{"id":"F2009L02259","name":"AD/CL-600/110 - Flap Actuator Pinion Gear","slug":"ad-cl-600-110-flap-actuator-pinion-gear","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":162107,"registerId":"commonwealth-F2009L02259-current","compilationNumber":null,"startDate":"2026-04-04","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-600/110 | Flap Actuator Pinion Gear | 7/2009 |\n| ------------- | ------------------------- | ------ |\n\n| Applicability: | All Bombardier Inc Model CL-600-2B19 aircraft, serial number (S/N) 7003 and subsequent, equipped with Inboard Flap Actuators Part Number (P/N) 601R93101-21 (Eaton P/N 852D100-21) or P/N 601R93101-25 (Eaton P/N 852D100-25). |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. a. Inspect the S/N of each of the Flap Actuators P/N 601R93101-21 andP/N 601R93101-25 installed on the aircraft.b. If the serial number of the inspected actuator is listed below, replace the Flap Actuator with the P/N 601R93101-21 or P/N 601R93101-25 that does not have one of the following serial numbers:Part Number 601R93101-217772, 7773, 7774, 7775, 7776, 7778, 7779, 7780, 7781, 7782, 7784, 7786, 7787, 7788, 7790, 7791, 7793, 7797, 7798, 7799, 7801, 7802, 7803, 7804, 7805, 7806, 7807, 7808, 7810, 7813, 7815, 7816, 7817, 7818, 7819, 7820, 7821, 7825, 7826,7827, 7828, 7829Part Number 601R93101-257783, 7796Note 1: Replacing the existing Flap Actuator P/N 601R93101-21 with the P/N 601R93101-25 that does not have a serial number listed in paragraph (B) of this AD also satisfies the requirement of Part A of this directive.Note 2: Serial number verification of the affected actuator conducted by a review of the aircraft maintenance records also satisfies Requirement 1 of this AD.2. a. Inspect the S/N of each of the Flap Actuators P/N 601R93101-25 installed on the aircraft.b. If the S/N is listed below, replace the Flap Actuator with P/N 601R93101-25 that does not have one of the following serial numbers:3278, 3401, 3512, 3526, 3597, 3599, 3606, 3738, 3806, 3861, 4066, 4284, 4315, 4401, 4499, 4538, 4582, 4658, 4979, 5007, 5094, 6422, 6969, and 7867 |\n\n| | Note 3: Serial number verification of the affected actuator conducted by a review of the aircraft maintenance records also satisfies Requirement 2 of this AD.3. Replacement of Flap Actuator P/N 601R93101-21 or 601R93101-25 with serial numbers listed in Requirement 1 and 2 of this AD is not allowed on any aircraft unless the serial numbers of the Actuators listed in Requirement 1 of this AD are identified with suffix “A”, and those Actuators listed in Requirement 2 of this AD are identified with suffix “B”.Note 4: Serial number suffix “A” or “B” indicates that a conforming gear set has been installed.Note 5: Transport Canada AD CF-2009-13 dated 26 March 2009 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | For Requirement 1.a. - Within 100 flight cycles from the effective date of this AD.For Requirement 1.b. - Before further flight.For Requirement 2.a. - Within 500 flight cycles from the effective date of this AD.For Requirement 2.b. - Before further flight.For Requirement 3 - As of the effective date of this AD. |\n| | This Airworthiness Directive becomes effective on 2 July 2009. |\n| Background: | A number of Flap Actuators with P/N 601R93101-21 and 601R93101-25 were identified as having pinion gears that did not have acceptable certificates of conformance from the supplier. This condition could result in flap failure. To correct this, operators are required to replace the Inboard Flap Actuators that are non-conforming. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n22 May 2009","sortOrder":0},{"sectionNumber":"AD/CL-600/110","sectionType":"part","heading":"AD/CL-600/110","content":"## AD/CL-600/110","sortOrder":1},{"sectionNumber":"Flap Actuator Pinion Gear","sectionType":"part","heading":"Flap Actuator Pinion Gear","content":"## Flap Actuator Pinion Gear","sortOrder":2},{"sectionNumber":"7/2009","sectionType":"part","heading":"7/2009","content":"## 7/2009","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":4,"scope_assessment":{"changed":false,"description":"This AD maintains a narrow, targeted scope focused specifically on the identified flap actuator defect. It does not expand beyond the original safety purpose of addressing non-conforming pinion gears in the specified aircraft model."},"complexity_factors":["Multiple overlapping part numbers (P/N 601R93101-21 and P/N 601R93101-25) with different serial number lists","Cross-referencing between Requirements 1 and 2 with specific serial number ranges (47 serial numbers for first part, 23 for second)","Conditional logic: replacement allowed only if specific suffixes (\"A\" or \"B\") are present, creating an exception to the prohibition","Alternative compliance methods noted (maintenance records review satisfies inspection requirements)","Staggered compliance deadlines (100 flight cycles vs 500 flight cycles vs \"before further flight\")","Technical aviation terminology requiring specialized knowledge (flight cycles, part numbers, serial number suffixes)"],"plain_english_summary":"This AD orders operators of Bombardier CL-600-2B19 jets to inspect inboard flap actuator serial numbers against two suspect lists and to remove and replace any listed actuators before further flight. Reinstallation is prohibited unless units are modified and re‑marked.\n\nIt responds to flap actuators with pinion gears lacking supplier quality certificates—risking flap failure—and sets compliance windows of 100–500 flight cycles; effective 2 July 2009."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive implements corrective action limited to identified flap actuator pinion gears on specified CL-600-2B19 aircraft (Applicability; Requirement; Background). It does not broaden to other components or aircraft types and confines measures to inspection, replacement and marking of affected actuators."},"complexity_factors":["Many long, explicit serial‑number lists to check and compare (Requirement 1.b; Requirement 2.b).","Two affected part numbers with overlapping but different serial lists and a cross‑replacement option (Requirements 1 and 2; Note 1).","Staged compliance times: short window for one set (100 flight cycles) and longer for the other (500 flight cycles), plus 'before further flight' for replacement actions (Compliance).","Prohibition on reinstalling affected actuators unless marked with suffix 'A' or 'B' that denotes a conforming gear set, adding tracking/marking burden (Requirement 3; Notes 4–5).","Acceptable serial verification via maintenance-records review reduces physical inspection burden but increases reliance on record accuracy (Notes 2 and 3).","Cross-reference to Transport Canada AD introduces external regulatory linkage (Note 5)."],"plain_english_summary":"This Directive requires operators of Bombardier CL-600-2B19 (S/N 7003 onwards) fitted with inboard flap actuators P/N 601R93101‑21 or ‑25 to inspect actuator serial numbers and replace any units listed as non‑conforming. Replacements must not bear the listed serials; re‑installs are prohibited unless the actuator serial carries suffix “A” or “B” showing a conforming gear set.\n\nOperators pay inspection and replacement costs, must meet deadlines (100 or 500 flight cycles, or replacement before further flight), may verify serials via maintenance records, and the action targets flap failure risk from missing supplier certificates."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear","history":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear/history","analysis":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear/analysis","conflicts":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear/conflicts","importantCases":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear/important-cases","documents":"/api/acts/ad-cl-600-110-flap-actuator-pinion-gear/documents"}}