{"id":"F2006B02228","name":"AD/AIRCON/2 - Godfrey Cabin Supercharger Type 15 - Modification","slug":"ad-aircon-2-godfrey-cabin-supercharger-type-15-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41458,"registerId":"commonwealth-F2006B02228-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AIRCON/2 - Godfrey Cabin Supercharger Type 15 - 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,Equipment,Airconditioning Equipment,Godfrey Cabin Supercharger Type 15 - Modification,2\ntitle: Airworthiness Directive - AD/AIRCON/2 - Godfrey Cabin Supercharger Type 15 - Modification\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Airconditioning Equipment\n\n \n\nAD/AIRCON/2 Godfrey Cabin Supercharger NK\n\nType 15 - Modification\n\nApplicability: All Godfrey Cabin Superchargers Type 15.\n\n \n\nRequirement: Modify the attachment of the oil metering unit and the bearing cover plate to the cabin supercharger to provide a positive locking of the nuts to studs and studs to supercharger casing. Lockwiring of drilled studs and castellated nuts or the use of plain washers, spring washers and lockwired plain nuts are acceptable means of compliance.\n\n \n\nCompliance: Forthwith.\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":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific mechanical defect in a single aircraft component. It has not expanded beyond its original purpose of mandating a specific hardware modification."},"complexity_factors":["Single, specific piece of equipment targeted (Godfrey Cabin Supercharger Type 15)","No defined terms section","No cross-references to other legislation or regulations","Simple binary compliance options (two acceptable methods explicitly stated)","No conditional logic, exceptions, or nested provisions","Total length: approximately 100 words of substantive content","Immediate compliance with no phased implementation or alternative timelines"],"plain_english_summary":"This AD mandates an immediate modification to Godfrey Cabin Supercharger Type 15 units: the oil metering unit and bearing cover plate nuts/studs must be positively locked so they cannot loosen in flight. Compliance may be by lockwiring or by using plain and spring washers with lockwired plain nuts.\n\nIt applies to any operator with this supercharger installed and prevents loose fasteners that could cause loss of cabin pressure, ventilation failure, smoke, or fire."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies explicitly to all Godfrey Cabin Supercharger Type 15 units and mandates a specific mechanical modification. The text contains no indication that its scope departs from that stated applicability or from the stated requirement."},"complexity_factors":["Narrow applicability: Applies only to all Godfrey Cabin Supercharger Type 15 units (Applicability).","Specific technical action: Requires modification of oil metering unit and bearing cover plate attachments to provide positive locking (Requirement).","Prescribed acceptable methods: Lists lockwiring or washer+lockwire options as means of compliance, reducing interpretive uncertainty (Requirement).","Immediate compliance: 'Forthwith' deadline creates scheduling and operational pressure for affected operators (Compliance).","Operational burden: Requires mechanical shop time and qualified maintenance personnel; costs borne by owners/operators (Requirement; Compliance).","Low regulatory discretion: Directive is prescriptive rather than discretionary, limiting regulator/operator interpretation (Requirement; Compliance)."],"plain_english_summary":"This directive requires owners/operators of all Godfrey Cabin Supercharger Type 15 units to modify how the oil metering unit and the bearing cover plate are attached so nuts and studs are positively locked to the supercharger casing. Acceptable fixes named in the instrument are lockwiring drilled studs with castellated nuts or using plain/spring washers with lockwired plain nuts (Requirement). Compliance is immediate (“Forthwith”); the owner/operator pays for the mechanical work and must supply qualified maintenance to carry it out (Applicability; Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification","history":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification/history","analysis":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification/analysis","conflicts":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification/conflicts","importantCases":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification/important-cases","documents":"/api/acts/ad-aircon-2-godfrey-cabin-supercharger-type-15-modification/documents"}}