{"id":"F2008L00398","name":"AD/CL-600/94 - Fuel Tank Lightning Protection","slug":"ad-cl-600-94-fuel-tank-lightning-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119052,"registerId":"commonwealth-F2008L00398-current","compilationNumber":null,"startDate":"2026-04-03","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-600/94 | Fuel Tank Lightning Protection | 3/2008 |\n| ------------ | ------------------------------ | ------ |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial numbers 7003 through 7067, and 7069 through 7929. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | Modify bonding jumpers inside the wing and centre fuel tanks, according to the Accomplishment Instructions of Bombardier Service Bulletin (SB) 601R-28-055, Revision D, dated 17 July 2006, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. |\n| | Note 1: Modification of bonding jumpers according to the original issue, Revision A or Revision B of the above noted SB DOES NOT satisfy the requirements of this Directive. |\n| | Note 2: Transport Canada AD CF-2007-34 refers. |\n| Compliance: | Within 5000 hours time in service after the effective date of this Directive. |\n| | This Airworthiness Directive becomes effective on 13 March 2008. |\n| Background: | 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 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.This assessment showed that there is insufficient electrical bonding for lightning protection at certain locations inside the fuel tanks. In addition, the assessment also revealed that existing bonding jumpers across self-bonded couplings are not required. Insufficient electrical bonding, if not corrected, could result in arcing and potential ignition source inside the fuel tank during lightning strikes and consequent fuel tank explosion. |\n\n| | To correct the unsafe condition, this Directive mandates the modification of certain bonding jumpers inside the fuel tanks. |\n| --- | --------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n21 January 2008","sortOrder":0},{"sectionNumber":"AD/CL-600/94","sectionType":"part","heading":"AD/CL-600/94","content":"## AD/CL-600/94","sortOrder":1},{"sectionNumber":"Fuel Tank Lightning Protection","sectionType":"part","heading":"Fuel Tank Lightning Protection","content":"## Fuel Tank Lightning Protection","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety defect in a specific aircraft type. The scope remains precisely limited to the identified lightning protection deficiency in the CL-600-2B19 fuel system. No scope creep is evident."},"complexity_factors":["Single, specific technical requirement with clear applicability criteria (specific model and serial number ranges)","Only 2 defined technical references (the Service Bulletin and Transport Canada AD)","Simple compliance timeline (5000 hours from effective date)","Minimal conditional logic — essentially 'if you own this specific aircraft, you must do this specific modification'","Clear safety rationale in background section with straightforward causal chain (insufficient bonding → arcing → explosion)","No nested exceptions or complex cross-referencing to other legislation beyond the referenced service bulletin"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specified Bombardier Challenger CL‑600‑2B19 (S/N 7003–7067, 7069–7929) to upgrade electrical bonding jumpers in wing and centre fuel tanks to prevent lightning‑induced arcing and possible fuel‑tank ignition. Modifications must follow the Transport Canada‑approved service bulletin (Revision D or later) within 5,000 flight hours of 13 March 2008."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The directive implements the corrective action identified in Bombardier's fuel‑system safety review to remedy insufficient electrical bonding inside fuel tanks (Background). It is narrowly scoped to specified CL-600-2B19 serial numbers and a defined modification procedure (Applicability; Requirement), with a fixed compliance window of 5,000 flight hours (Compliance). The text does not indicate any divergence from that original corrective intent; discretionary elements are limited to acceptance of later SB revisions only if approved by the Chief, Continuing Airworthiness, Transport Canada (Requirement)."},"complexity_factors":["Technical safety work inside fuel tanks (electrical bonding and lightning protection) requires specialist maintenance procedures and access to fuel tanks (Requirement; Background).","Mandatory reference to a specific service bulletin revision (SB 601R-28-055 Revision D dated 17 July 2006) and allowance only for later revisions approved by the Chief, Continuing Airworthiness, Transport Canada creates document-control complexity (Requirement).","Note excluding earlier SB revisions (original issue, Revision A or B) increases compliance precision and creates risk of non‑conformance if incorrect revision is used (Note 1).","Applicability limited to a defined serial-number range (Model CL-600-2B19 s/n 7003–7067, 7069–7929) requires accurate fleet identification and record checks (Applicability).","Compliance measured in flight hours (within 5,000 hours time in service) imposes operational planning and tracking burdens on operators (Compliance).","Cross-reference to Transport Canada AD CF-2007-34 links this directive to foreign regulator action and may require harmonised records or approvals (Requirement; Note 2).","Effective date and enforcement timing (becomes effective 13 March 2008) requires scheduling within existing maintenance cycles (Compliance).","Implicit certification/approval steps for modifications and any post‑mod work inspections involve regulatory oversight and sign‑off by authorised personnel (Requirement — approval by Chief, Continuing Airworthiness, Transport Canada)."],"plain_english_summary":"This directive requires operators of Bombardier CL-600-2B19 aircraft (serial numbers 7003–7067 and 7069–7929) to modify bonding jumpers inside the wing and centre fuel tanks to meet a specific Bombardier Service Bulletin (SB 601R-28-055 Rev D or later TC‑approved revision). Transport Canada identified insufficient electrical bonding that could allow arcing during lightning strikes; the rule mandates the corrective work within 5,000 flight hours and assigns the compliance responsibility to aircraft operators and their maintenance organisations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection","history":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection/history","analysis":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection/analysis","conflicts":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection/conflicts","importantCases":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection/important-cases","documents":"/api/acts/ad-cl-600-94-fuel-tank-lightning-protection/documents"}}