{"id":"F2006B05306","name":"AD/CESSNA 208/11 - Flap Support","slug":"ad-cessna-208-11-flap-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45732,"registerId":"commonwealth-F2006B05306-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 208/11 - Flap Support","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 208 Series Aeroplanes\n\nAD/CESSNA 208/11 Flap Support 5/95\n\nApplicability: Cessna Caravan 1 aeroplanes\n\nModels 208 and 208A: S/N 20800001 to 20800206 inclusive Model 208B: S/N 208B0001 to 208B0276 inclusive\n\nRequirement: 1. Visually inspect the flap supports at WS 53.00 and WS 126.50 in accordance with Cessna Service Bulletin (SB) CAB92-16, Revision 2, Accomplishment Instructions.\n\n2. Install modifications SK208-92B1 (left flap) and SK208-92B2 (right flap) in accordance with Cessna SB CAB92-16, Revision 2, Accomplishment Instructions.\n\nCompliance: 1. Inspect before 2000 hours time in service or before 50 hours time in service after 27 April 1995, whichever occurs later. Re-inspect at intervals not to exceed 100 hours time in service.\n\nIf cracks are found, comply with the numbered “Compliance” paragraphs of Cessna SB CAB92-16, Revision 2.\n\nInstallation of SK208-92B1 and SK208-92B2 (Requirement 2) cancels the inspection requirements of this AD.\n\n    2. Install the modifications:\n\n    (a) before 500 hours time in service after initial inspection in accordance with Requirement 1 or before 100 hours time in service after 27 April 1995, whichever occurs later; or\n\n    (b) before 100 landings after installation of SK208-92A3 or SK208-92A4, whichever occurs first.\n\nNote: Kits SK208-92A3 and SK208-92A4 are an interim repair for cracking of flap support ribs; Cessna SB CAB92-16, Revision 2, refers.\n\nBackground: Service experience has shown the potential for cracks to develop in the flap support structure. Failure of this structure could mean loss of the flap and possible loss of the aeroplane.","sortOrder":0}],"analysis":{"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 is a discrete, targeted safety directive addressing a specific structural defect in specific aircraft models. It has not expanded beyond its original purpose of mandating inspection and repair of Cessna 208 series flap supports."},"complexity_factors":["Multiple conditional deadlines using 'whichever occurs later/first' logic (4 separate timing triggers)","Cross-reference to external technical document (Cessna Service Bulletin CAB92-16, Revision 2) for actual inspection procedures","Interdependency between requirements: Requirement 2 (modification) cancels Requirement 1 (inspections)","Reference to prior interim repair kits (SK208-92A3/A4) creating an alternative compliance path","Technical aviation terminology requiring domain knowledge (e.g., 'WS 53.00', 'time in service', 'S/N')"],"plain_english_summary":"This CASA Airworthiness Directive applies to certain Cessna Caravan 1s (208/208A/208B with specified serial numbers). It mandates recurring visual inspections of two flap support fittings for cracks and requires eventual installation of left/right reinforcement kits to permanently fix the issue. The rule is legally mandatory because undetected cracking can lead to flap separation and loss of control; once modified, repetitive inspections end."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD's scope remains focused on flap-support inspection and retrofit for the listed Cessna Caravan 1 serial numbers to address cracking risk. The text shows no change or expansion of the targeted population or obligations beyond the stated inspections, interim repairs, and mandatory kit installations."},"complexity_factors":["Serial-number-limited applicability across multiple model/serial ranges increases record-keeping and fleet-tracking burden (Applicability).","Mandatory reference to an external technical document (Cessna SB CAB92-16 Rev 2) means procedural detail is not in the AD and requires access to and interpretation of the SB (Requirement 1, Requirement 2).","Layered compliance timings: initial inspection deadlines, recurring 100‑hour inspection intervals, and separate deadlines for kit installation create scheduling complexity (Compliance).","Conditional compliance paths: if cracks are found, operators must follow numbered compliance paragraphs in the SB rather than the AD itself, adding decision points and potential variability in corrective action (Compliance).","Two installation-compliance alternatives and interim repair kits (SK208‑92A3/A4) introduce tracking for hours-in-service and landings metrics and multiple repair states to manage (Requirement 2; Note).","Safety-critical nature increases enforcement, documentation and potential grounding risk until corrective action is completed (Background; Compliance).","Parts-specific retrofit requirement (SK208‑92B1/B2) creates procurement, certification of installation and potential downtime costs for operators (Requirement 2)."],"plain_english_summary":"**Mandates inspections and a retrofit** for specified Cessna 208-series Caravan 1 aeroplanes. Owners/operators must visually inspect flap supports per Cessna Service Bulletin CAB92‑16 Rev 2 and install modification kits SK208‑92B1 (left) and SK208‑92B2 (right); installing the kits ends the repetitive inspection requirement. Operators and maintenance organisations are responsible for meeting the stated time‑in‑service and landing limits and for the costs and downtime needed to reduce the risk of flap‑support cracking and possible loss of the flap or aeroplane."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-208-11-flap-support","history":"/api/acts/ad-cessna-208-11-flap-support/history","analysis":"/api/acts/ad-cessna-208-11-flap-support/analysis","conflicts":"/api/acts/ad-cessna-208-11-flap-support/conflicts","importantCases":"/api/acts/ad-cessna-208-11-flap-support/important-cases","documents":"/api/acts/ad-cessna-208-11-flap-support/documents"}}