{"id":"F2006B05307","name":"AD/CESSNA 208/12 - Flap Outboard Support","slug":"ad-cessna-208-12-flap-outboard-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45735,"registerId":"commonwealth-F2006B05307-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 208/12 - Flap Outboard 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 208/12 Flap Outboard Support 6/95\n\nApplicability: Cessna 208 (Caravan 1) series aeroplanes:\n\nModels 208 and 208A: S/N 20800001 to 20800227 inclusive Model 208B: S/N 208B0001 to 208B0336 inclusive.\n\nRequirement: 1. Visually inspect the outboard flap support rib flanges at WS 214.30 in accordance with Cessna Service Bulletin (SB) CAB93-11, Accomplishment Instructions.\n\n2. Install modifications SK208-109-1 (left flap) and SK208-109-2 (right flap) in accordance with Cessna SB CAB93-11, Accomplishment Instructions.\n\nCompliance: 1. Inspect before 2000 hours time in service or before 50 hours time in service after 25 May 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 CAB93-11.\n\nInstallation of SK208-109-1 and SK208-109-2 (Requirement 2) cancels the inspection requirements of this AD.\n\n2. Install the modifications before 500 hours time in service after initial inspection in accordance with Requirement 1 or before 100 hours time in service after 25 May 1995, whichever occurs later.\n\nBackground: Fatigue testing has shown the potential for cracks to develop in the outboard flap support rib structure. Failure of this structure could result in 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 fatigue issue in defined aircraft models. It has not expanded beyond its original purpose of mandating inspection and repair of outboard flap supports."},"complexity_factors":["Multiple conditional compliance deadlines ('whichever occurs later' logic appears twice)","Cross-reference to external technical document (Cessna Service Bulletin CAB93-11) for detailed procedures","Interdependent requirements: Requirement 2 (modification) cancels Requirement 1 (inspections)","Specific serial number ranges for three model variants requiring careful identification","Technical aviation terminology requiring domain knowledge (WS 214.30, time in service, SK208-109-1/2)"],"plain_english_summary":"This mandatory CASA AD affects specified Cessna 208/208A/208B serial numbers and requires visual inspections of the outboard flap support rib flanges for cracks by specified flight‑hour thresholds, with 100‑hour repeat inspections unless a permanent modification kit is installed within the AD’s stated time limits. It addresses fatigue cracking that could cause flap loss and a serious accident, so operators must either inspect periodically or fit the kits to eliminate recurring inspections."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD’s scope aligns with its stated purpose: detect and remedy fatigue cracking in the outboard flap support ribs for the listed Cessna 208 serial-number ranges. It imposes inspection requirements until specific modification kits are installed, and does not extend obligations beyond inspection, repair per SB CAB93‑11, and eventual modification (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability tied to specific models and serial number ranges (Models 208/208A S/N 20800001–20800227; 208B S/N 208B0001–208B0336) — requires accurate fleet identification (Applicability).","Dual-stage obligations: recurring visual inspections per SB CAB93‑11 (Requirement 1) with specified intervals and triggers, plus mandatory installation of two listed modification kits (Requirement 2) that cancel further inspections (Requirement/Compliance).","Time-in-service deadlines and interval structure: initial inspection required before 2000 TIS or within 50 hours after 25 May 1995, re-inspect every 100 hours; mods required before 500 TIS after initial inspection or within 100 hours after 25 May 1995 — requires operators to track flight hours precisely (Compliance).","Reference to an external document (Cessna SB CAB93‑11) for inspection/repair detail and numbered ‘Compliance’ paragraphs if cracks are found — creates dependency on the SB’s procedures for substantive compliance actions (Requirement/Background).","Conditional remedial path: discovery of cracks triggers SB-specified compliance actions rather than uniform mandated repairs in the AD text, introducing some variation in on-aircraft work (Compliance).","Operational impact concentrated on affected aircraft owners/operators who bear costs and scheduling burdens; regulator discretion limited because the AD specifies actions and SB as the method, not broad discretionary standards (Requirement/Compliance)."],"plain_english_summary":"This directive requires owners/operators of specified Cessna 208/208A/208B serial numbers to inspect the outboard flap support rib flanges per Cessna Service Bulletin CAB93‑11 and to install modification kits SK208‑109‑1 (left) and SK208‑109‑2 (right). Mechanically, it mandates recurring inspections until the modification is fitted, and fitting the mods cancels the inspection requirement.\n\nOperators pay for inspections and the modifications, must track hours-in-service to meet deadlines, and must follow the SB’s repair steps if cracks are found to address fatigue risk to the flap support."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-208-12-flap-outboard-support","history":"/api/acts/ad-cessna-208-12-flap-outboard-support/history","analysis":"/api/acts/ad-cessna-208-12-flap-outboard-support/analysis","conflicts":"/api/acts/ad-cessna-208-12-flap-outboard-support/conflicts","importantCases":"/api/acts/ad-cessna-208-12-flap-outboard-support/important-cases","documents":"/api/acts/ad-cessna-208-12-flap-outboard-support/documents"}}