{"id":"F2006B03749","name":"AD/BEECH 23/35 - Flap Control Assembly","slug":"ad-beech-23-35-flap-control-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43343,"registerId":"commonwealth-F2006B03749-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/35 - Flap Control Assembly","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 19, 23 and 24 Series Aeroplanes\n\n \n\nAD/BEECH 23/35 Flap Control Assembly 4/78\n\nApplicability: All Models: 23, A23, A23A, B23 & C23 with s/Nos. M-1 to M-1979; A23-19, 19A & B19 with S/Nos. MB-1 to MB-866. A23-24 & A24 with S/Nos. MA-1 to MA-368 and A24R, B24R & C24R with S/Nos. MC-2 to MC-536.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0940.\n\n \n\nNote: FAA AD 78-04-01 Amdt. 39-3139 refers.\n\n \n\nCompliance: 1. Inspect at intervals not exceeding 100 hours time in service until modified.\n\n \n\n2. Modify before 1 January 1979.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1978 with a specific compliance deadline (1 January 1979). It has not expanded beyond its original purpose of addressing a specific airworthiness concern with the flap control assembly on defined Beechcraft models. The scope remains tightly constrained to the original safety issue."},"complexity_factors":["Single, specific mechanical system addressed (flap control assembly)","Clear applicability criteria (specific aircraft models and serial number ranges)","Simple two-part compliance structure (repetitive inspection + one-time modification)","No defined terms section or complex interpretive provisions","No nested exceptions or conditional logic","References external technical document (Beechcraft SI) rather than reproducing detailed specifications inline","Short document (approximately 150 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Beechcraft aeroplane models** (the 19, 23 and 24 series with particular serial numbers).\n\n**What it does:**\n- Requires owners and operators of these aircraft to **inspect the flap control assembly** (the mechanical system that controls the flaps — the movable surfaces on the wings that help with take-off and landing)\n- These inspections must happen **every 100 hours of flight time** until a permanent modification is made\n- The aircraft must be **permanently modified before 1 January 1979**\n\n**Who it affects:**\n- Owners and operators of the specified Beechcraft aircraft models\n- Maintenance engineers working on these aircraft\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They are issued when a safety defect is discovered that could affect flight safety. Non-compliance means the aircraft cannot legally fly. This particular directive addresses a specific mechanical issue with the flap control system that, if unaddressed, could potentially compromise safe operation of the aircraft.\n\nThe directive references a **Beechcraft Service Instruction (SI No. 0940)** — this is the manufacturer's technical document detailing exactly what inspection and modification work needs to be done."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD, as published, sets out a specific, limited scope: inspection at ≤100-hour intervals until a mandated modification is completed, and a fixed calendar deadline to complete that modification. The text provided does not indicate any change from that original scope: it applies to the listed models/serial numbers, requires compliance with Beechcraft SI No. 0940, and prescribes the inspection interval and modification deadline (Applicability; Requirement; Compliance 1 & 2)."},"complexity_factors":["Narrow technical scope limited to flap control assembly for specific Beechcraft models and serial-number ranges (Applicability).","Mandatory actions are simple in number but require external technical documentation: inspections at fixed intervals and a prescribed modification (Requirement; Compliance 1 & 2).","Reference to an external manufacturer document (Beechcraft SI No. 0940) means the AD’s implementation depends on that separate technical instrument (Requirement).","Cross-reference to an FAA airworthiness directive introduces an external regulatory reference for background or alignment (Note).","Time-bound compliance deadline (modify before 1 January 1979) combined with ongoing inspection intervals creates a two-part compliance schedule (Compliance 1 & 2)."],"plain_english_summary":"This AD requires owners/operators of specified Beechcraft Model 19, 23 and 24 serial-numbered aeroplanes to perform inspections of the flap control assembly every ≤100 flight hours until each aircraft is modified per Beechcraft Service Instruction No. 0940 — the modification must be completed before 1 January 1979. It targets a safety issue (see related FAA AD), places costs and scheduling burden on operators, and creates an incentive to complete the one‑time modification to avoid recurring inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-35-flap-control-assembly","history":"/api/acts/ad-beech-23-35-flap-control-assembly/history","analysis":"/api/acts/ad-beech-23-35-flap-control-assembly/analysis","conflicts":"/api/acts/ad-beech-23-35-flap-control-assembly/conflicts","importantCases":"/api/acts/ad-beech-23-35-flap-control-assembly/important-cases","documents":"/api/acts/ad-beech-23-35-flap-control-assembly/documents"}}