{"id":"F2008L03618","name":"AD/CL-600/97 Amdt 1 - Enhancement to Takeoff Operational Safety Margins","slug":"ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75261,"registerId":"commonwealth-F2008L03618-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-600/97 Amdt 1 | Enhancement to Takeoff Operational Safety Margins | 12/2008 DM |\n| ------------------- | ------------------------------------------------- | ---------- |\n\n| Applicability: | Bombardier Inc. Model CL-600-2B19 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. a. Amend the Aircraft Flight Manual (AFM) by inserting Temporary Revision (TR) RJ/155-5, dated 7 August 2008 or later approved revision; andb. Insert a copy of this Airworthiness Directive in the AFM; andc. Advise all flight crews on the changes introduced through the AFM TR.2. Review the “Pilot’s Checklist” to ensure that the instructions regarding selection of the wing anti-ice system to “ON”, as specified in the AFM Limitations Section, are incorporated.Note: Canadian Airworthiness Directive No. CF-2008-15R1 dated 20 August 2008 refers.                                                                                                                                                                                                                                                         |\n| Compliance:    | Within 14 days after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n|                | This Amendment becomes effective on 6 October 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | Following three recent events where Bombardier CL-600-2B19/CL-600-2B16 aircraft experienced un-commanded roll during take-off, it has been determined that it is necessary to further enhance the AFM limitations and procedures to ensure safe operation, particularly in cold weather or icing conditions.This AD mandates the introduction of additional limitations and procedures to the current AFM and requires that any Operators’ Pilot’s checklists fully reflect these procedures. In order not to compromise the takeoff operational safety margin, strict adherence to all the AFM procedures and limitations is required.This amendment introduces the latest revision to the AFM. The latest AFM revision requires specific pilot training with regard to enhanced take-off procedures and winter operations. |\n\n|     | The original issue of this AD became effective 13 March 2008. |\n| --- | ------------------------------------------------------------- |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n30 September 2008","sortOrder":0},{"sectionNumber":"AD/CL-600/97 Amdt 1","sectionType":"part","heading":"AD/CL-600/97 Amdt 1","content":"## AD/CL-600/97 Amdt 1","sortOrder":1},{"sectionNumber":"Enhancement to Takeoff Operational Safet","sectionType":"part","heading":"Enhancement to Takeoff Operational Safety Margins","content":"## Enhancement to Takeoff Operational Safety Margins","sortOrder":2},{"sectionNumber":"12/2008 DM","sectionType":"part","heading":"12/2008 DM","content":"## 12/2008 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment expands and tightens the original AD by mandating insertion of Temporary Revision RJ/155-5 into the AFM, placing the AD in the AFM, advising all flight crews, and requiring pilot checklist changes and specific pilot training to address uncommanded roll events during takeoff. The text thus broadens operational and training obligations compared with the original issue (see Requirement and Background)."},"complexity_factors":["Short mandatory compliance period: 14 days from effective date (Compliance).","Multiple operational actions required: AFM amendment, insertion of the AD into the AFM, crew notification, and checklist review (Requirement 1a–1c, 2).","Mandatory pilot training referenced but not specified in detail: AFM revision requires \"specific pilot training\" (Background).","\"Or later approved revision\" language permits use of later revisions, creating regulatory/approval discretion (Requirement 1a).","Applicability limited to a single model (CL-600-2B19), concentrating obligations on affected operators (Applicability).","Cross-reference to Canadian AD CF-2008-15R1 may introduce variation in related documentation or interpretations (Requirement Note).","Operational impact in cold/icing: changes alter crew procedures during takeoff, with attendant training and operational costs (Background, Requirement 2).","No explicit verification or record-keeping procedure specified in the text, leaving enforcement/inspection method open (Requirement, Compliance)."],"plain_english_summary":"This directive requires operators of Bombardier CL-600-2B19 aircraft to update the Aircraft Flight Manual by inserting Temporary Revision RJ/155-5 (or a later approved revision), place a copy of the AD in the AFM, advise all flight crews of the changes, and ensure pilot checklists require wing anti‑ice to be ON for relevant takeoffs. Compliance is required within 14 days and the amendment is effective 6 October 2008.\n\nThe change responds to uncommanded roll events during takeoff in cold/icing conditions and adds AFM limitations, procedures and specific pilot training to protect takeoff safety margins."},"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 AD maintains its original scope as a targeted safety directive for CL-600-2B19 takeoff procedures. The amendment updates the specific flight manual revision required but does not expand beyond the original purpose of addressing uncommanded roll incidents during takeoff in icing conditions."},"complexity_factors":["Single specific aircraft model (CL-600-2B19) with narrow applicability","Straightforward three-part requirement structure (manual update, directive insertion, crew notification)","Single cross-reference to Canadian aviation directive CF-2008-15R1","Clear compliance deadline (14 days from effective date)","No nested exceptions or conditional logic — requirements apply uniformly","Minimal defined terms (only standard aviation acronyms: AFM, TR, AD)","Short document length (approximately 300 words of substantive content)"],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier CL-600-2B19 (Challenger) aircraft to amend flight manuals and pilot checklists with new takeoff procedures for cold/icy conditions after three incidents of unexpected roll. It mandates using wing anti‑ice and related precautions to prevent loss of control.\n\nIt’s urgent: affected operators must insert the temporary revision, brief crews, and align checklists within 14 days — otherwise the aircraft should not be flown."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins","history":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins/history","analysis":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins/analysis","conflicts":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins/conflicts","importantCases":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins/important-cases","documents":"/api/acts/ad-cl-600-97-amdt-1-enhancement-to-takeoff-operational-safety-margins/documents"}}