AD/G1159/11 - Flight Control Trim Systems - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, form a comprehensive framework governing all aspects of civil aviation in Australia. Among these regulations, Part 39 - 105 specifically addresses the Civil Aviation Safety Authority’s (CASA) schedule of airworthiness directives to ensure that aircraft maintain the highest safety standards. The legislative instrument F2006B10012, which focuses on the Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes, was introduced to address specific issues with the flight control trim systems. The instrument mandates inspections and modifications for these aircraft models to mitigate risks associated with identified safety concerns, ensuring compliance within 150 hours of service after 29 March 1974. This directive is aimed at maintaining operational safety and reliability of the aircraft, reflecting CASA’s commitment to safeguarding air travel.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the safety and operational standards within the Australian aviation sector. These regulations establish directives that govern the airworthiness of aircraft, ensuring that all aircraft operating within Australia must adhere to the stipulated safety standards. One such directive, AD/G1159/11, applies to Gulfstream (Grumman) G1159 and G-IV series aeroplanes with serial numbers (S/Nos.) within the ranges of 1 to 135 and 775. This directive mandates an inspection and modification of the flight control trim systems for these specific models, ensuring they meet the necessary safety standards to operate within Australian airspace. Compliance with this directive is required within 150 hours of time in service after 29 March 1974, as outlined in Grumman Aircraft Service Change No. 168. The scope of this legislation is narrowly focused on ensuring the specified models of Gulfstream aircraft are safe for operation within Australia, with no broader exemptions or exclusions mentioned in this particular directive.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, Part 39 - 105, specifically the Airworthiness Directive (AD) AD/G1159/11 concerning Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes, are found in the Schedule of Airworthiness Directives. This particular directive mandates inspection and modification of flight control trim systems on all G1159 and G-IV series aeroplanes with serial numbers (S/Nos.) ranging from 1 to 135 and 775. The directive is based on Grumman Aircraft Service Change No. 168 and requires compliance within 150 hours of time in service following the directive's issuance date of 29 March 1974. The primary obligation imposed by this directive is that all specified aircraft models must undergo a thorough inspection and, if necessary, modification of their flight control trim systems within the stipulated timeframe. This requirement is crucial to ensure that the aircraft maintain their airworthiness and comply with safety standards set by the Civil Aviation Safety Authority (CASA). Failure to comply with these requirements can result in severe consequences, as outlined in the regulations. The Civil Aviation Regulations 1998 impose strict penalties and consequences for non-compliance with airworthiness directives such as AD/G1159/11. Any breach of the compliance requirements can lead to enforcement actions, including fines and potential criminal charges. The maximum penalties can vary depending on the severity of the breach and whether it is classified as a civil or criminal offence. Civil penalties may include substantial fines, while criminal penalties can include imprisonment. Ensuring adherence to these directives is therefore not only a matter of operational compliance but also of legal necessity to avoid severe repercussions. In summary, the Civil Aviation Regulations 1998, specifically AD/G1159/11, mandate that Gulfstream G1159 and G-IV series aeroplanes with specified serial numbers must have their flight control trim systems inspected and modified within 150 hours of service after 29 March 1974. Non-compliance with these requirements can result in significant civil and criminal penalties, highlighting the importance of strict adherence to the directive for maintaining aircraft safety and regulatory compliance.