{"id":"F2007L04272","name":"AD/CL-600/88 - Fuel System Safety - Electrical Bonding","slug":"ad-cl-600-88-fuel-system-safety-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70508,"registerId":"commonwealth-F2007L04272-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Canadair) CL-600 (Challenger","sectionType":"division","heading":"Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes","content":"### Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n| AD/CL-600/88 | Fuel System Safety - Electrical Bonding | 12/2007 |\n| ------------ | --------------------------------------- | ------- |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial numbers 7003 through 7067 and 7069 through 7797.                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Carry out a detailed visual inspection for the presence of an anodised (blue colour) fuel boost pump reducer coupling according to the Accomplishment Instructions of Bombardier Service Bulletin (SB) 601R-28-057, dated4 December 2003, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. If the inspection reveals that none of the fuel boost pump reducer coupling is anodised, no further action is required by this Directive. |\n|                | 2. If the Requirement 1 inspection reveals the presence of any anodised fuel boost pump reducer coupling, replace the anodised coupling with a coupling having ion vapour deposition (IVD) coating according to the Accomplishment Instructions of SB 601R-28-057 or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.                                                                                                                      |\n|                | Note: Transport Canada AD CF-2007-18 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Compliance:    | For Requirement 1 - Within 5 000 hours time in service after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                           |\n|                | For Requirement 2 - Prior to further flight after the Requirement 1 inspection.                                                                                                                                                                                                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 22 November 2007.                                                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | Transport Canada has advised that Bombardier Aerospace has completed a system safety review of the CL-600-2B19 aircraft fuel system against new fuel tank safety standards introduced in Chapter 525 of the Transport Canada Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non-compliances were assessed using Transport Canada Policy Letter No. 525 001 to determine if mandatory corrective action is required.                |\n\n|     | The assessment showed that if the fuel boost pump reducer coupling is anodised, insufficient electrical bonding between the boost pump canister and the pressure pick-up line could occur. Insufficient electrical bonding between the boost pump canister and the pressure pick-up line, if not corrected, could result in arcing and potential ignition source inside the fuel tank during lightning strikes and consequent fuel tank explosion. To correct the unsafe condition, this Directive mandates a detailed visual inspection of the fuel boost pump for the presence of anodised reducer couplings. All anodised couplings found are to be replaced with couplings having IVD coating. |\n| --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n24 September 2007","sortOrder":0},{"sectionNumber":"AD/CL-600/88","sectionType":"part","heading":"AD/CL-600/88","content":"## AD/CL-600/88","sortOrder":1},{"sectionNumber":"Fuel System Safety - Electrical Bonding","sectionType":"part","heading":"Fuel System Safety - Electrical Bonding","content":"## Fuel System Safety - Electrical Bonding","sortOrder":2},{"sectionNumber":"12/2007","sectionType":"part","heading":"12/2007","content":"## 12/2007","sortOrder":3}],"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":"The directive is narrowly scoped to address a specific electrical-bonding non-compliance: anodised fuel boost pump reducer couplings on identified CL-600-2B19 serial numbers. It mandates inspection and replacement with IVD-coated couplings per Bombardier service instructions and Transport Canada approval. There is no indication in the text that the Directive expands beyond that identified unsafe condition or the listed serial-number population."},"complexity_factors":["Targeted, single-component technical requirement (inspect/replace reducer couplings) — limited procedural complexity.","Applicability restricted to a defined serial-number range, requiring fleet-specific identification.","Two-step compliance timing: inspection within 5,000 flight-hours; replacement required prior to further flight if anodised couplings are found.","Reliance on external documents: Bombardier Service Bulletin (SB 601R-28-057) and later revisions approved by the Chief, Continuing Airworthiness, Transport Canada, introduces dependency on external approvals and potential revision ambiguity.","Safety-critical consequence (fuel-tank ignition risk) raises operational urgency and potential for immediate grounding of affected aircraft until replacement is completed.","Compliance costs (inspection labour, parts, and replacement) are borne by aircraft owners/operators."],"plain_english_summary":"Requires operators of Bombardier CL-600-2B19 aircraft (serials 7003–7067 and 7069–7797) to inspect fuel boost pump reducer couplings for an anodised (blue) finish and replace any anodised couplings with ion vapour deposition (IVD) coated couplings. The measure addresses a risk that anodised couplings can cause poor electrical bonding that may allow arcing during lightning and create an ignition source in the fuel tank. Owners/operators must carry out the inspection within 5,000 flight-hours and replace any anodised couplings before further flight; the regulator prescribes compliance via Bombardier service instructions and Transport Canada approval."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific fuel system safety defect identified through Transport Canada's safety review. It has not expanded beyond its original purpose of correcting the electrical bonding issue in the specified aircraft series."},"complexity_factors":["Single, specific technical requirement with clear conditional logic (if-then structure)","Only 2 compliance deadlines: one for inspection (5,000 hours), one for replacement (immediate)","Limited applicability — specific aircraft model and serial number range only","References external technical document (Service Bulletin) but provides clear alternative path if no defect found","No nested exceptions or complex cross-referencing to other legislation","Technical terminology present but explained (anodised, IVD coating, electrical bonding)"],"plain_english_summary":"CASA requires operators of Bombardier Challenger CL-600-2B19 aircraft (s/n 7003–7067, 7069–7797) to inspect fuel boost pump “reducer” couplings and replace any blue anodised couplings with IVD‑coated parts.\n\nAnodised couplings can prevent proper electrical bonding and increase the risk of lightning‑induced ignition in the fuel tank; any anodised couplings must be replaced before further flight in accordance with the Bombardier service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding","history":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding/history","analysis":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding/analysis","conflicts":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding/conflicts","importantCases":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding/important-cases","documents":"/api/acts/ad-cl-600-88-fuel-system-safety-electrical-bonding/documents"}}