve adjustment screws with new improved screws, in accordance with Bombardier Service Bulletin (S/B) 60-32-10, Revision 1, dated June 22, 2000.\n\n2. For aeroplanes having serial number 60-094 or 60-189: Replace the brake valve adjustment screws with new improved screws, in accordance with Bombardier S/B 60-32-10, Revision 1.\n\nNote: FAA AD 2001-12-02 Amdt 39-12257 refers.\n\nCompliance: Unless previously accomplished prior to further flight.\n\nThis Airworthiness Directive becomes effective on 15 April 2004.\n\nBackground: Bottoming of the valve components before contact of the brake valve lever with the stop could result in loss of all hydraulic fluid and consequent loss of normal braking.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 5 March 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"N/A - This is a standalone safety directive with no legislative evolution to assess. The scope remains precisely targeted at correcting the specific brake valve defect in identified Learjet 60 aircraft."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined serial number ranges with distinct requirements","Single cross-reference to FAA AD 2001-12-02 and Bombardier Service Bulletin","No nested exceptions or conditional logic beyond serial number grouping","Clear, imperative language ('Replace... in accordance with...')","Single compliance trigger (prior to further flight)"],"plain_english_summary":"This AD requires owners/operators of certain Learjet 60 airframes to immediately install updated brake‑valve components because existing parts can bottom out, risking hydraulic loss and total brake failure. Affected aircraft may not fly until the corrective work is done. The action follows Bombardier service instructions and aligns with an FAA directive to eliminate a life‑threatening landing‑brake defect."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD imposes mandatory repairs exactly matching the manufacturer’s service instructions for a defined set of serial-numbered Learjet 60 aircraft to address a specific unsafe condition (valve bottoming causing hydraulic loss). It does not broaden applicability beyond those aircraft or add new types of measures beyond the S/B and the FAA reference."},"complexity_factors":["Narrow, clearly enumerated applicability (serial numbers 60-002 through 60-189 with two small exception groups)","Single corrective action set: replace switch and/or replace adjustment screws per a single Bombardier Service Bulletin (60-32-10 Rev 1)","Immediate compliance requirement ('unless previously accomplished prior to further flight') creates operational timing pressure","Dependence on availability of specified approved parts and ability of operators/maintenance organisations to implement the S/B","Reference to FAA AD 2001-12-02 creates alignment with foreign airworthiness action but no additional technical requirements","Enforcement and discretion lie with CASA under CASR subregulation 39.1(1), but the AD leaves technical execution to the S/B"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Learjet 60 aeroplanes serial numbers 60‑002 through 60‑189 to replace the brake valve lever stop switch and/or fit improved brake valve adjustment screws per Bombardier Service Bulletin 60‑32‑10 Revision 1. The work must be done before further flight if it has not already been completed. CASA’s delegate issued the AD to prevent valve bottoming that can cause total hydraulic fluid loss and consequent loss of normal braking; operators pay for parts and labour and must comply under CASR subregulation 39.1(1)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-lj60-3-brake-valve","history":"/api/acts/ad-lj60-3-brake-valve/history","analysis":"/api/acts/ad-lj60-3-brake-valve/analysis","conflicts":"/api/acts/ad-lj60-3-brake-valve/conflicts","importantCases":"/api/acts/ad-lj60-3-brake-valve/important-cases","documents":"/api/acts/ad-lj60-3-brake-valve/documents"}}