Overview

The Civil Aviation Regulations 1998, under which the Civil Aviation Safety Authority (CASA) operates, were enacted to provide for the regulation of civil aviation operations in Australia. One particular aspect of these regulations is the issuance of Airworthiness Directives (ADs), which are enforceable rules intended to address identified safety issues. AD/TB20/37 was introduced on 22 March 2001 to rectify an unsafe condition identified in the Aerospatiale (Socata) TB20 (Trinidad) Series aeroplanes. The Civil Aviation Safety Authority, acting as the delegate of the Commonwealth of Australia, issued this directive to mandate specific actions to mitigate the risk of a rupture in the rudder lower hinge fitting, which had been reported to potentially lead to a separation between the rudder and its control linkage. This AD specifically applies to all Model TB20 and TB21 aircraft that are over four years old or have accumulated more than 2,000 flight hours. The policy objective behind this directive is to ensure the continued airworthiness of the affected aircraft and thereby enhance the safety of civil aviation operations in Australia.

Scope and Application

The Airworthiness Directive (AD) outlined in the Civil Aviation Regulations 1998 applies to all Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, specifically Model TB20 and TB21 aircraft that are older than four years or have accumulated more than 2000 flight hours. This AD is issued by the delegate of the Civil Aviation Safety Authority (CASA) under the authority granted by the Civil Aviation Regulations 1998, which govern the safety standards of aircraft operations within Australia. The directive is applicable to aircraft registered and operated within Australia, thus extending CASA's jurisdictional reach over these specific aircraft models to ensure compliance with safety standards. The directive mandates a visual inspection of the rudder lower hinge fitting for cracks, with a requirement to repair any detected cracks in accordance with Socata repair No 20-018 before further flight. This requirement is to be followed as per the instructions detailed in Socata TB Service Bulletin No. SB 10-114-55, and compliance must be achieved during the next scheduled inspection after the AD's effective date of 22 March 2001, or by 22 May 2001 at the latest.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, include a specific Airworthiness Directive (AD) for the Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, identified as AD/TB20/37, which was issued on 3 March 2001. This directive pertains to all Model TB20 and TB21 aircraft that are more than four years old or have accumulated over 2000 flight hours. The directive requires a visual inspection of the rudder lower hinge fitting for any cracks, as per the instructions in Socata TB Service Bulletin No. SB 10-114-55. If a crack is found, the aircraft must be repaired in accordance with Socata repair No 20-018 before it can be flown again. This directive references DGAC AD 2001-002(A) and was issued in response to a reported separation between the rudder and its control linkage due to a rupture of the lower hinge fitting. Under this AD, the primary obligations for the relevant parties include conducting a thorough visual inspection of the rudder lower hinge fitting for any signs of cracks. This inspection must adhere to the instructions provided in the specified service bulletin. If any cracks are detected, the repairs must be executed in line with the guidance provided in the referenced Socata repair document. Furthermore, these actions must be completed during the next scheduled inspection following 22 March 2001, or at the latest by 22 May 2001. Failure to comply with these directives may result in the aircraft being deemed unsafe to fly until the necessary inspections and repairs are completed. In the event of non-compliance with the AD/TB20/37, the Civil Aviation Safety Authority (CASA) may impose various consequences. While the specific legal consequences are not detailed within the directive, it is understood that failure to adhere to such ADs can lead to enforcement actions, including potential civil or criminal penalties. The maximum penalties for violations of civil aviation regulations can be significant, often including substantial fines and, in severe cases, potential imprisonment. Additionally, operators may face operational restrictions or be required to ground the affected aircraft until the necessary compliance measures are implemented.