AD/AA-5/22 - Aileron Torque Tube - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, issued by the Civil Aviation Safety Authority, addresses safety concerns within the aviation industry by mandating Airworthiness Directives (ADs) to ensure the safe operation of aircraft. One such AD, AD/AA-5/22, pertains to the inspection and modification of aileron torque tubes on Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes. This legislation was introduced to mitigate the risk associated with potentially incorrectly assembled aileron torque tube joints, as highlighted by the manufacturer, to ensure the continued airworthiness and safety of these aircraft models. The policy objective is to enforce stringent safety measures and compliance timelines to protect against potential flight safety hazards. Enacted by the Parliament of the Commonwealth of Australia, the regulations mandate that all affected aircraft models, specifically AA5A with serial numbers ranging from -0176 to -0805, and AA5B with serial numbers ranging from -0303 to -1078, as well as those fitted with replacement ailerons P/N 5202035-505 shipped between May 1976 and January 1979, undergo inspection and necessary modifications within 25 hours of time in service after 4 July 1979. This directive is supported by Gulfstream American Service Bulletin No. 163, underscoring the commitment to maintaining high safety standards in civil aviation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the safety directives for certain aircraft, including the Gulfstream (Grumman American/ American Aviation) AA-5 Series aeroplanes, as detailed in the Airworthiness Directive AD/AA-5/22. This regulation applies to all AA5A models with serial numbers ranging from -0176 to -0805, and all AA5B models with serial numbers from -0303 to -1078, as well as those fitted with replacement ailerons part number 5202035-505, which were shipped from the factory between May 1976 and January 1979. This directive mandates that the specified inspection and modification of the aileron torque tube must be completed within 25 hours of time in service following the directive’s issuance on 4 July 1979. The directive is supported by Gulfstream American Service Bulletin No. 163 and is subject to enforcement by the Civil Aviation Safety Authority, ensuring compliance across all Commonwealth jurisdictions. The scope of this regulation is confined to the specified models and serial numbers, and no exclusions or exemptions are stated within the text.

Key Provisions

The primary sections of the Civil Aviation Regulations 1998 (CARs) concerning the Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes and the Airworthiness Directive AD/AA-5/22, specifically address the inspection and modification of the aileron torque tube. Section 39-105 of the CARs specifies the applicability of this directive to all models AA5A with serial numbers (S/Nos.) ranging from -0176 to -0805, and all models AA5B with S/Nos. ranging from -0303 to -1078. Additionally, it includes all models fitted with replacement ailerons part number (P/N) 5202035-505 shipped from the factory between May 1976 and January 1979. The directive references Gulfstream American Service Bulletin No. 163 as the document outlining the required compliance measures. Compliance with these directives is mandated within 25 hours of the aeroplane's time in service after 4 July 1979. The CARs impose several obligations on the parties governed by this directive. Owners and operators of the affected aircraft must ensure that the aileron torque tube joints are inspected and, if necessary, modified in accordance with the instructions provided in Gulfstream American Service Bulletin No. 163. This involves a thorough examination to verify the correct assembly of the torque tube joints, with any discrepancies requiring appropriate corrective actions. Furthermore, all modifications and inspections must be completed by qualified personnel and documented appropriately to demonstrate compliance with the AD. The aim is to ensure the airworthiness of the aircraft by mitigating potential safety risks associated with improperly assembled aileron torque tubes. Failure to comply with the requirements set out in the AD/AA-5/22 may result in serious safety implications and legal consequences. Under the CARs, non-compliance with an airworthiness directive is an offence. The penalties for such breaches can include substantial fines and, in severe cases, imprisonment. The specific maximum penalties are not detailed in the provided extract, but they are typically outlined in the broader regulatory framework and can vary based on the severity of the breach and the impact on aviation safety. Additionally, non-compliance may lead to the grounding of the aircraft until the necessary inspections and modifications are completed, which can have significant operational and financial implications for the operators. The consequences of non-compliance extend beyond financial penalties and legal ramifications. Failure to adhere to airworthiness directives can compromise the safety of the aircraft, leading to potential accidents and loss of life. The Civil Aviation Safety Authority (CASA) closely monitors compliance with airworthiness directives and can take enforcement actions against operators who fail to meet the regulatory standards. This may include administrative actions, such as issuing compliance orders, as well as more severe measures, such as the suspension or revocation of airworthiness certificates. Therefore, it is imperative for operators to take the requirements of the AD/AA-5/22 seriously and ensure prompt and thorough compliance to maintain the highest safety standards in aviation operations.