{"id":"F2009L00510","name":"AD/CESSNA 560/10 - Angle of Attack System","slug":"ad-cessna-560-10-angle-of-attack-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77162,"registerId":"commonwealth-F2009L00510-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 560 (Citation V) Series Aeroplane","sectionType":"division","heading":"Cessna 560 (Citation V) Series Aeroplanes","content":"### Cessna 560 (Citation V) Series Aeroplanes\n\n| AD/CESSNA 560/10 | Angle of Attack System | 3/2009 |\n| ---------------- | ---------------------- | ------ |\n\n| Applicability: | Model 560 aeroplanes, serial numbers (S/Ns) 560-0001 through -0538 inclusive. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. If not previously accomplished in accordance with the optional terminating action of AD/CESSNA 560/9 (FAA AD 2007-23-13), carry out a functional test of the angle-of-attack (AOA) system and adjust the calibration settings of the AOA system as applicable, in accordance with Cessna Alert Service LetterASL560-34-34 (for aeroplanes equipped with a single AOA system) orASL560-34-35 (for aeroplanes equipped with a dual AOA system), both Revision 3, both dated 6 March 2008, both including attachments, as applicable. |\n| | Note 1: Maintenance Manual Revision 24 of Cessna 560 Maintenance Manual 56MM has been changed to reflect the intent of the ASLs for the maintenance actions and periodic inspections of the AOA/Stall Warning System. |\n| | 2. If not previously accomplished following completion of the optional terminating action of AD/CESSNA 560/9 (FAA AD 2007-23-13), submit the AOA system test data report for the functional test specified in Requirement 1 to:Glenn ToddCitation Customer Support EngineerDepartment 572P.O. Box 7706Wichita, KS 67277-7706e-mail: gatodd@cessna.textron.comfax +1-316-517- 8500 or +1-316-206-2337.The report must include the AOA test data, the aeroplane serial number and registration number together with the number of landings and flight hours on the aeroplane. |\n| | Accomplishing the functional test of the AOA system, adjusting the calibration settings of the AOA system as applicable and submitting the AOA system test data as specified in this Directive, terminates the requirement for the placard installation required by AD/CESSNA 560/9 (FAA AD 2007-23-13). |\n\n| | Actions accomplished before the effective date of this Directive in accordance with ASL560-34-34 or ASL560- 34-35, Revision 1 or Revision 2, dated 2 October 2007 and 11 January 2008 respectively, both including attachments, are considered acceptable for compliance with the corresponding action specified in this Directive. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | 3. For aeroplanes on which the Requirement 1 actions have been completed, revise the Limitations Section of the Aircraft Flight Manual (AFM) by removing the following warning statement: |\n| | “Warning: Stick Shaker May Not Activate Prior to Buffet/Roll-Off If Airspeed Is Reduced Below the Appropriate Minimum Speed.” |\n| | Later revisions of the above ASLs, approved by the FAA as an Alternate Method of Compliance (AMOC) to FAA AD 2008-26-04, are considered acceptable for compliance with the equivalent Requirements of this Directive. |\n| | Note 2: FAA AD 2008-26-04 Amdt 39-15770 refers. |\n| Compliance: | For Requirement 1 - Within six months after the effective date of this Directive. |\n| | For Requirement 2 - Within 30 days after doing the functional test. |\n| | For Requirement 3 - Within 30 days after completing the Requirement 1 actions or within 30 days after the effective date of this Directive, whichever occurs later. |\n| | This Airworthiness Directive becomes effective on 12 March 2009. |\n| Background: | This Directive supersedes AD/CESSNA 560/9 which will be cancelled six months after the effective date of this Directive. |\n| | AD/CESSNA 560/9 mandated the technical requirements of FAA AD 2007-23-13 which required temporary changes to the AFM and installation of a warning placard. The FAA AD also contained an optional terminating action. |\n| | This Directive whilst mandating the terminating action allows accomplishment in accordance with earlier versions of the applicable AWLs and submittal of reports if completed prior to the effective date of this Directive. The Directive also requires amendment of the AFM. