{"id":"F2006B08277","name":"AD/CESSNA 340/31 Amdt 1 - Main Landing Gear Wheel Bay Wing Rib and Wing Skin","slug":"ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115592,"registerId":"commonwealth-F2006B08277-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 340/31 Amdt 1 - Main Landing Gear Wheel Bay Wing Rib and Wing Skin","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 340 Series Aeroplanes\n\nAD/CESSNA 340/31\n\nAmdt 1\n\n  \n\nMain Landing Gear Wheel Bay Wing Rib and Wing Skin\n\n  \n10/95\n\nApplicability: Cessna 340 aircraft Serial Numbers 340-0001 to 340A0002.\n\nRequirement: Inspect the main landing gear side brace upper support attach bolts for correct torque.\n\nClean and do a close visual inspection of the main landing gear wheel well ribs in accordance with Cessna Service Letter (SL) ME76-2.\n\nVisually inspect the wing upper surface skin in the overwing baggage locker for cracking. Pay particular attention to the inboard side of the locker.\n\nCompliance: Initially inspect before 100 hours time in service after 20 July 1995 or before further flight after 14 September 1995.\n\nRe-inspect at intervals not to exceed 100 hours time in service.\n\nInstallation of Cessna Service Kit SK414-8E or repair to a scheme acceptable to the Authority cancels the Requirement of this Directive.\n\nThis Amendment is effective from 14 September 1995.\n\nBackground: There have been five reports of cracking of main landing gear wheel well ribs on Australian registered aircraft. In a number of cases cracks have also been reported in the wing upper surface skin in the baggage locker. Extensive cracking of the wing ribs could result in collapse of the main landing gear.\n\nThis Amendment adds repairs acceptable to the Authority as suitable terminating action.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The amendment explicitly adds \"repairs acceptable to the Authority\" as suitable terminating action in addition to installation of Cessna Service Kit SK414-8E, expanding allowable compliance options and introducing CASA discretion over acceptable repair schemes (effective 14 September 1995)."},"complexity_factors":["Narrow applicability to specific serial numbers (340-0001 to 340A0002) focuses compliance but requires operators to check applicability.","Technical tasks: torque check of attach bolts and close visual inspections of wheel well ribs and wing skin (references Cessna Service Letter ME76-2).","Recurring compliance interval: re-inspection every 100 hours time in service.","Dependency on manufacturer documentation and parts: cites Cessna SL ME76-2 and Service Kit SK414-8E.","Termination condition introduces regulatory discretion: repairs that are \"acceptable to the Authority\" cancel the directive.","Time-critical deadlines for initial compliance (before 100 hours after 20 July 1995 or before further flight after 14 September 1995) create operational scheduling pressure.","Safety consequence (risk of main landing gear collapse) raises urgency and potential cost of non‑compliance."],"plain_english_summary":"This airworthiness directive requires owners/operators of Cessna 340 aircraft (serials 340-0001 to 340A0002) to inspect main landing gear side‑brace upper support attach bolts for correct torque, closely inspect wheel well ribs per Cessna Service Letter ME76-2, and visually check the overwing baggage locker upper skin for cracking. Initial checks must meet set deadlines and then repeat every 100 hours; fitting Service Kit SK414-8E or an Authority‑approved repair cancels the inspections. It matters because reported cracking could lead to main landing gear collapse, so operators must pay for inspections, repairs, or kit installation and follow CASA-approved remedies."},"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 amendment maintains the original scope of the Airworthiness Directive. It adds an optional terminating action (installation of Service Kit SK414-8E or Authority-approved repairs) to the existing inspection requirements, but does not expand the applicability to new aircraft types or introduce new categories of requirements. The change is procedural — offering a path to end recurring inspections — rather than a scope expansion."},"complexity_factors":["Short, single-purpose document (1 page) focused on one specific mechanical issue","Only 4 defined applicability criteria (aircraft model and serial number range)","Simple conditional structure: basic requirement → compliance deadline → re-inspection interval → terminating action","Minimal cross-referencing (only references to Cessna Service Letter ME76-2 and Service Kit SK414-8E)","No nested exceptions or complex logical operators","Clear, sequential layout with distinct sections (Applicability, Requirement, Compliance, Background)"],"plain_english_summary":"This CASA Airworthiness Directive mandates urgent and recurring inspections and corrective actions on specific Cessna 340s (S/N 340-0001 through 340A0002) after reported cracking that could lead to main-gear collapse. It targets wheel-well ribs, gear side-brace fastening and adjacent wing skin areas to address an immediate safety risk.\n\nAffected owners, operators and maintenance engineers must comply within the short time limits and every 100 flight hours thereafter; Amendment 1 allows terminating action by installing Cessna SK414-8E or an approved alternative repair."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin","history":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin/history","analysis":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin/analysis","conflicts":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin/conflicts","importantCases":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin/important-cases","documents":"/api/acts/ad-cessna-340-31-amdt-1-main-landing-gear-wheel-bay-wing-rib-and-wing-skin/documents"}}