AD/SM-260/14 Amdt 1 - Governor Relief Valve Spring - Inspection

Overview

The Civil Aviation Regulations 1998, amended in 2006, established comprehensive regulations to ensure the safety and efficiency of civil aviation in Australia. Part 39, specifically dealing with airworthiness directives, includes amendments aimed at maintaining the highest safety standards for aircraft operations. This legislative instrument, administered by the Civil Aviation Safety Authority (CASA), targets the problem of potential mechanical failures in aircraft components, ensuring that such failures do not compromise flight safety. The policy objective is to mandate rigorous and timely inspections and maintenance to prevent incidents caused by component failures, thereby protecting both the crew and passengers. One particular airworthiness directive, AD/SM-260/14 Amendment 1, focuses on the inspection of relief valve springs in SIAI Marchetti F260 series aeroplanes. This directive responds to reports of spring breakages in specific propeller governors, which could lead to a dangerous overspeed condition. The regulation requires inspections by a specified date and at regular intervals to address this issue, ensuring that the aircraft remain compliant with safety standards. The directive corrects a prior typographical error to ensure accurate application, reinforcing the commitment to precision and safety in aviation regulations.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, mandates that certain airworthiness directives apply to all SIAI-Marchetti F260, F260B and F260C models equipped with specified propeller governors. These directives are set out in the SCHEDULE OF AIRWORTHINESS DIRECTIVES, which includes the AD/SM-260/14 Amendment 1 concerning the governor relief valve spring inspection. The directive applies to aeroplanes with particular Hartzell and SIAI equivalent propeller governor models listed in the SIAI Marchetti Service Bulletin 260 B35. The inspection is required by 31 July 1983 and must be repeated every maintenance release inspection for governors with a rectangular relief valve port, and every 500 hours of time in service for those with a round port. The directive addresses instances of spring breakage that could lead to an overspeed of the propeller, posing a safety risk. The regulation's scope is confined to the specified aircraft models and governor types, and it is applicable within the Commonwealth of Australia. No exclusions or exemptions are stated in the text provided, and the applicability is not extended or restricted by subordinate instruments mentioned here.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates that the Civil Aviation Safety Authority (CASA) issues airworthiness directives (ADs) to ensure the safe operation of aircraft. One such directive, AD/SM-260/14 Amendment 1, applies to SIAI-Marchetti F260, F260B, and F260C models equipped with certain propeller governors. This directive requires the inspection of relief valve springs in these governors to prevent breakage, which could lead to a dangerous overspeed of the propeller. The applicable governors are identified by specific part numbers, and the inspection must be carried out by 31 July 1983 and then at specified intervals thereafter. The obligations imposed by this legislation are precise and require adherence to the specified inspection schedules. For governors with a rectangular relief valve port, the inspection must occur by 31 July 1983 and then every maintenance release inspection. For those with a round relief valve port, the inspection must occur by the same date and then every 500 hours of time in service. Compliance with these requirements is essential to ensure the continued airworthiness of the aircraft. Failure to comply with the provisions of this airworthiness directive can have serious consequences. The legislation does not explicitly state the penalties or consequences for non-compliance, but under the broader framework of the Civil Aviation Act 1988, non-compliance with CASA directives can lead to severe civil and criminal penalties. These may include fines, imprisonment, or both, depending on the severity and impact of the non-compliance. Additionally, non-compliance can result in the grounding of the aircraft, affecting safety and operational continuity. The directive references a background note indicating instances of spring breakage in certain governors, which can cause a dangerous overspeed of the propeller. This highlights the critical nature of the inspection requirement. The directive also notes a correction to a typographical error in the original document, ensuring clarity and accuracy in the application of the directive. This attention to detail is crucial for the effective enforcement of airworthiness standards and the maintenance of safety in civil aviation.