{"id":"F2006B10177","name":"AD/GAF-N22/30 - Horizontal Stabiliser Control System - Inspection for Wind Gust Damage","slug":"ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55821,"registerId":"commonwealth-F2006B10177-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/30 - Horizontal Stabiliser Control System - Inspection for Wind Gust Damage","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\n# AD/GAF-N22/30  Horizontal Stabiliser Control System - Inspection for Wind Gust Damage\n\nApplicability: All models N22 and N24.\n\n# 12/79\n\n \n\nRequirement: 1. Inspect the horizontal stabiliser control stops and stop support structure for damage which may have been caused by wind gusts.\n\n \n\n2. If damage is found proceed with the inspection requirements of GAF Alert SB No. ANMD-27-12.\n\n \n\nCompliance: Unless already accomplished, before further flight.\n\n \n\nBackground: Wind gusts have caused damage to the lower fork end fitting of the stabiliser operating rod on several aeroplanes.\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument applies to all N22 and N24 models and requires a targeted inspection with prescribed follow-up if damage is found. The text does not indicate any expansion or contraction of scope relative to what it prescribes: it remains a focused airworthiness directive limited to inspection and referral to GAF Alert SB No. ANMD-27-12 (Applicability; Requirement 1–2)."},"complexity_factors":["Narrow applicability (only GAF N22 and N24 models) reduces breadth of impact (Applicability).","Single, immediate action required (one inspection) with a clear timeline (before further flight) lowers procedural complexity (Requirement 1; Compliance).","Reliance on an external manufacturer service bulletin (GAF Alert SB No. ANMD-27-12) for detailed follow-up introduces a dependency on another document for technical steps (Requirement 2).","Judgement required to determine whether an item is “damaged” creates some interpretive ambiguity and discretion for maintenance personnel (Requirement 1).","Operational disruption risk (aircraft downtime) and potential parts/repair lead times create practical complexity for operators even though the directive itself is short (Compliance; Requirement 2)."],"plain_english_summary":"This directive requires operators of all GAF N22 and N24 aeroplanes to inspect the horizontal stabiliser control stops and their support structure for wind‑gust damage and, if damage is found, to carry out the follow‑up inspections set out in GAF Alert Service Bulletin No. ANMD‑27‑12. The inspection must be completed before further flight, imposing short‑term inspection, repair costs and potential downtime on aircraft owners/operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical vulnerability in a specific aircraft type. It has not expanded beyond its original purpose of mandating inspections for wind gust damage to the horizontal stabiliser control system."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 substantive requirements plus compliance deadline","No defined terms section","Single cross-reference to external manufacturer document (GAF Alert SB No. ANMD-27-12)","No conditional logic or nested exceptions","Clear, imperative language ('inspect', 'if damage is found', 'before further flight')"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt requires owners and operators of specific Australian-made aircraft (the **GAF N22 and N24 series**, also known as the Nomad) to urgently inspect a particular part of the tail section — the horizontal stabiliser control system. Specifically, they must check the \"stops\" (mechanical limits that prevent the tail from moving too far) and their support structure for damage caused by **wind gusts**.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains GAF N22 or N24 aircraft. These were twin-turboprop aircraft built by the Government Aircraft Factories (GAF) in Australia, primarily used for regional transport, surveillance, and military purposes.\n\n**Why it matters:**\nWind gusts had already damaged the \"lower fork end fitting\" (a critical connection point in the tail control mechanism) on several planes. If this part fails, the pilot could lose control of the aircraft's pitch (up/down movement), potentially causing a crash. The directive is urgent: inspections must happen **before the next flight** unless already done.\n\n**What happens if damage is found:**\nOperators must follow additional inspection steps outlined in a manufacturer bulletin (GAF Alert Service Bulletin ANMD-27-12)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage","history":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage/history","analysis":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage/analysis","conflicts":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage/conflicts","importantCases":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage/important-cases","documents":"/api/acts/ad-gaf-n22-30-horizontal-stabiliser-control-system-inspection-for-wind-gust-damage/documents"}}