{"id":"F2006B10223","name":"AD/GAF-N22/73 - Rudder Pedals Brake Push Rod","slug":"ad-gaf-n22-73-rudder-pedals-brake-push-rod","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55881,"registerId":"commonwealth-F2006B10223-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/73 - Rudder Pedals Brake Push Rod","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-N22/73 Rudder Pedals Brake Push Rod 8/95\n\nApplicability: All models N22 and N24.\n\nRequirement: Action in accordance with ASTA Nomad SB NMD-27-47 Revision 1. Compliance:  At the next inspection for Maintenance Release issue after 20 July 1995, or prior to\n\n31 October 1995, whichever occurs first.\n\n \n\nBackground: There has been a reported failure of the brake push rod end fitting. Investigation revealed that excessive depth of the lightening hole in the end fitting caused the rod fitting to fail.\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD does not expand scope beyond the instrument's stated purpose. It applies only to GAF Nomad models N22 and N24 and requires the actions specified in ASTA Nomad SB NMD-27-47 Revision 1, to be completed by the next Maintenance Release inspection after 20 July 1995 or by 31 October 1995 (Applicability; Requirement; Compliance). There is no indication in the text that the AD changes the class of affected aircraft, the types of work required, or the regulatory basis beyond those stated details."},"complexity_factors":["Narrow applicability limited to 'All models N22 and N24' (Applicability).","Single technical corrective action mandated by an external document: 'ASTA Nomad SB NMD-27-47 Revision 1' (Requirement).","Fixed, short compliance window tied to maintenance-release timing or an absolute date (Compliance).","Requires technical inspection and possible repair/replacement of a structural component (Requirement; Background).","Regulatory force: issued as an airworthiness directive under the Civil Aviation Regulations Part 39 (header) — limited operator discretion on whether to comply."],"plain_english_summary":"What this instrument changes mechanically\n\n- It requires owners/operators of GAF Nomad aeroplanes of models N22 and N24 to carry out the actions set out in ASTA Nomad Service Bulletin NMD-27-47 Revision 1. (Requirement)\n- The mandated action is to be completed at the next inspection at which a Maintenance Release is issued after 20 July 1995, or, if that does not occur, no later than 31 October 1995 — whichever comes first. (Compliance)\n\nWho is affected\n\n- All operators and owners of GAF Nomad N22 and N24 aircraft. (Applicability)\n\nWhy it matters (official rationale, stated in the instrument)\n\n- The AD follows a reported failure of a brake push rod end fitting. The investigation cited excessive depth of a lightening hole in the end fitting as the cause of the failure. The AD directs inspections and corrective action per the referenced service bulletin to address that defect. (Background; Requirement)\n\nHow it works in practice — incentives, costs and decision points\n\n- Who pays: aircraft owners/operators bear the direct costs of the inspection and any corrective action required by the service bulletin. (Requirement)\n- Who decides: the Civil Aviation Safety Authority issued the AD under Part 39 (header). Operators decide when to schedule inspections and repairs within the AD’s timing window so as to obtain the next Maintenance Release or meet the absolute deadline. (header; Compliance)\n- Compliance burden: operators must perform the inspection and any remedial work specified in ASTA Nomad SB NMD-27-47 Revision 1. That may involve technician time, downtime for the aircraft while inspected/repaired, and any replacement parts or machining called for by the service bulletin. (Requirement)\n- Enforcement and discretion: the AD imposes a mandatory requirement with a fixed deadline tied to maintenance-release inspections; operators have limited discretion on timing only within the AD’s specified window. Inspectors and maintenance providers retain discretion over findings and the specific corrective actions called for by the SB, subject to the SB’s instructions. (Requirement; Compliance)\n\nTrade-offs, risks and operational effects\n\n- Trade-offs and opportunity cost: compliance requires diverting maintenance capacity and aircraft availability to carry out the inspection/repairs within the prescribed timeframe (Compliance). The cost of inspection/repair is borne now to reduce the risk of in-service failure later (Background).\n- Implementation risk: the AD relies on the service bulletin as the technical method for detection and correction (Requirement). The effectiveness of the AD therefore depends on the adequacy of that SB and on correct execution by maintenance personnel.\n\nNarrow scope and practical effect\n\n- The AD is narrowly targeted: it applies only to N22 and N24 Nomad models and to a single identified component (brake push rod end fitting), and it prescribes actions set out in a specific service bulletin with a short compliance window. (Applicability; Requirement; Compliance)\n\nSource citations: Applicability; Requirement; Compliance; Background."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating inspection/repair of the brake push rod end fitting."},"complexity_factors":["Single, specific mechanical component addressed (rudder pedal brake push rod)","Clear applicability statement (all N22 and N24 models)","Single compliance pathway with straightforward deadline logic","No defined terms section or interpretation provisions","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Background explanation provided in plain language","Total length: approximately 150 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to all **GAF N22 and N24 Nomad aircraft** (twin-turboprop planes originally built in Australia).\n\n**What it does:**\n- Requires owners/operators to inspect and fix a specific safety problem with the **rudder pedal brake push rod** — a component that connects your foot pedals to the brakes.\n- The problem: The end fitting of this rod has a \"lightening hole\" (a hole drilled to reduce weight) that was made too deep in some parts, causing the fitting to crack and fail.\n\n**Who must act:**\n- Anyone who owns, operates, or maintains a GAF N22 or N24 aircraft.\n\n**What they must do:**\n- Follow the repair instructions in **Service Bulletin NMD-27-47 Revision 1** (issued by ASTA, the aircraft manufacturer).\n- Complete this work either at the next scheduled inspection for issuing a Maintenance Release (think of this as an aircraft roadworthy certificate), **or** before 31 October 1995 — whichever comes first.\n\n**Why it matters:**\nBrake failure during taxi, takeoff, or landing could cause runway overruns or loss of control. This AD prevents that by catching defective parts before they fail."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod","history":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod/history","analysis":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod/analysis","conflicts":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod/conflicts","importantCases":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod/important-cases","documents":"/api/acts/ad-gaf-n22-73-rudder-pedals-brake-push-rod/documents"}}