AD/DO-27/6 - Fuel and Oil Hose Assemblies - Inspection

Overview

The Civil Aviation Regulations 1998, amended in 2006, was enacted by the Parliament of the Commonwealth of Australia to address the need for stringent safety standards within the civil aviation industry. These regulations are designed to ensure that all aircraft and related operations within Australian airspace meet high safety and maintenance standards. The specific legislation in focus is Part 39 - 105, which pertains to the Civil Aviation Safety Authority (CASA) schedule of airworthiness directives. This part of the regulation aims to address and rectify safety issues identified in specific aircraft models, ensuring that all operational aircraft maintain the highest safety standards. The policy objective is clear: to enhance the safety of civil aviation by mandating regular inspections and maintenance of critical aircraft components, such as the fuel and oil hose assemblies in Dornier DO-27 series aeroplanes.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105 and the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, mandates that all Dornier DO-27 series aeroplanes equipped with German Standard LN9226 fuel and oil system hoses must adhere to certain inspection requirements. These regulations apply to aircraft that have specific characteristics, namely those with Technochemie end fittings installed or supplied as spares by the Dornier factory between 1 December 1964 and 1 September 1965, and have not been subsequently returned to Dornier for checking. The directive mandates that affected fuel and oil system hose assemblies must be inspected for internal damage and obstruction of the bore, as specified in Dornier TB No. 27-29 Second Edition, with reference also to German AD No. 65-85. Furthermore, hoses that are already installed must be inspected within the next 100 hours of time in service following 2 November 1967, while spare hoses must be inspected before installation and again within the first 100 hours of service. This regulatory framework applies nationally within the Commonwealth of Australia, ensuring uniformity in compliance across all jurisdictions.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, in the context of the Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically addresses Dornier DO-27 series aeroplanes (section 1). This legislation mandates the inspection of certain fuel and oil hose assemblies on these aircraft. Section 2 of the directive applies to all Dornier DO-27 series aeroplanes equipped with German Standard LN9226 fuel and oil system hoses that have specific characteristics, including having Technochemie end fittings and being installed or supplied as spares by the Dornier factory between 1 December 1964 and 1 September 1965, and not subsequently returned to Dornier for checking. The requirement (section 3) is to inspect the affected fuel and oil system hose assemblies for internal damage and obstruction of the bore as specified in Dornier TB No. 27-29 Second Edition. The German AD No. 65-85 also pertains to this inspection requirement. Additionally, section 4 provides a note that Dornier TB No. 28-26A contains information on identifying Technochemie end fittings, which is crucial for the proper execution of this inspection. The obligations imposed by this directive (section 5) are specific to the inspection schedule of the hoses. For installed hoses, the inspection must be carried out unless it has already been done after 1 September 1965. This inspection should be performed within the next 100 hours of time in service following 2 November 1967. For spare hoses, the inspection must occur before installation, and then again within the first 100 hours of time in service. Failure to comply with the requirements set out in this directive may result in serious safety hazards (section 6). While the specific penalties or consequences for non-compliance are not detailed within the legislative instrument, the overarching regulations of the Civil Aviation Regulations 1998 provide a framework within which such breaches can be addressed. This may include enforcement actions, fines, or other regulatory measures by the Civil Aviation Safety Authority to ensure compliance with airworthiness standards.