{"id":"F2006B02181","name":"AD/AC-112/11 - Elevator and Rudder Hinge Fittings - Inspection and/or Replacement","slug":"ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41411,"registerId":"commonwealth-F2006B02181-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-112/11 - Elevator and Rudder Hinge Fittings - Inspection and/or 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 3/1980,Aircraft below 5700 kg,Gulfstream (Rockwell) 112 Series Aeroplanes,Elevator and Rudder Hinge Fittings - Inspection and/or Replacement,11\ntitle: Airworthiness Directive - AD/AC-112/11 - Elevator and Rudder Hinge Fittings - Inspection and/or 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\n# AD/AC-112/11 Elevator and Rudder Hinge Fittings - Inspection\n\nand/or Replacement\n\nApplicability: All models 112 with S/Nos. 13003 and 3 to 544.\n\n \n\nAll models 112TC and 112TCA with S/Nos. 13001 to 13309.\n\n \n\nDocument: Rockwell International SL No. SL-112-46.\n\n# 3/80\n\n \n\nCompliance: Unless already accomplished, within 100 hours’ time in service after 31 March 1980.\n\n \n\nBackground: There is a possibility of elongation of holes in the hinge fittings and cracks in the rudder spar developing in service.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1841},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original, tightly focused scope. It addresses a specific structural safety defect in defined aircraft models and requires a single maintenance action, without expansion into broader operational or certification requirements."},"complexity_factors":["Narrow applicability limited to specific aircraft serial number ranges","Single compliance action with clear time limit (100 hours time in service)","Cross-reference to one external technical document (Rockwell Service Letter SL-112-46)","No conditional exceptions or nested definitions"],"plain_english_summary":"**What this directive requires**\n\nOwners and operators of specific Gulfstream (Rockwell) 112 series aircraft must inspect — and replace if necessary — the elevator and rudder hinge fittings on their planes.\n\n**Who must comply**\n\nThis applies only to specific serial numbers:\n*   **Model 112**: Serial numbers 13003, and 3 through 544\n*   **Models 112TC and 112TCA**: Serial numbers 13001 through 13309\n\n**The safety issue**\n\nThe directive addresses a risk of the bolt holes in hinge fittings becoming elongated (stretched out) and cracks developing in the rudder spar (the main structural beam of the rudder). These defects could weaken the aircraft's control surfaces and affect flight safety.\n\n**What must be done**\nUnless already completed, the inspection and any required replacement must be carried out within 100 hours of flight time after 31 March 1980. The work must follow the procedures set out in Rockwell International Service Letter No. SL-112-46."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement","history":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement/history","analysis":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement/analysis","conflicts":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement/conflicts","importantCases":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement/important-cases","documents":"/api/acts/ad-ac-112-11-elevator-and-rudder-hinge-fittings-inspection-and-or-replacement/documents"}}