{"id":"F2008L01256","name":"AD/CL-600/96 - Stick Pusher Capstan Shaft","slug":"ad-cl-600-96-stick-pusher-capstan-shaft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73494,"registerId":"commonwealth-F2008L01256-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-600/96 | Stick Pusher Capstan Shaft | 5/2008 |\n| ------------ | -------------------------- | ------ |\n\n| Applicability: | Bombardier Inc. CL-600 aircraft:CL-600-1A11 (CL-600) - Serial numbers 1004 through 1085CL-600-2A12 (CL-601) - Serial numbers 3001 through 3066CL-600-2B16 (CL-601-3A/3R) - Serial numbers 5001 through 5194CL-600-2B16 (CL-604) - Serial numbers 5301 through 5665 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement: | 1. Amend all copies of the Aircraft Flight Manual (AFM) by incorporating the following applicable Temporary Revision (TR) and advise all flight crews on the changes introduced through the AFM TR.CL-600-1A11 (CL-600):PSP 600 DOT TR 600/24 dated Jan 30/07PSP 600-1 DOT TR 600-1/20 dated Jan 30/07CL-600-2A12 (CL-601):PSP 601-1A DOT TR 601/28 dated Jan 30/07PSP 601-1A-1 DOT TR 601/16 dated Jan 30/07PSP 601-1B DOT TR 601/20 dated Jan 30/07PSP 601-1B-1 DOT TR 601/15 dated Jan 30/07CL-600-2B16 (CL-601-3A/3R):PSP 601A-1 DOT TR 601/27 dated Jan 30/07PSP 601A-1-1 DOT TR 601/28 dated Jan 30/07CL-600-2B16 (CL-604):PSP 604-1 DOT TR 604/22 dated Jan 30/07 |\n\n```html\n

This AD is applicable to all Challenger 600, 601, 601-3A/3R, and 604 models. If the operator has an AFM that is not listed above, consult Bombardier Aerospace.

2. Amend the Transport Canada approved maintenance schedule by incorporating new inspection task as introduced by the following applicable Temporary Revisions:

A/C Model

TLMC Section

Chapter 5 task No.

Status

CL-604

5-10-40

27-35-10-101

TR 5-2-32

CL-601 3A/3R

5-10-30

27-39-00-104

TR 5-239

CL-601

5-10-30

27-39-00-104

TR 5-226

Cl-600

5-10-30

27-39-00-104

TR 5-138

Note: Transport Canada AD CF-2008-12 dated 8 February 2008 refers.

Compliance:

Within 30 days afters the effective date of this AD unless previously accomplished.

This Airworthiness Directive becomes effective on 8 May 2008.

Background:

There have been several Stick Pusher Capstan Shaft failures causing the dormant loss or severe degradation of the stick pusher function. This AD is issued to revise the first flight of the day check of the stall protection system to detect a degradation of the stick pusher function. It also introduces a new periodic maintenance task to check the structural integrity of the stick pusher capstan shaft.

\n```\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n6 March 2008","sortOrder":0},{"sectionNumber":"AD/CL-600/96","sectionType":"part","heading":"AD/CL-600/96","content":"## AD/CL-600/96","sortOrder":1},{"sectionNumber":"Stick Pusher Capstan Shaft","sectionType":"part","heading":"Stick Pusher Capstan Shaft","content":"## Stick Pusher Capstan Shaft","sortOrder":2},{"sectionNumber":"5/2008","sectionType":"part","heading":"5/2008","content":"## 5/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"The AD broadens the corrective approach: it revises the first-flight-of-day check to detect stick pusher degradation and adds a recurring structural inspection task for the capstan shaft. In other words, it moves from an operational check to also require a formal periodic maintenance action and AFM TR incorporation across the listed serial-number ranges (Background; Requirement 1 and 2, and the maintenance-task table)."},"complexity_factors":["Multiple aircraft models and many serial-number ranges are covered (Applicability), increasing the operator population affected.","Operators must incorporate several different Temporary Revisions into the AFM (Requirement 1) — each model has distinct TR documents.","Requirement to amend the Transport Canada–approved maintenance schedule by adding a new inspection task with specific TLMC sections and Chapter 5 task numbers (Requirement 2 and table) increases maintenance-program complexity.","Rigid compliance timeframe: actions required within 30 days after the AD’s effective date (Compliance) creates scheduling and resourcing pressure.","Operational change: advising flight crews and revising the first-flight-of-day check (Background / Requirement 1) imposes procedural and training actions.","If an operator’s AFM is not listed, the AD directs consultation with Bombardier Aerospace, adding administrative steps and potential dependence on manufacturer support (note in Requirement).","Cross-reference to Transport Canada AD CF-2008-12 may require coordination with foreign airworthiness authorities and reconciliation of maintenance records (Note).","The new task inspects structural integrity of a safety-critical component (stick pusher capstan shaft), which may require specialised maintenance skills, tooling or part replacement decisions (Background; Requirement 2)."],"plain_english_summary":"Requires Bombardier CL-600 family operators to update their Aircraft Flight Manual with specified Temporary Revisions and to add a new maintenance inspection task for the stick pusher capstan shaft. Applies to listed serial-number ranges for CL-600/601/601-3A/3R/604; operators must advise crews and amend the Transport Canada–approved maintenance schedule.\n\nThe AD states its purpose is to detect degradation of the stick pusher function and to add periodic structural inspections; compliance is required within 30 days of the AD’s effective date (see Requirement and Compliance)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original scope as a targeted safety directive addressing a specific mechanical failure mode in the stick pusher system. It does not expand beyond its original purpose of ensuring airworthiness through updated operational procedures and maintenance inspections."},"complexity_factors":["Multiple aircraft variants with different serial number ranges requiring different document references","Extensive cross-referencing to external documents (Temporary Revisions to Aircraft Flight Manuals and maintenance schedules)","Tabular data specifying different maintenance task numbers for each aircraft model","Nested applicability conditions (model → serial number → specific TR document)","Minor formatting inconsistencies in source document (duplicate headings, HTML table remnants)"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety fixes for certain Bombardier Challenger business jets (CL-600/601/604 series). It requires flight manual temporary revisions to change daily stall-protection checks and adds maintenance inspections of the stick pusher capstan shaft after reported unexpected failures. Affects listed aircraft owners/operators; compliance was required within 30 days of 8 May 2008."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft","history":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft/history","analysis":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft/analysis","conflicts":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft/conflicts","importantCases":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft/important-cases","documents":"/api/acts/ad-cl-600-96-stick-pusher-capstan-shaft/documents"}}