AD/TB20/31 - Main Landing Gear

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, was enacted to ensure the safety and regulation of civil aviation within Australia. This legislative instrument addresses the specific problem of ensuring that maintenance procedures on aircraft, particularly the Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, are conducted according to stringent safety standards. The Airworthiness Directives are issued by the Civil Aviation Safety Authority (CASA) and aim to mitigate safety risks by mandating compliance with particular service bulletins and directives. The AD/TB20/31 focuses on the main landing gear of TB20 and TB21 aircraft, requiring that the rings on the attachment bearing of the landing gear are correctly installed following specified maintenance procedures, as outlined in Socata TB Service Bulletin SB10.091.57. This directive is critical in maintaining the structural integrity and operational safety of these aircraft. The enactment of these regulations by the Commonwealth of Australia through CASA is intended to ensure that all civil aviation operations adhere to safety standards that prevent accidents and enhance the reliability of aircraft. This legislative framework is essential for the continuous oversight and improvement of aviation safety, reflecting a commitment to protecting both the public and the aviation industry. By mandating adherence to specific maintenance procedures, the regulations help maintain a high standard of safety across the nation's airspace.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, including the AD/TB20/31 directive concerning the Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes. This legislation applies to TB20 and TB21 aircraft that have undergone maintenance involving the removal and replacement of the ring on the attachment bearing of the left-hand (LH) or right-hand (RH) main landing gear. The directive mandates that these aircraft must adhere to the requirements outlined in Socata TB Service Bulletin SB10.091.57 and references DGAC AD 95-08-4(A). The compliance deadline is set for 50 hours of time in service after 31 May 1995 or before 31 July 1995, whichever is earlier. The purpose of this directive is to ensure that the rings are correctly installed on the attachment bearing of the hinged strut to maintain airworthiness standards. This regulatory measure has a national jurisdictional reach within Australia, extending to all operators and maintenance personnel handling these aircraft.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include a schedule of airworthiness directives concerning the Aerospatiale (Socata) TB20 (Trinidad) series aeroplanes. One of these directives, AD/TB20/31, pertains to the main landing gear of TB20 and TB21 aircraft. According to section 1, this directive applies to aircraft where the ring on the attachment bearing of the left-hand (LH) or right-hand (RH) main landing gear has been removed and subsequently replaced during maintenance. The directive mandates that the action be taken in accordance with Socata TB Service Bulletin SB10.091.57, with a reference to DGAC AD 95-084(A). For the entities and parties governed by this directive, there are specific obligations and requirements. The most pressing obligation is to ensure that the rings on the attachment bearings of the main landing gear are correctly installed, as per the specifications outlined in the Socata TB Service Bulletin SB10.091.57. This involves precise adherence to the instructions provided in the bulletin to guarantee the integrity and safety of the landing gear system. Furthermore, the compliance period is set stringently: the corrective action must be completed within 50 hours of the aircraft being in service after 31 May 1995, or before 31 July 1995, whichever comes first. This timeline underscores the urgency and importance of the directive. Failure to comply with the requirements set forth in AD/TB20/31 could result in serious consequences. The regulations do not explicitly detail the specific civil or criminal penalties for non-compliance in this instance, but non-compliance with airworthiness directives generally can lead to severe repercussions. These can include the grounding of the aircraft until the directive is complied with, fines, and potential legal action. The overarching objective is to maintain the highest safety standards in aviation, and thus, any deviation from the stipulated directives can have significant ramifications for both the operators and the Civil Aviation Safety Authority (CASA).