{"id":"F2006B06705","name":"AD/S-76/22 - Main Rotor Control Servo Actuators - Inspection for Balance Tube Passage","slug":"ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114517,"registerId":"commonwealth-F2006B06705-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-76/22 - Main Rotor Control Servo Actuators - Inspection for Balance Tube Passage","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)  Sikorsky S-76 Series Helicopters\n\n \n\nAD/S-76/22 Main Rotor Control Servo Actuators - Inspection\n\nfor Balance Tube Passage\n\n\n6/82\n\n \n\nApplicability: All models.\n\n \n\nDocument: Sikorsky Alert SB 76-67-14A. NOTE: Helicopters previously inspected to SB 76-67- 14 are to be re-inspected.\n\n \n\nCompliance: Within 30 hours time in service after 28 April 1982.\n\n \n\nBackground: Restricted flight control motion was found to be due to the omission of a passage in the servo oil return 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\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":1297},"content_quality":"ok","complexity_score":2,"rejection_reason":"","scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope—a targeted safety inspection to identify a specific manufacturing defect (omitted balance tube passage) in servo actuators. There is no evidence of scope creep beyond the original aviation safety purpose."},"complexity_factors":["Single, specific mechanical inspection requirement","Narrow applicability limited to one aircraft series (Sikorsky S-76)","Simple compliance metric (30 hours time in service)","No interpretation section, defined terms, or nested exceptions","Only one external reference (manufacturer's service bulletin)"],"plain_english_summary":"This is a mandatory safety inspection order for all Sikorsky S-76 helicopters. It requires operators to check the **main rotor control servo actuators** (the hydraulic components that help pilots control the main rotor blades) for a missing oil passage called the \"balance tube passage.\"\n\n**Why this matters:** If this passage was accidentally left out during manufacturing, it restricts flight control movement. This could make the helicopter difficult or impossible to control, creating a serious crash risk.\n\n**What must be done:**\n- Inspect the servo actuators following Sikorsky Alert Service Bulletin 76-67-14A\n- Complete the inspection within 30 hours of flight time after 28 April 1982\n- **Important:** Even if the helicopter was already inspected under the earlier bulletin (SB 76-67-14), it must be re-inspected under this updated directive"}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage","history":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage/history","analysis":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage/analysis","conflicts":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage/conflicts","importantCases":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage/important-cases","documents":"/api/acts/ad-s-76-22-main-rotor-control-servo-actuators-inspection-for-balance-tube-passage/documents"}}