{"id":"F2006B08608","name":"AD/CL-600/46 - Main Windshield Fasteners","slug":"ad-cl-600-46-main-windshield-fasteners","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51526,"registerId":"commonwealth-F2006B08608-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.002.png)\n\n![](image.002.png)  \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 CAR 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.","sortOrder":0},{"sectionNumber":"AD/CL-600/46 Main Windshield Fasteners 1","sectionType":"part","heading":"AD/CL-600/46 Main Windshield Fasteners 13/2001","content":"# ![](image.003.png)AD/CL-600/46 Main Windshield Fasteners 13/2001\n\nApplicability: Model CL-600-2B19 aircraft, serial numbers 7003 and subsequent, which are equipped with windshield part numbers 601R33033-1, \\-2, \\-5, \\-6, \\-9, and \\-10, and which have accumulated less than 2,500 flight cycles.\n\nRequirement: Accomplish the following in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601R-56-004, dated 16 August 2001.\n\n    Inspect the aft edge of the left and right main windshields to determine whether part number CSB-NP-139321-002-1 placard is installed.\n\nFor windshields equipped with this placard, no further action is required.\n\n    2. Any windshield not equipped with a placard per Requirement 1 must be modified by replacing nine of the existing hi-lok pins installed in the lower forward corner of the windshield, with reduced shank diameter hi-lok pins.\n\nNote 1: It has been determined that the risk of windshield failure is higher for windshields with low flight cycles. Therefore, Transport Canada recommends first accomplishment on windshields with the least number of flight cycles.\n\nNote 2: Transport Canada AD CF-2001-35R1 refers.\n\nCompliance: Before 31 October 2002, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 27 December 2001.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains a narrow, targeted scope consistent with typical airworthiness directives. It addresses a specific technical defect in a specific aircraft model with specific part numbers, without expanding into broader operational or maintenance requirements."},"complexity_factors":["Single, clearly defined applicability section with three cumulative conditions (model, serial number range, specific part numbers, and flight cycle threshold)","Simple binary decision tree: inspect for placard → if present, stop; if absent, perform specific modification","Only one cross-reference (to Bombardier Service Bulletin 601R-56-004 for detailed instructions)","Minimal defined terms — only standard aviation terminology (flight cycles, hi-lok pins, shank diameter)","Single compliance deadline with straightforward exception (\"unless already accomplished\")","No nested exceptions or conditional sub-clauses beyond the basic placard check"],"plain_english_summary":"This AD requires operators of Bombardier CL-600-2B19 (CRJ200) aircraft serials 7003 and up with specific windshields and under 2,500 cycles to inspect for a windshield placard. If the placard is missing, nine lower-forward windshield fasteners must be replaced with reduced-shank pins per Bombardier instructions.\n\nIt's mandatory because missing placards indicate a fastener design risk that could cause windshield failure, rapid decompression, or loss of cockpit visibility; compliance is required by 31 October 2002."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument confines action to a defined subset of CL‑600‑2B19 aircraft and prescribes either inspection or a specific hardware modification per a service bulletin. The text contains no indication that the AD's scope was expanded or narrowed from its stated purpose; it sets applicability, required actions, and a deadline (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow technical applicability: limited to Model CL‑600‑2B19, serial numbers 7003 and subsequent, specific windshield part numbers, and aircraft with <2,500 flight cycles (Applicability).","Two-step compliance determination: an initial placard inspection can eliminate further work; otherwise a specified hardware modification is mandatory (Requirement).","Technical compliance dependency: modification must follow Bombardier Service Bulletin 601R‑56‑004, creating reliance on an external technical document for execution (Requirement).","Fixed compliance timeline and effective date: work required before 31 October 2002; AD effective 27 December 2001, constraining scheduling (Compliance and header).","Risk‑based prioritisation: Note 1 directs earlier action on lower‑cycle windshields, affecting operator scheduling and resource allocation (Note 1).","Cross‑jurisdictional reference: AD refers to Transport Canada AD CF‑2001‑35R1, indicating coordination and potential alignment of standards (Note 2).","Operator cost and labour burden: inspection and, if required, replacement of nine hi‑lok pins implies parts, certification of personnel, and downtime (implied by Requirement).","Inspection ambiguity: compliance depends on correct identification of the placard and inspection of the aft edge of the windshield, which may introduce variability in how operators determine applicability (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier CL-600-2B19 aircraft (serials 7003 onward) with specified windshield part numbers and fewer than 2,500 flight cycles to inspect the aft edge of each main windshield for a placard and, if the placard is missing, replace nine lower‑forward hi‑lok pins with reduced‑shank pins per Bombardier Service Bulletin 601R‑56‑004. The stated aim (Transport Canada) is to reduce windshield failure risk; operators must complete the work by 31 October 2002 and bear inspection and modification costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-46-main-windshield-fasteners","history":"/api/acts/ad-cl-600-46-main-windshield-fasteners/history","analysis":"/api/acts/ad-cl-600-46-main-windshield-fasteners/analysis","conflicts":"/api/acts/ad-cl-600-46-main-windshield-fasteners/conflicts","importantCases":"/api/acts/ad-cl-600-46-main-windshield-fasteners/important-cases","documents":"/api/acts/ad-cl-600-46-main-windshield-fasteners/documents"}}