{"id":"F2006B10161","name":"AD/GAF-N22/15 - Engine Air Intake Fairing - Inspection and Rework","slug":"ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55768,"registerId":"commonwealth-F2006B10161-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/15 - Engine Air Intake Fairing - Inspection and Rework","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)  GAF N22 and N24 Series Aeroplanes\n\n \n\nAD/GAF-N22/15 Engine Air Intake Fairing - Inspection\n\nand Rework Applicability: All models N22 and N22B not incorporating GAF Mod. N226. Document:               GAF Alert SB No. N22.71.2.\n\nCompliance: Within 100 hours time in service after 30 September 1977.\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\n \n\n\n9/77\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive from 1977. It has not expanded beyond its original narrow purpose of addressing a specific airworthiness concern with the engine air intake fairing on specific GAF aircraft models."},"complexity_factors":["Extremely short document (approximately 150 words)","Single, clearly defined applicability clause with one explicit exemption","Single compliance requirement with straightforward time limit (100 hours time in service)","No defined terms section — uses plain aviation terminology","No cross-references to other legislation or complex conditional logic","References only one external technical document (the Service Bulletin)","No nested exceptions or layered requirements"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:**\nOrders owners and operators of specific GAF aircraft (the N22 and N22B models) to inspect and repair the **engine air intake fairing** — the housing around where the engine breathes in air. This is critical because damage or defects here can affect engine performance or cause failure.\n\n**Who it affects:**\n- Owners and operators of **GAF N22 and N22B aeroplanes** (small utility aircraft originally built by the Government Aircraft Factories)\n- **Exclusion:** Aircraft that already have a specific factory modification installed (GAF Mod. N226) are exempt\n\n**What must be done:**\n- Follow the instructions in **GAF Alert Service Bulletin No. N22.71.2** (the technical manual for this repair)\n- Complete the inspection and any necessary rework **within 100 hours of flying time** after 30 September 1977\n\n**Why it matters:**\nAirworthiness Directives are legally binding. Ignoring this order means the aircraft cannot be considered airworthy (safe to fly). This particular AD addresses a specific safety concern about the engine intake structure that, if unaddressed, could lead to engine problems in flight."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provides a narrowly scoped directive applying to GAF N22 and N22B aircraft that have not incorporated Mod. N226, requiring inspection and rework per GAF Alert SB No. N22.71.2 within a defined 100-hour window after 30 September 1977. The instrument's text contains no information indicating a change from an earlier or original scope; therefore there is no evidence in this document that the scope has been changed."},"complexity_factors":["Narrow, well-defined applicability (specific models and a clear exemption for Mod. N226)","Single prescribed action (inspection and rework) tied to an external technical document (GAF Alert SB No. N22.71.2)","Short, explicit compliance window (100 hours time in service after 30 September 1977) requiring accurate time-in-service tracking","Operational dependencies (availability of maintenance resources, parts, or specialist skills) implicit in the referenced service bulletin","Limited regulatory discretion in the text—mostly prescriptive—so complexity arises from practical implementation rather than interpretive legal uncertainty"],"plain_english_summary":"This airworthiness directive requires owners/operators of GAF N22 and N22B aircraft that have not incorporated GAF Mod. N226 to inspect and, if necessary, rework the engine air‑intake fairing in accordance with GAF Alert SB No. N22.71.2, to be completed within 100 hours time‑in‑service after 30 September 1977.\n\nIt affects those operators’ maintenance planning and costs and is enforceable under the Civil Aviation Regulations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework","history":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework/history","analysis":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework/analysis","conflicts":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework/conflicts","importantCases":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework/important-cases","documents":"/api/acts/ad-gaf-n22-15-engine-air-intake-fairing-inspection-and-rework/documents"}}