Overview

The Civil Aviation Safety Authority (CASA) under the Civil Aviation Act 1988, enacted the Civil Aviation Regulations 1998 to provide comprehensive regulations governing all aspects of civil aviation operations within Australia. One of the aims of this regulatory framework is to ensure the safety of air travel by mandating compliance with specific safety directives. The regulation in question, AD/JETSTREAM/33, pertains to the British Aerospace BAe 3100 (Jetstream) Series Aeroplanes and specifically addresses the inhibition of TTL test and stall protection test functions during flight. This directive was introduced to prevent inadvertent selection of the TTL or stall protection test switches during flight, which could otherwise lead to unsafe conditions. Compliance with this directive is mandatory for aircraft that were required to adhere to the specified actions outlined in British Aerospace SB 24-JM7657A prior to 31 August 1989. The policy objective of this regulatory action is to enhance the safety of air travel by mitigating risks associated with the inadvertent activation of test functions that could compromise the aircraft’s operational integrity. By enforcing compliance with specific maintenance and operational protocols, CASA aims to uphold the highest standards of safety and reliability in civil aviation, ensuring the protection of passengers, crew, and the general public.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105 under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, addresses the safety concerns associated with the British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This legislation applies to all operators of the specified aircraft models, ensuring they adhere to stringent safety measures as outlined in the AD/JETSTREAM/33 directive. The regulation mandates compliance with British Aerospace Service Bulletin 24-JM7657A, which details the required action to inhibit the TTL test and stall protection test functions during flight, to prevent any inadvertent selection that might result in unsafe conditions. The directive is effective for aircraft that were compliant prior to 31 August 1989, and it extends its jurisdiction across the Commonwealth of Australia, encompassing all states and territories. There are no specified exclusions or exemptions in this directive, and compliance is mandatory for all affected aircraft. Any further application or interpretation of the directive may be extended or restricted through subordinate instruments issued by CASA.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contains the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives (ADs) which mandate the safety requirements for specific aircraft models. The relevant AD in this case is AD/JETSTREAM/33, which pertains to British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This particular directive addresses the inhibition of the TTL test and stall protection test functions during flight (section 1). The directive applies to the aircraft as listed in the Requirement Document (section 2) and mandates that action be taken in accordance with British Aerospace Service Bulletin 24-JM7657A (section 3). The compliance date for this directive is set prior to 31 August 1989 (section 4). Under this AD, operators of the British Aerospace BAe 3100 (Jetstream) Series Aeroplanes are obligated to ensure that the specified modifications are implemented to prevent inadvertent selection of the TTL or stall protection test switches during flight, thereby avoiding any unsafe conditions (section 5). The requirement is that operators must adhere to the instructions outlined in the British Aerospace Service Bulletin 24-JM7657A to achieve compliance with the AD (section 6). This involves making specific modifications to inhibit the test functions as described, which are critical to maintaining the safety and airworthiness of the aircraft. Failure to comply with the requirements of AD/JETSTREAM/33 could result in serious safety implications, as the inadvertent activation of the TTL or stall protection test functions during flight could lead to unsafe conditions (section 7). The AD does not explicitly mention offences or penalties within the text; however, non-compliance with CASA directives generally falls under the broader aviation safety regulations. In such cases, CASA has the authority to take enforcement actions, which could include fines, suspension or revocation of the aircraft's airworthiness certificate, and other administrative or legal actions against the operator or individual responsible for the non-compliance (section 8). The specific penalties are not detailed in the AD itself but are governed by the overarching Civil Aviation Act 1988 and associated regulations.