AD/SC7/4 - Engine Plenum Chamber Flexible Drain Lines - Installation

Overview

The Civil Aviation Regulations 1998, as amended, include a specific part, Part 39 - 105, which addresses the Authority’s schedule of airworthiness directives. This schedule is instrumental in ensuring that certain aircraft models comply with safety standards. One such directive is AD/SC7/4, which pertains to the installation of flexible drain lines in the engine plenum chamber of Short SC7 (Skyvan) Series 3 aeroplanes. This directive was introduced to address the issue of potential engine failures due to water accumulation in the engine plenum chamber, which was a critical safety concern. The regulations were enacted by the Parliament of Australia and aim to ensure that civil aviation operations are conducted with the utmost safety standards. The policy objective behind these regulations is to maintain and enhance air safety by enforcing specific maintenance and operational standards on aircraft.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 105, specifically addresses the Civil Aviation Safety Authority's schedule of airworthiness directives, including Short SC7 (Skyvan) Series Aeroplanes. This particular directive, AD/SC7/4, pertains to the installation of engine plenum chamber flexible drain lines and applies to all models of the Series 3 Skyvan aircraft. The directive mandates compliance with either Short SB No. 71-56, Rev. 1, or FAA AD 70-15-12 within 25 hours of time in service following 13 August 1970. This regulation is binding on all aircraft operators and maintenance personnel who are subject to the oversight of the Civil Aviation Safety Authority in Australia, ensuring that all Series 3 Skyvan aircraft meet the specified airworthiness criteria within the stipulated timeframe. The directive's geographic reach is national, as it applies uniformly across all Australian airspace and to all operators and entities involved in the maintenance and operation of these aircraft within the Commonwealth. There are no stated exclusions or exemptions in the directive, and the application is not extended or restricted through subordinate instruments beyond the specified compliance period and technical standards.

Key Provisions

The main operative sections of this legislation, specifically AD/SC7/4, pertain to the installation of engine plenum chamber flexible drain lines for Short SC7 (Skyvan) Series Aeroplanes. The directive requires that all models of Series 3 comply with either Short SB No. 71-56, Rev. 1, or FAA AD 70-15-12. Compliance must be achieved within 25 hours of time in service following the directive's issuance date of 13 August 1970. This requirement ensures that all relevant aircraft are equipped with the specified modifications to maintain airworthiness standards. The Civil Aviation Safety Authority (CASA) imposes several obligations on the parties or entities governed by this legislation. Primarily, operators of Short SC7 (Skyvan) Series Aeroplanes must ensure that the specified modifications are installed within the stipulated timeframe. This involves adhering to the technical instructions provided in either Short SB No. 71-56, Rev. 1, or FAA AD 70-15-12. The directive underscores the necessity of maintaining updated records and documentation to demonstrate compliance, ensuring that the aircraft meet all safety standards. Failure to comply with the provisions set out in AD/SC7/4 may result in civil or criminal consequences. The legislation does not specify maximum penalties in the provided text, but generally, non-compliance with CASA directives can lead to enforcement actions, including fines, suspension of airworthiness certificates, or other regulatory penalties. Additionally, if the non-compliance results in safety incidents or accidents, operators may face more severe criminal charges, reflecting the critical importance of adhering to airworthiness directives to ensure the safety of all aviation operations.