{"id":"F2006B10013","name":"AD/G1159/12 - Wing Rear Beam Lower Cap Splice Attachment Bolt - Inspection and Modification","slug":"ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55380,"registerId":"commonwealth-F2006B10013-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/12 - Wing Rear Beam Lower Cap Splice Attachment Bolt - 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) G1159 and G-IV Series Aeroplanes\n\n \n\n# AD/G1159/12 Wing Rear Beam Lower Cap Splice Attachment\n\nBolt - Inspection and Modification\n\nApplicability: All models with S/Nos. 1 to 140 and 775. Document:  Grumman Aircraft Service Change No. 163.\n\n# 3/74\n\nCompliance: Within 150 hours time in service after 29 March 1974 or before 1 September 1974 whichever occurs first.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1902},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope targeting a specific structural defect in identified aircraft serial numbers. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single technical requirement with narrow applicability","Conditional compliance deadline requiring calculation (flight hours vs calendar date)","Cross-reference to external technical manual for implementation details","Precise serial number limitations"],"plain_english_summary":"**What this is:** A mandatory safety order (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority that requires owners to inspect and modify critical wing attachment bolts on specific Gulfstream aircraft.\n\n**Who it affects:** Owners and operators of Gulfstream G1159 and G-IV series aeroplanes with serial numbers 1 through 140, and serial number 775.\n\n**What must be done:** You must inspect and modify the bolts that attach the wing rear beam lower cap splice, following the technical instructions in *Grumman Aircraft Service Change No. 163*.\n\n**Deadline:** Within 150 hours of flight time after 29 March 1974, or before 1 September 1974 — whichever happens first.\n\n**Why this matters:** This prevents potential structural failure of the wing attachment points, which could cause the wing to separate from the fuselage during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification","history":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification/history","analysis":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification/analysis","conflicts":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification/important-cases","documents":"/api/acts/ad-g1159-12-wing-rear-beam-lower-cap-splice-attachment-bolt-inspection-and-modification/documents"}}