{"id":"F2006B10104","name":"AD/G164/19 - Fuel Shut Off Control Installation - Modification","slug":"ad-g164-19-fuel-shut-off-control-installation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55610,"registerId":"commonwealth-F2006B10104-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G164/19 - Fuel Shut Off Control Installation - 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)  Schweizer (Grumman) G-164 (Ag-Cat) Series Aeroplanes\n\n \n\nAD/G164/19 Fuel Shut Off Control Installation - Modification 6/82\n\nApplicability: All models G-164A with S/Nos. 1726A to 1730A, All models G-164B with S/Nos. 335B to 659B, All models G-164C with S/Nos. 1C to 44C, and All models G-164D with S/Nos. 1D to 22D.\n\nDocument: 1. Schweizer Aircraft Corp. AG-CAT SB No. 78; or 2. FAA AD 82-07-04.\n\nCompliance: Unless already accomplished, within 100 hours time in service after 30 June 1982.\n\n \n\nBackground: The manufacturer has determined that forceful operation of the fuel cock to the “On” position can result in over-rotation of the cock to an unplacarded “Off” position.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1757},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: correcting the fuel shut-off control defect in specific Schweizer G-164 aircraft. It has not expanded beyond this specific safety modification."},"complexity_factors":["Single compliance action with no exceptions, exemptions, or conditional logic","Limited applicability to specific aircraft models and narrow serial number ranges only","No definitions section, interpretation clauses, or cross-references to other legislation","Simple time-based compliance trigger (100 hours time-in-service after fixed date)"],"plain_english_summary":"**What this does:** This is a safety directive (Airworthiness Directive) requiring owners of specific Schweizer G-164 \"Ag-Cat\" agricultural aircraft to modify the fuel shut-off control installation.\n\n**Who it affects:** Owners and operators of specific Schweizer (Grumman) G-164A, G-164B, G-164C, and G-164D aircraft with specific serial numbers:\n- G-164A: serial numbers 1726A to 1730A\n- G-164B: serial numbers 335B to 659B  \n- G-164C: serial numbers 1C to 44C\n- G-164D: serial numbers 1D to 22D\n\n**Why it matters:** The manufacturer discovered that forcefully turning the fuel cock to the \"On\" position can cause it to rotate too far into an unmarked \"Off\" position. This could accidentally cut fuel to the engine during flight, causing engine failure.\n\n**What must be done:** Unless already completed, operators must carry out the modification specified in **Schweizer Service Bulletin No. 78** (or follow **FAA AD 82-07-04**) within **100 hours of flying time** after 30 June 1982."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification","history":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification/history","analysis":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification/analysis","conflicts":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification/conflicts","importantCases":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification/important-cases","documents":"/api/acts/ad-g164-19-fuel-shut-off-control-installation-modification/documents"}}