{"id":"F2006B02180","name":"AD/AC-112/10 - Fuel Tank Access Door Sealant - Replacement","slug":"ad-ac-112-10-fuel-tank-access-door-sealant-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41410,"registerId":"commonwealth-F2006B02180-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-112/10 - Fuel Tank Access Door Sealant - Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 12/1979,Aircraft below 5700 kg,Gulfstream (Rockwell) 112 Series Aeroplanes,Fuel Tank Access Door Sealant - Replacement,10\ntitle: Airworthiness Directive - AD/AC-112/10 - Fuel Tank Access Door Sealant - Replacement\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)  Gulfstream (Rockwell) 112 Series Aeroplanes\n\n \n\nAD/AC-112/10 Fuel Tank Access Door Sealant - Replacement 12/79\n\nApplicability: Models 112 and 112B with S/Nos. 13000, 3 to 537 and 539 to 544.\n\n \n\nModel 112TC with S/Nos. 13001 to 13108.\n\n \n\nModel 112TCA with S/Nos. 13150, 13151, 13153 to 13160, 13162 to 13276, 13301,\n\n13302 and 13304 to 13306.\n\n \n\nRequirement: Replace fuel tank access door sealant as detailed in Part II of Rockwell International SB No. SB-112-64.\n\n \n\nCompliance: Within 100 hours’ time in service after 31 December 1979.\n\n \n\nBackground:  After long term exposure to aviation fuel the fuel tank access door sealant may break down and cause contamination of the fuel filter and engine fuel system.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1679},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains focused on its original purpose: mandating a specific maintenance action to prevent fuel system contamination in identified aircraft models. No scope creep or expansion beyond the original safety intent is evident."},"complexity_factors":["Applicability determined by specific aircraft serial number ranges across four model variants","Single external reference to manufacturer Service Bulletin SB-112-64 for technical procedures","Compliance deadline calculated based on accumulated flight hours after a fixed date"],"plain_english_summary":"**What this does:** This is a mandatory safety notice requiring replacement of fuel tank sealant on specific Gulfstream (Rockwell) 112 series aircraft.\n\n**Who it affects:** Owners and operators of Model 112, 112B, 112TC, and 112TCA aircraft with the specific serial numbers listed in the directive.\n\n**Why it matters:** After long-term exposure to aviation fuel, the old sealant can deteriorate and break down, potentially contaminating the fuel system, clogging filters, and damaging engines.\n\n**What must be done:** Replace the fuel tank access door sealant following the instructions in Rockwell Service Bulletin SB-112-64, Part II. This maintenance must be completed within 100 flight hours (measured as \"time in service\") after 31 December 1979."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement","history":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement/history","analysis":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement/analysis","conflicts":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement/conflicts","importantCases":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement/important-cases","documents":"/api/acts/ad-ac-112-10-fuel-tank-access-door-sealant-replacement/documents"}}