AD/CF700/4 - Stage 1 Turbine Wheel

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 106, address the safety and airworthiness of aircraft through a series of airworthiness directives issued by the Civil Aviation Safety Authority. One such directive, AD/CF700/4, pertains to General Electric Turbine Engines of the CF700 Series, focusing on Stage 1 turbine wheels. Enacted in 1985, this directive was introduced to address specific safety concerns associated with certain CF700-2C engines, particularly those fitted with Stage 1 turbine wheels part number 634E58P4 with serial numbers up to and including 5499, and wheel assemblies part number 841B690P6. The policy objective of this directive is to ensure compliance with safety standards as outlined in the requirement documents, such as General Electric SB (CF700) A72-70, thereby enhancing the overall safety of civil aviation operations. This directive is a legislative instrument enacted by the Commonwealth of Australia, reflecting the commitment to stringent aviation safety measures.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, applies to all entities and individuals involved in the operation and maintenance of General Electric Turbine Engines, particularly the CF700 series. This includes aircraft operators, maintenance organisations, and any other entities responsible for ensuring the airworthiness of aircraft fitted with the specified CF700-2C engines and their associated turbine wheels. The regulation's geographic reach is national, applying across the entire Commonwealth of Australia and ensuring consistent safety standards are upheld throughout the industry. The directive mandates compliance with specific airworthiness directives (AD) such as AD/CF700/4 and AD/GE-T/12, which detail necessary actions for addressing identified safety concerns with Stage 1 turbine wheels. Exclusions or exemptions from this regulation are not specified within the text, indicating that all applicable aircraft must comply without exception. The regulation may also be extended or restricted through subordinate instruments, providing flexibility to address specific operational or technical circumstances.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes provisions that address the airworthiness of turbine engines, particularly those from the CF700 series manufactured by General Electric. Within this section, AD/CF700/4 is a key directive that pertains to the Stage 1 turbine wheel. According to the legislation, this directive applies to all CF700-2C engines equipped with Stage 1 turbine wheels bearing the part number 634E58P4, with serial numbers up to and including 5499, as well as all wheel assemblies with the part number 841B690P6 (Section 9/85). The directive mandates that compliance must be achieved as detailed in the requirement document, which is referenced as General Electric SB (CF700) A72-70 or AD/GE-T/12. This implies that any entity operating an aircraft fitted with the specified turbine engines must ensure that the turbine wheels meet the stipulated safety and airworthiness criteria laid out in these documents. This requirement underscores the importance of adhering to manufacturer-specific service bulletins and airworthiness directives to maintain the integrity and safety of the aircraft. In terms of obligations, the Act imposes a clear responsibility on operators of the affected aircraft to implement the compliance measures detailed in the requirement documents. This involves inspecting, repairing, or replacing the Stage 1 turbine wheels as necessary to meet the specified standards. Failure to comply with these directives could result in the aircraft being deemed unairworthy, potentially leading to grounding of the aircraft until the necessary actions are taken. Should an operator or entity fail to adhere to these provisions, there are significant consequences. The Act does not explicitly state penalties within the provided text, but it is understood that non-compliance with airworthiness directives can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions may include fines, enforcement notices, or other regulatory measures. Furthermore, in the event of an accident or incident resulting from non-compliance, the operator could face both civil and criminal liabilities, which may include substantial fines and imprisonment, depending on the severity of the breach and its impact on aviation safety.