{"id":"F2006B07309","name":"AD/TB10/7 - Battery Tray Installation","slug":"ad-tb10-7-battery-tray-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49305,"registerId":"commonwealth-F2006B07309-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TB10/7 - Battery Tray Installation","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\nAD/TB10/7 Battery Tray Installation 10/85\n\nApplicability: All models TB9 and TB10 series with S/nos up to 441 but excluding S/nos 343, 382, 414, 423, 425 to 429 and 434 to 438.\n\n \n\nRequirement: Inspect and modify the battery tray installation in accordance with the requirements detailed in Socata Service Letter No. 18 under description paragraph 1. Pay particular attention to surrounding fuselage structure for signs of electrolyte spillage and subsequent damage.\n\n \n\nNote: French AD 85-130-(A) refers.\n\n \n\nCompliance: Within 50 hours time in service after 31 October 1985.\n\n \n\nBackground:  The battery tray installation may be such that electrolyte spillage from the battery could cause fuselage structural damage due to corrosion.\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, time-bound safety directive from 1985 addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly used ('time in service' — standard aviation term)","No cross-references to other legislation or regulations beyond a single reference to a French AD and a manufacturer service letter","Single, straightforward compliance requirement with clear applicability criteria","No conditional logic, exceptions, or nested provisions","Binary applicability test (serial number ranges only)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Socata TB9 and TB10 Tobago aeroplanes** (small aircraft) with certain serial numbers.\n\n**What it requires:**\n- Owners/operators must **inspect and modify the battery tray** (the compartment holding the aircraft's battery) following specific instructions from the manufacturer (Socata Service Letter No. 18).\n- They must **check the surrounding fuselage structure** for damage caused by battery acid (electrolyte) leaking or spilling.\n\n**Why it matters:**\nBattery acid can leak and **corrode the aircraft's metal frame**, potentially weakening the structure and creating a safety risk. This directive forces a fix before that damage becomes dangerous.\n\n**Deadline:**\nThe work had to be done **within 50 hours of flying time after 31 October 1985**.\n\n**Who it affects:**\nPilots, aircraft owners, and maintenance organisations operating these specific Tobago aircraft models."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive, as written, applies to specified TB9/TB10 serial numbers and mandates inspection/modification per Socata Service Letter No. 18 to prevent electrolyte-induced corrosion, with compliance within 50 hours after 31 October 1985. The text contains no amendment language or indication that the applicable scope has been increased or narrowed from an earlier version."},"complexity_factors":["Targeted applicability with serial-number inclusions and multiple exclusions increases administrative checking (Applicability).","Technical actions are defined by an external manufacturer document (Socata Service Letter No. 18), creating dependency on that document for implementation details (Requirement).","Short compliance window (within 50 hours TIS after 31 Oct 1985) raises scheduling and operational impact (Compliance).","Requires inspection for corrosion and potential structural repair, which can reveal variable additional costs (Requirement; Background).","Mandate is issued by the Civil Aviation Safety Authority and therefore enforceable by regulator (header/context)."],"plain_english_summary":"This airworthiness directive requires owners/operators of specified Aerospatiale (Socata) TB9 and TB10 aircraft (certain serial numbers listed and several excluded) to inspect and modify the battery tray installation per Socata Service Letter No. 18, and to check surrounding fuselage for corrosion from possible electrolyte spillage. Compliance was mandated within 50 hours time-in-service after 31 October 1985. The directive places the cost and action burden on aircraft owners/operators and is enforceable by the aviation regulator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-7-battery-tray-installation","history":"/api/acts/ad-tb10-7-battery-tray-installation/history","analysis":"/api/acts/ad-tb10-7-battery-tray-installation/analysis","conflicts":"/api/acts/ad-tb10-7-battery-tray-installation/conflicts","importantCases":"/api/acts/ad-tb10-7-battery-tray-installation/important-cases","documents":"/api/acts/ad-tb10-7-battery-tray-installation/documents"}}