{"id":"F2006B10152","name":"AD/GA-7/8 - Rudder Bellcrank - Inspection and Modification","slug":"ad-ga-7-8-rudder-bellcrank-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55735,"registerId":"commonwealth-F2006B10152-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GA-7/8 - Rudder Bellcrank - Inspection and 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)  Gulfstream (Grumman American) GA-7 Series Aeroplanes\n\n \n\nAD/GA-7/8 Rudder Bellcrank - Inspection and Modification NK\n\nApplicability: All models GA-7 with S/Nos. GA7-0002 to GA7-0093, GA7- 0096 to GA7-0099, and any model GA-7 which may have been fitted with rudder bellcrank assembly P/N 7CS10534-3 shipped from Grumman American Savannah, Georgia facility prior to 12 April 1979.\n\n \n\nDocument: Grumman American SB No. ME-19.\n\n \n\nCompliance: 1. Inspect within 25 hours time in service after 4 July 1979.\n\n \n\n2. Modify within 100 hours time in service after 4 July 1979.\n\n \n\nBackground: The rudder bellcrank may crack due to loads induced by wind gusts while aeroplane is parked.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive sets a specific, limited scope: it applies to GA-7 aeroplanes with listed serial numbers or those fitted with the specified bellcrank assembly shipped before 12 April 1979 (Applicability). It prescribes fixed inspection and modification deadlines and refers to a single Service Bulletin for technical steps (Compliance 1–2; Document). Nothing in the provided text indicates an expansion or contraction of scope from the instrument’s own stated applicability and requirements."},"complexity_factors":["Clear, narrowly drawn applicability by serial number and by a specific part number (Applicability).","Short, fixed time-in-service compliance windows for inspection (25 hours) and modification (100 hours) after a specified date (Compliance 1–2).","Reference to an external technical document (Grumman American SB No. ME-19) for procedures, requiring operators to obtain and follow that Bulletin (Document).","Absence of detail in the directive about who must perform the work or who bears costs increases practical implementation steps even though legal requirements are simple (Document; Compliance 1–2).","Safety rationale is narrow and specific (risk of cracking from wind gusts while parked) rather than broad, reducing interpretive complexity but raising practical questions about parts availability and workmanship (Background)."],"plain_english_summary":"This airworthiness directive requires owners/operators of certain Gulfstream (Grumman American) GA-7 aeroplanes — those with the rudder bellcrank PN 7CS10534-3 shipped from Savannah before 12 Apr 1979 — to inspect and modify that bellcrank within short, specified time limits, using Grumman American Service Bulletin procedures.  \n\nIt addresses a cracking risk from wind gusts while parked; operators bear the compliance burden, potential maintenance costs and downtime, and the directive does not specify funding, who must perform the work, or alternative compliance routes."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating inspection and modification of a known faulty component."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 3 defined elements: applicability criteria, compliance deadlines, and document reference","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Simple conditional logic: if your aircraft matches the serial numbers or part history, you must comply","Clear, unambiguous deadlines (25 hours and 100 hours time in service after a fixed date)","Single technical reference to manufacturer service bulletin rather than detailed procedural instructions embedded in the directive"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:**\nIt requires owners and operators of specific Gulfstream (formerly Grumman American) GA-7 series aeroplanes to **inspect and modify a part called the \"rudder bellcrank\"** — a mechanical component that helps control the rudder (the vertical tail surface that steers the plane left and right).\n\n**Who it affects:**\n- All GA-7 model aeroplanes with serial numbers GA7-0002 through GA7-0093, and GA7-0096 through GA7-0099\n- Any GA-7 that might have been fitted with a specific rudder bellcrank part (P/N 7CS10534-3) shipped from the manufacturer's Savannah, Georgia factory before 12 April 1979\n\n**Why it matters:**\nThe rudder bellcrank can **crack due to wind gusts** hitting the plane while it's parked on the ground. If this part fails in flight, the pilot could lose control of the rudder, creating a serious safety risk.\n\n**What must be done:**\n1. **Inspection:** Check the rudder bellcrank within 25 flight hours after 4 July 1979\n2. **Modification:** Fix or replace the part within 100 flight hours after 4 July 1979\n\nThe directive references a manufacturer service bulletin (SB No. ME-19) that contains the detailed technical instructions for the inspection and modification."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification","history":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification/history","analysis":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification/important-cases","documents":"/api/acts/ad-ga-7-8-rudder-bellcrank-inspection-and-modification/documents"}}