{"id":"F2006B08610","name":"AD/CL-600/48 - CVR/FDR Paint Stripping","slug":"ad-cl-600-48-cvr-fdr-paint-stripping","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51535,"registerId":"commonwealth-F2006B08610-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\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 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.\n\n![](image.001.png)\n\nBombardier (Canadair) CL-600 (Challenger) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CL-600/48 CVR/FDR Paint Stripping 2/2","sectionType":"part","heading":"AD/CL-600/48 CVR/FDR Paint Stripping 2/2002","content":"# AD/CL-600/48 CVR/FDR Paint Stripping 2/2002\n\nApplicability: Model CL-600-2B19 “Regional Jet” aircraft, Serial Numbers 7003 through 7573. Requirement: 1. Conduct a visual inspection of the Flight Data Recorder (FDR) and Cockpit\n\nVoice Recorder (CVR) to determine if the dust covers have had a chemical agent resistant coating applied. Covers that have had a protective coating applied are identified through the markings detailed in the Accomplishment Instructions, Part A, of the applicable Bombardier Service Bulletins (SBs) listed below:\n\nFDR SB 601R-31-026 dated 12 October 2001 CVR SB 601R-23-056 dated 12 October 2001\n\n    2. If the FDR and/or CVR cover(s) do/does not have a chemical resistant coating, comply with either Requirement 2.a. or 2.b. as follows:\n\n    Rework the dust cover(s) in accordance with the requirements of Accomplishment Instructions, Part B, of the applicable Bombardier SB(s) detailed in Requirement 1; or\n\n    b. Install new dust cover(s), which have the “CLR CTD” markings, in accordance with the requirements of the Accomplishment Instructions, Part C, of the applicable Bombardier SB(s) detailed Requirement 1.\n\nNote: Transport Canada CF-2001-45 refers.\n\nCompliance: For Requirement 1 \\- Before 28 June 2003.\n\nFor Requirement 2 \\- Before 28 June 2003.\n\nThis Airworthiness Directive becomes effective on 21 February 2002.","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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD remains narrowly focused on a specific unsafe condition affecting FDR and CVR dust covers for a defined set of CL-600-2B19 serial numbers. It does not broaden the subject matter beyond inspecting and ensuring chemical‑agent‑resistant coatings on those dust covers, and it sticks to manufacturer SB procedures. There is no indication in the text that the AD expanded its original safety remit to other systems, aircraft types, or ongoing regulatory programs."},"complexity_factors":["Short, focused directive limited to one aircraft model (CL-600-2B19) and a narrow serial number range (7003–7573)","Only a few operative requirements: visual inspection, then either rework or replacement","Cross-references to two Bombardier Service Bulletins (FDR SB 601R-31-026 and CVR SB 601R-23-056) that contain the technical procedures","Single compliance deadline for all requirements (before 28 June 2003)","Reference to an external regulatory communication (Transport Canada CF-2001-45)","Minor conditional logic (if cover lacks coating, choose 2.a rework or 2.b replace)"],"plain_english_summary":"**What this directive requires (mechanics)\n\n- Applies to: Bombardier (Canadair) CL-600-2B19 Regional Jet aeroplanes with serial numbers 7003–7573. (See \"Applicability\".)\n\n- Action required: Operators must visually inspect the Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR) dust covers to see whether a chemical‑agent‑resistant protective coating has been applied. The presence of the coating is identified by specific markings set out in the Bombardier Service Bulletins (SBs) referenced in the AD. (See \"Requirement 1\" and the Bombardier SB references.)\n\n- If the covers do NOT have the protective coating, the operator must choose one of two options before the compliance date:\n  - Rework the existing dust covers in accordance with the Bombardier Service Bulletin procedures (Part B of the SB); or\n  - Install new dust covers that bear the specified marking (\"CLR CTD\") in accordance with the Bombardier Service Bulletin procedures (Part C of the SB). (See \"Requirement 2\".)\n\n- Deadlines: Both the inspection (Requirement 1) and any required rework or replacement (Requirement 2) must be completed before 28 June 2003. The AD became effective on 21 February 2002.\n\n- Cross‑references: The AD implements procedures from Bombardier Service Bulletin FDR SB 601R-31-026 and CVR SB 601R-23-056 (both dated 12 October 2001) and refers to a related Transport Canada communication (CF-2001-45).\n\nWhy the measure exists (stated reason)\n\n- The AD is issued to correct an identified unsafe condition affecting the FDR and CVR dust covers on the listed aircraft serial numbers. The AD follows the manufacturer's service instructions and an overseas regulator's advisory. The stated objective is to ensure the dust covers have a chemical‑agent‑resistant coating so the recorders remain protected as intended.