{"id":"F2006B10110","name":"AD/G164/5 Amdt 1 - Elevator Torque Tubes - Inspection","slug":"ad-g164-5-amdt-1-elevator-torque-tubes-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55628,"registerId":"commonwealth-F2006B10110-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G164/5 Amdt 1 - Elevator Torque Tubes - Inspection","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/G164/5\n\nAmdt 1\n\n\nElevator Torque Tubes - Inspection 5/66\n\n \n\nApplicability: All models G164 and G164A fitted with elevator S/Nos. 1 to 461.\n\n \n\nRequirement: Inspect the left and right hand elevator torque tubes for cracking adjacent to the inboard rib attachment welds, and also where the two 1/8\" diameter blind rivets attach the right hand elevator leading edge skin cover to the torque tube. Cracked tubes are to be repaired in accordance with Grumman Ag-Cat SB No. 33.\n\n \n\nCompliance: At intervals not exceeding 100 hours time 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\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":1853},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original directive's focused scope on elevator torque tube structural integrity for specific aircraft serial numbers. It does not expand applicability to additional aircraft models or systems beyond the original safety intent."},"complexity_factors":["Narrow applicability limited to specific serial number range (elevators S/Nos. 1 to 461)","External cross-reference to manufacturer service bulletin (Grumman Ag-Cat SB No. 33) for repair procedures","Precise dimensional specifications (1/8 inch diameter blind rivets)","Defined recurring compliance interval (100 hours time in service)"],"plain_english_summary":"This AD requires owners/operators of Schweizer (Grumman) G‑164 and G‑164A crop dusters (SNs 1–461) to have mechanics inspect left and right elevator torque tubes for cracks at the weld-to‑rib attachments and where the right elevator’s leading‑edge skin is riveted to the tube. Cracked tubes must be repaired per Manufacturer Service Bulletin No. 33. Inspections are mandatory at least every 100 flight hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection","history":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection/history","analysis":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection/analysis","conflicts":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection/conflicts","importantCases":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection/important-cases","documents":"/api/acts/ad-g164-5-amdt-1-elevator-torque-tubes-inspection/documents"}}