Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve as the principal legislative instrument governing civil aviation safety in the country. One of the specific legislative instruments within this overarching regulation is the Airworthiness Directive AD/TB10/2, which was introduced to address safety concerns related to the Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. This directive was issued by the Civil Aviation Safety Authority to rectify an identified issue with certain rivets in the horizontal stabilizer that were prone to loosening over time, potentially compromising the aircraft's structural integrity. The policy objective of this directive is to ensure that all affected aircraft undergo necessary inspections and modifications to mitigate safety risks, thereby maintaining high standards of aviation safety. The AD/TB10/2 mandates that inspections be conducted initially within 25 hours of service after 23 June 1981, followed by inspections at intervals not exceeding 100 hours until all specified rivets are replaced. Furthermore, the directive requires that the replacement of these rivets be completed within 300 hours of service after 23 June 1981. This proactive approach aims to preemptively address potential safety hazards by ensuring the timely and systematic replacement of problematic rivets, thereby upholding the safety standards set forth by the Civil Aviation Regulations.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 – 105, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes with serial numbers (s/Nos.) prior to 172. This legislation mandates rigorous inspection and modification requirements for the horizontal stabilizer rivets of the affected aircraft to ensure ongoing airworthiness. The scope of this directive is geographically and operationally comprehensive within the Commonwealth of Australia, ensuring that all operators of these aircraft adhere to the stipulated safety standards. This regulation extends to all relevant persons and entities involved in the operation, maintenance, and oversight of the specified aircraft models. There are no stated exclusions, exemptions, or thresholds within the text of this directive; however, further implementation details and specific conditions may be prescribed through subordinate instruments issued by the Civil Aviation Safety Authority. The directive requires initial inspections within 25 hours of time in service after 23 June 1981, followed by subsequent inspections at intervals not exceeding 100 hours of time in service until all specified rivets are replaced, and mandates modification by replacing the rivets in accordance with the referenced document within 300 hours of time in service after the same date.

Key Provisions

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, establish a schedule of airworthiness directives which are binding for certain types of aircraft. In this instance, AD/TB10/2 pertains to Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes, addressing critical safety concerns related to horizontal stabilizer rivets (sections 1 and 2). According to the regulation, all affected models, specifically those with serial numbers prior to 172, must undergo an initial inspection within 25 hours of time in service following 23 June 1981. This initial inspection is mandated to ensure that all relevant rivets have been examined for integrity. Subsequent inspections must be conducted at intervals not exceeding 100 hours time in service until all identified rivets are replaced, ensuring ongoing airworthiness and safety. The regulations impose several obligations on the operators and maintainers of the TB9 and TB10 series aeroplanes. They are required to perform the initial inspection within the specified timeframe and to ensure that all rivets referenced in Service Bulletin No. 8 are identified and subsequently replaced. The replacement of these rivets must be completed within 300 hours of time in service after 23 June 1981. Failure to adhere to these inspection and modification requirements could compromise the structural integrity of the aircraft, leading to safety hazards. In terms of compliance, operators and maintainers must ensure that all inspections and modifications are documented and carried out by qualified personnel. The compliance with these directives is essential to maintain the airworthiness certificate of the aircraft and to ensure the safety of all persons on board. Non-compliance with these directives could result in significant penalties. Under the Civil Aviation Act 1988, breaches of airworthiness directives can lead to severe consequences, including fines and imprisonment. The maximum penalties for contravening these regulations can include substantial fines for corporations and imprisonment for individuals responsible for the oversight of the aircraft maintenance, reinforcing the importance of strict adherence to these safety directives.