{"id":"F2006B07287","name":"AD/TB10/2 - Horizontal Stabilizer Rivets - Inspection and Modification","slug":"ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49245,"registerId":"commonwealth-F2006B07287-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TB10/2 - Horizontal Stabilizer Rivets - Inspection and Modification","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)  Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes\n\n \n\n# AD/TB10/2 Horizontal Stabilizer Rivets - Inspection\n\nand Modification Applicability: All models TB.9 and TB.10 with s/Nos. prior to 172. Document:               Rallye TB SB No. 8 GR.55-07.\n\n# 8/81\n\nCompliance: 1. Initially inspect within 25 hours time in service after 23 June 1981 and thereafter at intervals not exceeding 100 hours time in service until all rivets referenced in SB No. 8 have been replaced.\n\n \n\n2. Modify by replacement of rivets in accordance with requirement document within 300 hours time in service after 23 June 1981.\n\n \n\nBackground:  Service experience has shown that certain rivets in the horizontal stabilizer are prone to work loose.\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 classic, narrowly-scoped airworthiness directive focused on a specific mechanical defect in specific aircraft models. The scope remains tightly constrained to the original safety issue (loose horizontal stabilizer rivets) and has not expanded beyond this original purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined compliance requirements (inspection intervals and modification deadline)","Single applicability criterion (serial numbers prior to 172)","No nested exceptions or conditional logic","Single external document reference (Service Bulletin No. 8)","Clear, time-based compliance structure (hours 'time in service')"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Socata TB9 and TB10 Tobago aeroplanes** (specifically those with serial numbers before 172) to inspect and eventually replace faulty rivets in the horizontal stabilizer (the small wing at the tail of the plane that keeps it level).\n\n**Who it affects:**\n- Owners and operators of affected Socata TB9 and TB10 aircraft\n- Maintenance engineers working on these planes\n\n**What must be done:**\n1. **Inspection:** Check the rivets within 25 flight hours after 23 June 1981, then re-check every 100 flight hours until all rivets are replaced\n2. **Modification:** Replace the rivets completely within 300 flight hours after 23 June 1981\n\n**Why it matters:**\nService experience showed these rivets were prone to **\"work loose\"** (become loose from vibration and stress). Loose rivets in the horizontal stabilizer could compromise the aircraft's structural integrity and control, creating a serious flight safety risk. This AD ensures the problem is caught early and fixed permanently.\n\n**Key document reference:**\nOperators must follow **Rallye TB Service Bulletin No. 8 GR.55-07** for the exact technical procedures."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument's scope is confined by its own text to TB.9 and TB.10 aeroplanes with serial numbers prior to 172 and to the specified rivet inspection/replacement requirements. The document contains no indication that the covered population or the substantive requirements were expanded or narrowed beyond what the AD states."},"complexity_factors":["Limited applicability to TB.9 and TB.10 aircraft with serial numbers prior to 172 (Applicability)","Clear, short compliance timeframes: initial inspection 25 hours TIS after 23 June 1981, then ≤100‑hour intervals until replacement (Compliance 1)","Definitive modification deadline: rivet replacement within 300 hours TIS after 23 June 1981 (Compliance 2)","Procedural reliance on an external service bulletin for how to modify (Rallye TB SB No. 8 GR.55‑07) (Document reference)","Ongoing inspection obligation until modification is complete, creating recurring operational/maintenance scheduling (Compliance 1)","Stated safety reason limited to rivets 'prone to work loose' (Background) — factual trigger but no expanded regulatory mechanisms"],"plain_english_summary":"This airworthiness directive requires owners/operators of Aerospatiale (Socata) TB.9 and TB.10 (Tobago) aeroplanes with serial numbers before 172 to inspect specified horizontal stabilizer rivets (initially within 25 hours TIS after 23 June 1981, then every 100 hours until replaced) and to replace those rivets in accordance with Rallye TB SB No. 8 GR.55‑07 within 300 hours TIS. CASA states the action responds to service reports that certain stabilizer rivets are prone to working loose; operators bear inspection, part and maintenance costs and must schedule recurring checks until replacement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification","history":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification/history","analysis":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification/analysis","conflicts":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification/important-cases","documents":"/api/acts/ad-tb10-2-horizontal-stabilizer-rivets-inspection-and-modification/documents"}}