Overview

The Civil Aviation Regulations 1998, as part of the legislative framework governing aviation safety in Australia, were enacted to ensure the safety and efficiency of civil aviation operations. One specific regulation within this legislative framework is Part 39, which outlines various safety directives to address identified issues in aircraft operations. The regulation in question here is AD/TB10/18, specifically addressing Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. This directive was introduced to address a safety concern identified in the cabin door catch mechanism of these aircraft models. The problem at hand involved instances where the cabin door catches had cracked, potentially leading to failure of the door catch, a condition attributed to incorrect adjustment. The policy objective of this directive is to ensure the safety of these aircraft by mandating the inspection and replacement of cabin door catches in accordance with the technical requirements set forth by the French Directorate General for Civil Aviation (DGAC). The directive was enacted by the Civil Aviation Safety Authority (CASA) and is part of the broader regulatory effort to maintain high safety standards in Australian civil aviation. The requirement is for operators of the specified aircraft models to inspect and retire the cabin door catches as per the technical specifications of DGAC AD 91-143 (A) R1. This amendment came into effect on 12 December 1991, superseding the previous compliance date of 3 October 1991. The directive ensures that the specified aircraft continue to operate safely by addressing the identified risk associated with the cabin door catches.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 105, specifically address the maintenance and safety standards for the Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. This regulation applies directly to the operators and owners of these aircraft models, ensuring that they comply with the stipulated airworthiness directives. The directive mandates an inspection and replacement of the cabin door catches to prevent failures due to incorrect adjustment, as outlined in the DGAC AD 91-143 (A) R1. The compliance with this directive is crucial for maintaining the safety standards required by the Civil Aviation Safety Authority (CASA). The regulation has a national reach within Australia, applying to all operators and owners of the specified aircraft models regardless of their location within the Commonwealth. The applicability of this directive is explicitly limited to the TB9 and TB10 models, with no stated exclusions or exemptions in the text provided. The directive is effective from the date of its amendment, which was 12 December 1991, and any previous compliance dates have been superseded by this amendment. The detailed technical requirements and the specific part numbers for replacement catches are further elaborated in Socata TB SB 58/1.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39, mandate adherence to the provisions outlined in the Schedule of Airworthiness Directives for various aircraft models, including the Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. Section 39-105 of these regulations details specific directives applicable to these aircraft, ensuring their continued airworthiness and safety. One such directive, AD/TB10/18 Amendment 1, focuses on the cabin door catch for these models. According to this directive (Section 12/91), operators are required to inspect and retire the cabin door catches in line with the technical specifications of DGAC AD 91-14-3 (A) R1. This mandate is crucial as instances of cracked catches on cabin access doors have been linked to incorrect adjustments, which could lead to door catch failure. The obligations imposed by this directive are clear: operators must conduct a thorough inspection of the cabin door catches on their TB9 and TB10 aeroplanes. This inspection must be carried out in accordance with the technical requirements specified in DGAC AD 91-14-3 (A) R1. If any catches are found to be cracked or otherwise compromised, they must be retired and replaced with new catches, as referenced in Socata TB SB 58/1. The directive ensures that these safety-critical components are maintained to prevent potential failures that could endanger the aircraft and its occupants. Failure to comply with the requirements of this directive can have serious consequences. The regulations establish clear penalties and legal ramifications for non-compliance. Operators found to be in breach of these safety directives may face civil or criminal penalties, depending on the severity and impact of the non-compliance. The specific penalties, including potential fines and imprisonment, are detailed in other sections of the Civil Aviation Regulations 1998. Adhering to these mandates is not only a regulatory requirement but also a fundamental aspect of ensuring the safety and operational integrity of the aircraft in question.