{"id":"F2006B02045","name":"AD/AA-5/13 - Upper Cowl Centre Hinge - Inspection and Replacement","slug":"ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41267,"registerId":"commonwealth-F2006B02045-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-5/13 - Upper Cowl Centre Hinge - Inspection and Replacement","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,Upper Cowl Centre Hinge - Inspection and Replacement,13\ntitle: Airworthiness Directive - AD/AA-5/13 - Upper Cowl Centre Hinge - Inspection and Replacement\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-5/13 Upper Cowl Centre Hinge - Inspection NK\n\nand Replacement\n\n \n\nApplicability: All models: AA5 with S/Nos. AA5-0641 to AA5-0834; AA5A with S/Nos. AA5A- 0001 to AA5A-0050, AA5A-0054 to AA5A-0056; AA5B with S/Nos. AA5B-0001 to AA5B-0169, AA5B-0171 and AA5B-0180 to AA5B-0183.\n\n \n\nDocument: 1. Grumman American SB No. 152; OR 2. FAA AD 76-01-02.\n\nCompliance: Inspect within 100 hours’ time in service after 16 April 1976 and thereafter at intervals not exceeding 100 hours’ time in service until replaced.\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 AD retains a targeted scope: it applies only to the listed AA‑5, AA‑5A and AA‑5B serial numbers and prescribes inspection intervals until replacement. It does not broaden applicability beyond those aircraft or change the core mechanical requirement from the documents it references."},"complexity_factors":["Narrow applicability limited to specific models and serial number ranges (precision in scope but requires accurate fleet records).","Mandated recurring inspections at short, fixed flight‑hour intervals (administrative and operational scheduling burden).","External-document dependence: corrective procedures are in Grumman SB No.152 or FAA AD 76‑01‑02 (requires access to and reliance on those documents).","Title mentions replacement but the compliance paragraph specifies inspection intervals 'until replaced' without procedure detail in the AD text itself (implementation relies on referenced documents).","Enforcement and compliance tracking rest with operator recordkeeping and regulator oversight (monitoring burden)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Gulfstream (Grumman American/American Aviation) AA‑5 series aeroplanes (listed serial numbers) to inspect the upper cowl centre hinge within 100 hours’ time‑in‑service after 16 April 1976 and then at intervals not exceeding 100 hours until the hinge is replaced. The AD refers to Grumman Service Bulletin No.152 or FAA AD 76‑01‑02 for the corrective action. Owners pay for inspections and any replacement; the rule forces recurring checks and eventual replacement to detect and remove a potentially defective hinge."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD remains tightly scoped to its original purpose: addressing a specific mechanical defect in a defined population of aircraft. The serial number limitations and model-specific applicability demonstrate precise targeting without scope creep."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 3 defined applicability criteria (specific serial number ranges for three aircraft models)","Single compliance action with clear time trigger (100 hours time-in-service)","No nested exceptions or conditional logic — straightforward 'inspect until replaced' requirement","Only 2 reference documents cited","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998"],"plain_english_summary":"This CASA Airworthiness Directive mandates recurring inspections of the upper cowl centre hinge on Gulfstream (formerly Grumman American) AA-5, AA-5A and AA-5B aeroplanes of specified serials, until the hinge is replaced. It affects owners/operators of these light aircraft because a hinge failure could let the engine cowling detach or interfere with flight. Work may follow Grumman Service Bulletin No.152 or FAA AD 76-01-02."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement","history":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement/history","analysis":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement/important-cases","documents":"/api/acts/ad-aa-5-13-upper-cowl-centre-hinge-inspection-and-replacement/documents"}}