{"id":"F2006B03817","name":"AD/BEECH 35/11 Amdt 2 - Spar Truss","slug":"ad-beech-35-11-amdt-2-spar-truss","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43413,"registerId":"commonwealth-F2006B03817-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/11 Amdt 2 - Spar Truss","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)  \nBeechcraft 35 (Bonanza) Series Aeroplanes\n\nAD/BEECH 35/11\n\nAmdt 2\n\n  \nSpar Truss 8/81\n\nApplicability: Models 35 and 35R with S/Nos. D1 to D1500.\n\nRequirement: 1. Provide five access doors in the fuselage skin below the mainplane forward truss assembly in accordance with Beech SB Model 35 (35R) No. 24, revised 5 November 1963.\n\n    2. Inspect the mainplane centre section front and rear spar truss assemblies in accordance with Beech SB Model 35 (35R) No. 24, revised 5 November 1963. For aircraft modified in accordance with FAA STC SA222CE (Mainplane Centre Section Reinforcement), inspect in accordance with STC SA222CE installation instructions Sheet 3.\n\nNote: FAA AD 63-25-1 also refers.\n\nCompliance: For Para 1. Prior to the first inspection in accordance with this Directive.\n\nFor Para 2. Prior to issue or renewal of Certificate of Airworthiness and thereafter:\n\n    (a) For aircraft modified in accordance with STC SA222CE \\-at intervals not exceeding 1000 hours time in service, or three years, whichever occurs sooner.\n\n    (b) For all other aircraft \\- as specified in Beech SB Model 34 (35R) No. 24 revised 5 November 1963, or at intervals not exceeding three years, whichever occurs sooner.\n\nBackground: This Directive has been revised to allow extended inspection intervals for aircraft fitted with wing centre section reinforcement modification to FAA STC SA222CE.","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":true,"description":"The original directive (implied by 'Amendment 2') has been revised to expand its scope to accommodate aircraft modified under FAA STC SA222CE. Originally, all aircraft likely followed the same inspection schedule. Amendment 2 introduces a dual-track compliance system: reinforced aircraft get extended 1000-hour/3-year intervals versus the original shorter intervals. This represents a scope expansion from a one-size-fits-all mandate to a differentiated approach based on modification status."},"complexity_factors":["Short, single-purpose document (2 pages)","Only 4 defined terms/models referenced (serial number range, STC reference, SB reference)","Simple conditional logic: two inspection tracks based on modification status (STC SA222CE)","Clear compliance deadlines with straightforward alternatives (hours OR years)","Minimal cross-referencing: one FAA AD reference, one Service Bulletin reference, one STC reference","No nested exceptions or layered definitions"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of early Beechcraft 35/35R Bonanza aeroplanes (serials D1–D1500) to enable and carry out regular inspections of the wing spar truss assemblies by fitting inspection access doors and performing periodic checks. It targets maintenance personnel and aircraft operators.\n\nIt matters because the spar truss is a primary structural attachment for the wings; timely inspection prevents fatigue or corrosion failures. A 2023 amendment extends inspection intervals for aircraft with an approved reinforcement."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Revision permits extended inspection intervals for aircraft fitted with the wing centre section reinforcement (FAA STC SA222CE). The core requirements (access doors and recurring spar truss inspections) remain, but the AD now differentiates intervals by modification status, reducing inspection frequency for STC‑modified aircraft."},"complexity_factors":["Applicability narrowly limited to Models 35 and 35R with serial numbers D1–D1500, which requires operators to confirm eligibility before acting.","Two distinct mandatory actions: (1) retrofit five access doors to the fuselage skin; (2) recurring inspections of front and rear spar truss assemblies, increasing procedural steps and costs.","Different compliance timing rules: door retrofit required prior to the first inspection; inspections required prior to issue/renewal of Certificate of Airworthiness and thereafter on intervals that vary by modification status.","Two inspection regimes: unmodified aircraft follow Beech SB No. 24 (rev 5 Nov 1963) (or intervals not exceeding three years), while aircraft modified under FAA STC SA222CE follow STC Sheet 3 and may use 1,000 hours or three years, whichever is sooner—operators must track which regime applies.","Normative references to external documents (Beech SB No. 24 rev. 5 Nov 1963; FAA STC SA222CE installation instructions; FAA AD 63-25-1) create dependence on other sources for procedural detail and raise administrative effort to obtain and follow those documents.","Operational impact and costs fall on owners/operators (retrofit labour and inspection downtime); enforcing authorities must verify compliance before Certificates of Airworthiness are issued or renewed."],"plain_english_summary":"This airworthiness directive requires Beechcraft Model 35 and 35R aeroplanes (S/N D1–D1500) to have five access doors fitted under the mainplane forward truss and to undergo recurring inspections of the mainplane centre‑section front and rear spar truss per Beech Service Bulletin No. 24 (rev. 5 Nov 1963) or, for aircraft modified by FAA STC SA222CE, per the STC installation instructions. It matters to owners/operators because they must pay for the retrofits and periodic inspections; aircraft with the STC qualify for longer inspection intervals."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-11-amdt-2-spar-truss","history":"/api/acts/ad-beech-35-11-amdt-2-spar-truss/history","analysis":"/api/acts/ad-beech-35-11-amdt-2-spar-truss/analysis","conflicts":"/api/acts/ad-beech-35-11-amdt-2-spar-truss/conflicts","importantCases":"/api/acts/ad-beech-35-11-amdt-2-spar-truss/important-cases","documents":"/api/acts/ad-beech-35-11-amdt-2-spar-truss/documents"}}