COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series
AD/ALF/6 Replacement of Fuel By-Pass Valve In Dual Heat Exchanger
6/87
Applicability: ALF 502R series which have dual heat exchanger P/N 2-303-491-01 installed.
Requirement: Remove from service or rework dual heat exchangers P/N 2-303-491-01 in accordance with Lycoming SB ALF 502R-79-0151 Rev 1.
Compliance: Unless already accomplished within 100 flights after 4 June 1987 but not later than 31 July 1987.
Background: This Directive is issued requiring the installation of a new fuel by-pass valve which will prevent engine fuel system icing when fuel load temperature at take-off is above 10º C.
Overview
The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B02320, focus on maintaining the airworthiness of aircraft within Australia. This legislation, enacted by the Australian Parliament, seeks to ensure that all civil aviation operations adhere to the highest safety standards, thereby addressing potential safety gaps in the operation of aircraft. The specific directive, AD/ALF/6, pertains to the replacement of the fuel by-pass valve in the dual heat exchanger of the AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series. The policy objective is to mitigate the risk of engine fuel system icing, which can occur when the fuel load temperature at take-off exceeds 10 degrees Celsius. This legislative measure mandates that the dual heat exchangers, specifically those with the part number 2-303-491-01, must either be removed from service or reworked in accordance with the Lycoming Service Bulletin ALF 502R-79-0151 Rev 1. Compliance with this directive is required within 100 flights after 4 June 1987, but no later than 31 July 1987.
Scope and Application
The Civil Aviation Regulations 1998, as amended, apply to all aircraft operations within Australian territory, and to all aircraft registered in Australia, regardless of where they are operating. Specifically, Part 39, 106 of the Civil Aviation Regulations 1998, pertains to airworthiness directives and mandates compliance with the provisions of the applicable airworthiness directives, which are issued by the Civil Aviation Safety Authority (CASA). These directives are crucial for maintaining the airworthiness of aircraft and ensuring the safety of civil aviation. The AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series AD/ALF/6 pertains to engines with dual heat exchanger P/N 2-303-491-01 installed and requires the replacement of the fuel by-pass valve in accordance with Lycoming Service Bulletin ALF 502R-79-0151 Rev 1. This directive applies to engines that have not yet complied with the requirement within 100 flights after 4 June 1987 but no later than 31 July 1987. Non-compliance with these airworthiness directives may result in the grounding of the aircraft and potential legal consequences. The scope of these regulations extends to all persons and entities involved in the operation of the aircraft, including owners, operators, and maintenance personnel.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 106 and the AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series Airworthiness Directive AD/ALF/6 (paragraph 6/87), mandates the replacement of the fuel bypass valve in the dual heat exchanger of ALF 502R series engines. These are engines equipped with a dual heat exchanger part number 2-303-491-01. The directive stipulates that the dual heat exchangers must either be removed from service or reworked in accordance with Lycoming Service Bulletin ALF 502R-79-0151 Revision 1 (section 6/87). This action must be completed unless it has already been undertaken within 100 flights after the directive's issuance date of 4 June 1987, but in any case, it must be completed by 31 July 1987. The directive is designed to prevent engine fuel system icing, particularly when the fuel load temperature at take-off exceeds 10°C.
Under the Civil Aviation Regulations 1998, the entities governed by this Act, which include aircraft owners, operators, and maintenance providers, are obligated to ensure compliance with the specified requirements for the ALF 502R series engines. This involves either removing the dual heat exchangers from service or reworking them as per the prescribed Lycoming service bulletin. The compliance timeline is crucial, as the work must be completed within the stipulated period to maintain airworthiness and safety standards.
Failure to adhere to the provisions outlined in the AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series Airworthiness Directive AD/ALF/6 can result in significant consequences. Non-compliance with airworthiness directives can lead to severe penalties, including fines, suspension or revocation of the aircraft's operating certificate, and potential legal action. The exact penalties are not specified in the directive but can include substantial financial penalties and operational restrictions under the broader regulatory framework of the Civil Aviation Regulations 1998. Ensuring adherence to this directive is critical to maintaining the safety and airworthiness of the affected aircraft.