{"id":"F2006B02285","name":"AD/AL 250/76 - Falcon Helicopters","slug":"ad-al-250-76-falcon-helicopters","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41515,"registerId":"commonwealth-F2006B02285-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 250/76 - Falcon Helicopters","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAllison Turbine Engines \\- 250 Series\n\nAD/AL 250/76 Falcon Helicopters 10/95 DM\n\nApplicability: All Allison Model 250 engines and modules maintained and/or released by Falcon Helicopters Incorporated, Lee’s Summit, Missouri USA, Federal Aviation Administration Repair Station SY2R178L.\n\nRequirement: 1. Remove from service any engine or module maintained and/or released by Falcon Helicopters Incorporated, Lee’s Summit, Missouri USA, Federal Aviation Administration Repair Station SY2R178L.\n\n2. Engines and/or modules removed from service in accordance with Requirement 1 of this Directive shall only be returned to service following the disassembly of the engine and/or modules as applicable and inspection of all engine parts maintained and/or released by Falcon Helicopters Incorporated for compliance with Allison Engine Company published data.\n\nCompliance: Effective 11 August 1995; within 10 hours’ time in service.\n\nBackground: This Directive has been issued to require certain Allison Model 250 engines and/or modules to be removed from service. The requirement follows the investigation of a Major Defect Report (MDR) concerning the failure of a turbine assembly 1.5 hours’ time service after overhaul by Falcon Helicopters Inc. A further 15 defect reports have been received since April 1995, all addressing defects in engines released by Falcon Helicopters Inc. In consideration of those reports, the airworthiness of Allison Model 250 engines and/or modules maintained and/or released by Falcon Helicopters Inc. is of concern.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2420},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standalone airworthiness directive establishing its original scope. It remains tightly focused on the specific safety defect concerning Allison 250 engines maintained by Falcon Helicopters Inc., with no evidence of scope creep beyond the initial safety investigation."},"complexity_factors":["Single, clearly defined applicability (specific engine model + specific repair station)","Direct command structure with no nested exceptions or conditional sub-clauses","No cross-references to other legislative provisions","Minimal defined terms (only standard aviation terminology like 'time in service')","Short, single-purpose instrument with straightforward compliance timeline"],"plain_english_summary":"This emergency Airworthiness Directive immediately grounds Allison Model 250 turbine engines (or modules) that were overhauled or released by Falcon Helicopters Inc. Operators must remove affected engines from service within 10 flight hours and they may not be returned to service until fully disassembled and inspected to verify compliance with the Allison Engine Company’s specifications.\n\nThe AD targets owners, operators and maintenance holders of Allison 250 engines after a post-overhaul failure and 15 additional defect reports, declaring the engines an unacceptable air-safety risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-250-76-falcon-helicopters","history":"/api/acts/ad-al-250-76-falcon-helicopters/history","analysis":"/api/acts/ad-al-250-76-falcon-helicopters/analysis","conflicts":"/api/acts/ad-al-250-76-falcon-helicopters/conflicts","importantCases":"/api/acts/ad-al-250-76-falcon-helicopters/important-cases","documents":"/api/acts/ad-al-250-76-falcon-helicopters/documents"}}