{"id":"F2005L01483","name":"AD/CL-600/65 - Control Column Microphone Jack Modification - FAA STC SA4900SW","slug":"ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35350,"registerId":"commonwealth-F2005L01483-current","compilationNumber":null,"startDate":"2026-04-01","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-600/65 | Control Column Microphone JackModification - FAA STC SA4900SW | 8/2005 TX |\n| ------------ | ------------------------------------------------------------- | --------- |\n\n```html\n

Applicability:

Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601) and CL-600-2B16
(CL-601-3A, CL-601-3R, and CL- 604) aeroplanes; modified by United States federal Aviation Administration (FAA) Supplemental Type Certificate (STC) SA4900SW, excluding serial number 3025 and including, but not limited to, the following serial numbers:

Model
CL-600-1A11 (CL-600)
CL-600-2A12 (CL-601)

CL-600-2B16 (CL-601-3A, CL-601-3R and CL-604)

Serial Numbers
1054, 1059, 1069, 1071, 1080
3012, 3013, 3034, 3045, 3050, 3051, 3061, 3065
5012, 5046, 5060

Requirement:

1. Revise the Limitations and Normal Procedures section of the Aircraft Flight manual (AFM) to contain the following information:

\"Before every flight, perform a visual check of the microphone jack assembly on the pilot's and co-pilot's control column to detect damage that may interfere with movement of the control column, including downward bending of the receptacle. This check must be performed by the flight crew. Any damage that may interfere with the movement of the control column must be repaired before further flight.\"

Revision of the AFM may be accomplished by inserting a copy of this Directive in the AFM.

Note 1: Bombardier Advisory Wire AW600-00-2247, Revision 2, dated March 24, 2005, provides additional information on damaged microphone jack assemblies and interference of damaged assemblies with movement of the control column.

2. Modify the microphone jack assembly and perform all related investigative actions and applicable corrective actions, in accordance with the Accomplishment Instructions of Raytheon Service Bulletin SB 23-3727, dated May 2005, except as provided by Requirement 3. Once this modification is complete, the AFM revision required by Requirement 1 may be removed from the AFM.

