{"id":"F2006B02058","name":"AD/AA-5/25 - Elevator Drain Holes - Inspection and Modification","slug":"ad-aa-5-25-elevator-drain-holes-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41280,"registerId":"commonwealth-F2006B02058-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-5/25 - Elevator Drain Holes - Inspection and Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue NK,Aircraft below 5700 kg,Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes,Elevator Drain Holes - Inspection and Modification,25\ntitle: Airworthiness Directive - AD/AA-5/25 - Elevator Drain Holes - Inspection and Modification\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/ American Aviation) AA-5 Series Aeroplanes\n\n \n\nAD/AA-5/25 Elevator Drain Holes - Inspection and Modification NK\n\nApplicability: All models AA-5A and AA-5B with S/Nos. AA5A-0001 to AA5A-0896 and AA5B- 0001 to AA5B-1310.\n\n \n\nDocument: Gulfstream American SB No. 169.\n\n \n\nCompliance: Within 100 hours’ time in service after 30 June 1980.\n\n \n\nBackground: Overseas there have been reports of AA5 aircraft having water collecting in the trailing edge of the elevators.\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":1611},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: remedying a specific technical defect (water accumulation in elevator trailing edges) on defined aircraft models. There is no evidence of scope expansion beyond the initial safety remediation required to address the reported overseas incidents."},"complexity_factors":["Extremely brief document (under 150 words)","Narrow applicability restricted to two specific aircraft models with defined serial number ranges","Single, unconditional compliance requirement with no exceptions or alternative methods stated","No defined terms or cross-references to other legislative provisions beyond the enabling Civil Aviation Regulations"],"plain_english_summary":"**What this does:** This is a mandatory safety order (an Airworthiness Directive) requiring owners of specific light aircraft to fix a drainage problem in the tail section.\n\n**Who it affects:** Owners and operators of Gulfstream (Grumman American) AA-5A and AA-5B aeroplanes with serial numbers AA5A-0001 through AA5A-0896, and AA5B-0001 through AA5B-1310.\n\n**What you must do:** Inspect and modify the drain holes in the aircraft's elevators (the movable surfaces on the tail that make the plane go up and down). The technical instructions are contained in Gulfstream American Service Bulletin No. 169.\n\n**Why it matters:** Overseas reports showed water collecting inside the trailing edge of these elevators. Trapped water can freeze at altitude, add dangerous weight, or cause corrosion—any of which could impair control of the aircraft.\n\n**Deadline:** You must complete this work within 100 hours of flight time after 30 June 1980."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification","history":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification/history","analysis":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification/analysis","conflicts":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification/important-cases","documents":"/api/acts/ad-aa-5-25-elevator-drain-holes-inspection-and-modification/documents"}}