{"id":"F2006B04185","name":"AD/BEECH 77/1 - Wing Attachment Bolts and Nutplates","slug":"ad-beech-77-1-wing-attachment-bolts-and-nutplates","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43938,"registerId":"commonwealth-F2006B04185-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 77/1 - Wing Attachment Bolts and Nutplates","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 77 (Skipper) Series Aeroplanes\n\n \n\nAD/BEECH 77/1 Wing Attachment Bolts and Nutplates 2/80 Applicability:  All model 77 with S/Nos. WA-1 to WA-39, WA-41, WA-42 and WA-44 to WA-46. Requirement:  Action in accordance with Beechcraft SI No. 1088.\n\nCompliance:   Unless already accomplished, prior to further flight.\n\n \n\nBackground: It is possible that thread damage may have occurred to the wing attach bolts and/or the internal nut plates.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1980 (as indicated by \"2/80\" in the reference). It addresses one specific mechanical defect in one specific aircraft type. There is no evidence of scope creep; the document remains tightly focused on its original safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 4 defined elements: specific aircraft model, serial number range, reference to external technical document (Beechcraft SI No. 1088), and compliance deadline","No nested conditional logic or exceptions","Single straightforward requirement with immediate compliance deadline","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Purpose-built for operational clarity — designed to be understood by aircraft mechanics and pilots, not lawyers"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of small aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Beechcraft 77 \"Skipper\" aeroplanes** to inspect and potentially fix a problem with the **wing attachment bolts and nutplates** (the hardware that literally holds the wings onto the fuselage).\n\n**Who it affects:**\n- Owners and operators of Beechcraft 77 aircraft with specific serial numbers: WA-1 through WA-39, plus WA-41, WA-42, and WA-44 through WA-46.\n\n**Why it matters:**\n- **Safety critical.** The directive addresses possible **thread damage** to the bolts and internal nutplates that attach the wings. If these fail, the wing could separate from the aircraft in flight — obviously catastrophic.\n- **Immediate action required.** The compliance deadline is **\"prior to further flight\"** unless the work has already been done. This is aviation-speak for \"ground the plane until fixed.\"\n- **Follow the manufacturer's instructions.** Operators must carry out the specific actions detailed in **Beechcraft Service Instruction No. 1088** (a technical bulletin from the plane's maker).\n\nIn short: If you own one of these specific Beechcraft Skippers, you cannot fly it until you check and fix the wing bolts as instructed."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD does not expand or narrow scope beyond what it states: it applies only to the listed Beechcraft 77 serial numbers (Applicability) and makes compliance with Beechcraft SI No. 1088 mandatory prior to further flight (Requirement; Compliance). There is no indication in the text provided that the AD alters its own originally-stated applicability or requirement."},"complexity_factors":["Narrow applicability limited to specific Beechcraft 77 serial numbers (Applicability)","Single mandatory action that references an external manufacturer Service Instruction (Beechcraft SI No. 1088) rather than prescribing technical steps in the AD itself (Requirement)","Immediate compliance deadline: must be done prior to further flight (Compliance)","Dependence on availability and content of the external SI increases practical compliance logistics (Requirement)","No multiple compliance options, exemptions, or staged timeframes specified in the AD (low procedural complexity)"],"plain_english_summary":"This AD applies to specified Beechcraft 77 (Skipper) serial numbers and makes Beechcraft Service Instruction No. 1088 mandatory to inspect and, if needed, rectify wing attach bolts and internal nutplates because of possible thread damage.  \n\nCompliance is required before the next flight, so owners/operators bear inspection/repair costs and may face immediate grounding and maintenance scheduling to restore airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates","history":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates/history","analysis":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates/analysis","conflicts":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates/conflicts","importantCases":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates/important-cases","documents":"/api/acts/ad-beech-77-1-wing-attachment-bolts-and-nutplates/documents"}}