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 January 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 560/10","sectionType":"part","heading":"AD/CESSNA 560/10","content":"## AD/CESSNA 560/10","sortOrder":1},{"sectionNumber":"Angle of Attack System","sectionType":"part","heading":"Angle of Attack System","content":"## Angle of Attack System","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"This Directive supersedes AD/CESSNA 560/9 and makes the previously optional terminating action mandatory by requiring the AOA functional test, any necessary calibration, and submission of test data (Requirements 1–2; Background). It cancels the earlier AD six months after the effective date, and allows prior completion under earlier ASL revisions to be accepted (Actions accomplished before the effective date)."},"complexity_factors":["Targeted applicability to a narrow serial-number range (S/Ns 560-0001 through -0538) increases administrative tracking burden (Applicability).","Multiple mandatory actions with distinct deadlines: functional test/calibration (Requirement 1), data submission (Requirement 2), and AFM revision (Requirement 3) (Requirements; Compliance).","Dependence on external normative documents: Cessna Alert Service Letters ASL560-34-34 and ASL560-34-35 (Revision 3) and cross-reference to FAA ADs (Requirement 1; Note 2; Background).","Different procedures for single vs dual AOA systems (Requirement 1) create technical variance in compliance workscopes.","Reporting obligation requires specific data (AOA test data, serial number, registration, landing and flight hours) and submission to a named Cessna contact, creating a record-keeping and communication burden (Requirement 2).","Interaction with and supersession of a prior Directive (AD/CESSNA 560/9), including cancellation of the earlier AD after six months, introduces transitional timing and potential overlap issues (Background).","Acceptability of earlier ASL revisions if actions were completed before the effective date adds legal nuance to retrospective compliance (Actions accomplished before the effective date).","Removal of an AFM limitation/warning upon completion requires aircraft paperwork change management (Requirement 3)."],"plain_english_summary":"This Directive requires operators of Cessna 560 (Citation V) aeroplanes S/N 560-0001 through -0538 to perform a functional test and, if needed, recalibrate the angle-of-attack (AOA) system per specified Cessna Alert Service Letters, and to submit the AOA test data to Cessna. Completing these tasks removes a temporary AFM warning and ends the prior placard requirement. It replaces an earlier AD and shifts the testing, calibration and reporting obligations to aircraft owners/operators."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This directive maintains its original scope as a targeted safety fix for the Cessna 560 AOA system. While it references multiple previous directives and offers alternative compliance paths, it remains focused on its core purpose: mandating the permanent terminating action for a known stall warning system defect. The inclusion of grandfathering provisions for work already done does not expand the substantive scope beyond the original safety intent."},"complexity_factors":["Multiple cross-references to previous directives (AD/CESSNA 560/9, FAA AD 2007-23-13, FAA AD 2008-26-04) and service letters (ASL560-34-34, ASL560-34-35)","Conditional logic based on whether previous optional terminating actions were accomplished","Dual applicability tracks depending on single vs. dual AOA system configuration","Specific revision numbers and dates for acceptable compliance documents (Revision 1, 2, or 3 of service letters)","Nested timing requirements with 'whichever occurs later' clauses","International compliance coordination requiring submission to US-based manufacturer"],"plain_english_summary":"This AD requires owners/operators of early Cessna 560 (serials 560-0001–560-0538) to test and recalibrate the angle-of-attack/stall-warning system, submit the test data to Cessna, and remove a temporary cockpit/flight-manual warning once the permanent fix is done. \n\nIt replaces a temporary placard-based mitigation with a lasting correction so pilots will receive reliable stick-shaker stall warnings, addressing a safety risk where stall warning could have been inadequate."},"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-cessna-560-10-angle-of-attack-system","history":"/api/acts/ad-cessna-560-10-angle-of-attack-system/history","analysis":"/api/acts/ad-cessna-560-10-angle-of-attack-system/analysis","conflicts":"/api/acts/ad-cessna-560-10-angle-of-attack-system/conflicts","importantCases":"/api/acts/ad-cessna-560-10-angle-of-attack-system/important-cases","documents":"/api/acts/ad-cessna-560-10-angle-of-attack-system/documents"}}