AD/AC-112/12 - Rudder Rib - Inspection

Overview

The Civil Aviation Regulations 1998, as amended, were enacted to provide a comprehensive framework for the regulation of civil aviation in Australia, ensuring safety and efficiency in the sector. One aspect of this regulation is encapsulated in Part 39 - 105, which addresses the issuance of Airworthiness Directives to ensure that aircraft remain in a safe condition for operation. This part was introduced to address specific safety concerns and ensure compliance with airworthiness standards. The Civil Aviation Safety Authority, under the authority of the Australian Parliament, enacts these regulations to protect public safety by mandating specific safety directives for certain aircraft models, such as the Gulfstream (Rockwell) 112 Series Aeroplanes, as detailed in the schedule of airworthiness directives. The policy objective is to mitigate risks associated with identified safety issues, such as structural cracks, by requiring regular inspections and maintenance actions. The specific legislative instrument F2006B02182 pertains to the Gulfstream (Rockwell) 112 Series Aeroplanes, focusing on the inspection of rudder rib components. This directive was introduced in response to service reports of cracks in the rudder tip rib at balance weight attachment holes. The Civil Aviation Safety Authority mandates that inspections be carried out unless already completed within the last 100 hours of time in service, with subsequent inspections required at intervals not exceeding 100 hours’ time in service until further maintenance is completed. This regulation aims to ensure the continued airworthiness of the affected aircraft models and maintain high safety standards in the Australian civil aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all relevant stakeholders within the aviation industry, including aircraft manufacturers, operators, and maintenance providers, to ensure compliance with safety standards. This particular legislative instrument, AD/AC-112/12, concerns the inspection of rudder ribs on Gulfstream (Rockwell) 112 Series aeroplanes, specifically targeting the 112 and 112B models with serial numbers 3 to 544 and 13000, as well as the 112TC and 112TCA models with serial numbers 13001 to 13309. The requirement is for these aircraft to undergo inspections as detailed in Gulfstream American Service Bulletin No. SB-112-68, ensuring that such inspections are carried out unless they have already been completed within the last 100 hours of time in service, with subsequent inspections required at intervals not exceeding 100 hours’ time in service until the completion of Part II of the inspection. This regulation is a response to in-service reports of cracks in the rudder tip rib at the balance weight attachment hole, highlighting the importance of maintaining the structural integrity of the aircraft. The geographical and jurisdictional reach of this legislation is national, applying across all states and territories within the Commonwealth of Australia. It does not specify exclusions or exemptions beyond the already mentioned conditions for inspection intervals. The applicability of this directive may be further extended or modified through subordinate instruments issued under the authority of the Civil Aviation Safety Regulations, thereby ensuring that safety measures are consistently updated in response to new findings or technological advancements.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contains the Schedule of Airworthiness Directives, including AD/AC-112/12 concerning the inspection of rudder rib for Gulfstream (Rockwell) 112 Series Aeroplanes (Section 105). This directive applies to Models 112 and 112B with serial numbers (S/Nos.) 3 to 544 and 13000, as well as Models 112TC and 112TCA with S/Nos. 13001 to 13309. The directive references Gulfstream American Service Bulletin No. SB-112-68, which outlines the inspection procedures. The inspection must be carried out in accordance with Part I unless it has already been completed within the last 100 hours of time in service. After this initial inspection, subsequent inspections must occur at intervals not exceeding 100 hours of time in service until Part II of the inspection is completed (Section 3). The obligations imposed by this Airworthiness Directive on the parties governed by it include conducting a thorough inspection of the rudder rib at specified intervals. The inspections must be carried out in line with the guidelines provided in Gulfstream American Service Bulletin No. SB-112-68. Specifically, if the aircraft has not been inspected within the last 100 hours of time in service, an inspection must be performed before any further flight. Subsequent inspections must be conducted at intervals not exceeding 100 hours of time in service until the specified inspection requirements are fully met (Section 3). These obligations are designed to ensure the safety and airworthiness of the affected aircraft by addressing potential structural issues. Failure to comply with the Airworthiness Directive can result in serious consequences. While the specific civil or criminal penalties are not detailed in the provided text, non-compliance with airworthiness directives can lead to significant regulatory action under the Civil Aviation Act 1988. This may include fines, enforcement actions, and potentially grounding the aircraft if it is found to be unsafe. The severity of penalties may vary depending on the specific circumstances and the degree of non-compliance. It is imperative that all relevant parties adhere to the directives to avoid such adverse outcomes (Section 105).