\n\nPractical effects, who pays, who decides, and behaviour changes\n\n- Who pays: Aircraft owners/operators pay for the visual inspections, any rework, or replacement parts and associated labour and aircraft downtime.\n\n- Who decides: The regulator (CASA delegate issuing this AD) prescribes the requirement and the deadline. Operators decide which compliance option to use (rework or replace), but must follow the Bombardier SB procedures.\n\n- Behavioural change: Operators must add an inspection and, if necessary, a maintenance action (rework or part replacement) to their maintenance program for affected serial numbers by the stated deadline.\n\nCosts, incentives and trade‑offs\n\n- Direct costs: Inspection labour (limited, visual), and, if required, maintenance labour plus either rework materials or replacement dust covers. Aircraft downtime for the maintenance action is an additional cost.\n\n- Supply effects: The AD relies on Bombardier service procedures and on parts or materials that meet the SB requirements. This centralises the technical work around the manufacturer’s instructions and may favour approved suppliers or maintenance organisations familiar with the SBs.\n\n- Opportunity costs: Time and resources spent complying are diverted from other maintenance or operational tasks. If replacement dust covers are scarce, operators may experience scheduling delays.\n\n- Implementation risk: Compliance depends on access to the referenced Bombardier Service Bulletins and availability of marked replacement covers or qualified rework. Misidentification of marking or incorrect rework could leave the unsafe condition unaddressed.\n\nConcentrated benefits / diffuse costs and other structural effects\n\n- Concentrated benefit: Bombardier (as the SB author and parts supplier) and maintenance organisations that perform rework or supply marked covers are likely to receive most of the direct economic benefit from the mandated action.\n\n- Diffuse cost: The cost is borne across all affected operators (owners of the listed serial numbers), which may be many small operators and some larger carriers.\n\n- Competition / market effects: The AD channels technical compliance through the manufacturer’s SBs. Independent MROs can comply if they have access to the SBs and parts, but the need to follow the SB may raise the bar for those without Bombardier‑approved procedures or parts sources.\n\nSummary statement\n\n- Mechanically, the instrument requires inspection and, if necessary, rework or replacement of FDR/CVR dust covers to confirm or achieve a chemical‑agent‑resistant coating, within a fixed compliance window for specified CL‑600‑2B19 serial numbers. The stated safety purpose is to correct an unsafe condition; the practical effects are inspection and maintenance costs, reliance on Bombardier service instructions, and modest operational downtime for affected aircraft.\n"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific unsafe condition identified in the FDR and CVR dust covers of a particular aircraft series, requiring a targeted inspection and remediation. There is no evidence of scope creep; the directive remains focused on its original safety purpose."},"complexity_factors":["Single, specific aircraft model and serial number range (CL-600-2B19, Serial Numbers 7003 through 7573)","Only 2 defined requirements with clear binary decision tree (inspect → if no coating, then rework OR replace)","Minimal cross-referencing (only to two specific Bombardier Service Bulletins and one Transport Canada reference)","Simple compliance deadline structure (single date for all actions)","No nested exceptions or conditional logic beyond the basic if/then structure","Short document length (approximately 250 words of substantive content)"],"plain_english_summary":"This is a safety order for specific Bombardier Challenger regional jets. It requires airlines and aircraft operators to check whether the protective covers on two critical safety devices—the Flight Data Recorder (\"black box\" that records flight data) and Cockpit Voice Recorder (device that records cockpit conversations)—have a special chemical-resistant coating. If they don't, operators must either apply this protective coating to the existing covers or install new ones that already have it. This prevents damage from paint stripping chemicals that might be used during aircraft maintenance. All checks and fixes must be done by 28 June 2003."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping","history":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping/history","analysis":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping/analysis","conflicts":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping/conflicts","importantCases":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping/important-cases","documents":"/api/acts/ad-cl-600-48-cvr-fdr-paint-stripping/documents"}}