\n```\n\n| | 3. If any cracking is found during any inspection required by this Directive or if the distance between existing and new fastener holes is less than the limit specified in Raytheon Service Bulletin SB 23-3727, dated May 2005, repair the cracking or carry out any other applicable corrective action. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Note 2: Contact Raytheon Aircraft Company Arkansas Technical Support in accordance with SB 23-3727 for advice regarding repair or corrective action. |\n| | Note 3: FAA AD 2005-11-04 Amdt 39-14106 refers. |\n| Compliance: | For Requirement 1 - Within five days after the effective date of this Directive. |\n| | For Requirement 2: |\n| | a. If damage that may interfere with the movement of the control column is found during any visual check performed in accordance with the AFM revision - Before further flight. |\n| | b. If damage that may interfere with the movement of the control column is not found during any visual check performed in accordance with the AFM revision - Within 15 days or 15 hours time in service after the effective date of this Directive, whichever occurs first. |\n| | For Requirement 3 - Before further flight immediately following discovery of the anomaly. |\n| | This Airworthiness Directive becomes effective on 16 June 2005. |\n| Background: | This Directive is issued to prevent a damaged microphone jack assembly from interfering with movement of the control column, which could result in loss of control of the aeroplane.The FAA has received a report indicating that a Model CL-600-1A11 (CL-600) aeroplane experienced a rejected take-off and subsequently overran the runway. The nose landing gear collapsed, and the forward fuselage was damaged as a result of the incident. The flight crew reported that, when they attempted to take off, the control column would not move aft beyond the neutral position. Investigation revealed that the microphone jack assembly installed on the co-pilot's control column was bent downward, which restricted the aft movement of the control column. |\n\n| | The microphone jack assembly on the affected aeroplane was installed incidental to STC SA4900SW. Therefore, all Bombardier Model CL-600-1A11 (CL-600),CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R and CL-604) aeroplanes modified by that STC may be subject to the same unsafe condition. |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n10 June 2005","sortOrder":0},{"sectionNumber":"AD/CL-600/65","sectionType":"part","heading":"AD/CL-600/65","content":"## AD/CL-600/65","sortOrder":1},{"sectionNumber":"Control Column Microphone JackModificati","sectionType":"part","heading":"Control Column Microphone JackModification - FAA STC SA4900SW","content":"## Control Column Microphone Jack \nModification - FAA STC SA4900SW","sortOrder":2},{"sectionNumber":"8/2005 TX","sectionType":"part","heading":"8/2005 TX","content":"## 8/2005 TX","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains a narrow, targeted scope addressing a specific unsafe condition (microphone jack interference with control columns) on a limited fleet of aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific technical subject matter (microphone jack modification)","Clear two-stage compliance structure (temporary AFM revision, then permanent modification)","Limited applicability — only 16 specific aircraft serial numbers affected","Straightforward conditional logic (if damage found → immediate action; if no damage → 15 days/15 hours)","References external technical documents (Raytheon Service Bulletin SB 23-3727, FAA AD 2005-11-04) but provides sufficient standalone instruction","No nested definitions or extensive interpretation sections","Simple effective date and compliance timeline structure"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires specific safety actions for certain Bombardier Challenger business jets.\n\n**What it does:**\n- **Requires pilots to check** the microphone jack on their control columns (the steering wheel-like device) before every flight to look for damage that could jam the controls.\n- **Mandates a permanent hardware fix** — modifying the microphone jack assembly according to a specific service bulletin.\n- **Sets deadlines** for when these checks and fixes must happen.\n\n**Who it affects:**\n- Owners and operators of specific Bombardier CL-600 series aircraft (models CL-600, CL-601, CL-601-3A, CL-601-3R, and CL-604) that were modified under a specific US FAA certification (STC SA4900SW).\n- Specifically applies to 16 aircraft with listed serial numbers.\n\n**Why it matters:**\nA damaged microphone jack had already caused one aircraft to crash during takeoff — the pilots couldn't pull back on the controls because the bent microphone jack was physically blocking movement. This directive prevents that dangerous situation from happening again by requiring visual checks immediately and a permanent repair within 15 days or flight hours."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive stays within the original safety purpose: prevent a damaged microphone jack assembly from restricting control-column movement. It targets the subset of CL-600 series aeroplanes modified by STC SA4900SW and prescribes short-term procedural controls (AFM insertion and inspections) and a hardware modification/repairs per an OEM service bulletin. It does not broaden scope beyond that safety objective or add unrelated obligations; applicability is narrowly tied to the STC-modified airframes and specific serial numbers."},"complexity_factors":["Short, focused Airworthiness Directive (AD) limited to a single hardware item (microphone jack assembly)","Three discrete requirements: AFM revision (Requirement 1), modification per Raytheon SB 23-3727 (Requirement 2), and repair criteria for cracking/fastener spacing (Requirement 3)","Conditional compliance windows: 5 days for AFM insertion; immediate repair before further flight if damage found; 15 days or 15 flight hours if no damage found","Cross-references to external documents (Raytheon Service Bulletin SB 23-3727; Bombardier Advisory Wire AW600-00-2247; FAA AD 2005-11-04) that contain technical detail and repair instructions","Applicability limited to aircraft modified by a specific STC (SA4900SW) with explicit serial-number listing and one serial-number exclusion (3025) — requires accurate fleet STC records","A note advising contact with Raytheon technical support for repairs (operational dependency on OEM support)","No extensive defined-term list or multi-part exceptions; text is procedural and concise"],"plain_english_summary":"This directive requires operators of Bombardier CL-600-1A11/2A12/2B16 aeroplanes modified by FAA STC SA4900SW to insert a short AFM revision mandating a pre-flight visual check of the pilot/co‑pilot microphone jack for damage, and to complete a Raytheon SB 23-3727 modification (and any repairs) if issues or cracking are found. It affects flight crews, maintenance organisations and aircraft operators, aims to prevent jack-related control‑column interference after a reported incident, and imposes short compliance windows and operator costs for inspection, repair and downtime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw","history":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw/history","analysis":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw/analysis","conflicts":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw/conflicts","importantCases":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw/important-cases","documents":"/api/acts/ad-cl-600-65-control-column-microphone-jack-modification-faa-stc-sa4900sw/documents"}}