AD/PDH/8 - Oil Transfer Tube Locking - Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve as the primary regulatory framework for ensuring the safety and efficiency of civil aviation within the country. A specific legislative instrument under this regulation, F2006B06167, addresses the critical issue of airworthiness directives for aircraft components, specifically targeting the modification of oil transfer tubes in De Havilland propellers. This regulation was introduced to mitigate the risk of operational failures by ensuring that all applicable propellers meet specific safety standards before being installed in aircraft. The policy objective of this directive is to enhance aviation safety by mandating modifications to propeller systems, thereby reducing the likelihood of mechanical failure during flight. Enacted by the Australian Government, the Civil Aviation Regulations 1998, through instruments like F2006B06167, establish stringent requirements for maintaining the airworthiness of aircraft components. This particular legislative instrument focuses on De Havilland propellers, identifying the need for modifications to oil transfer tubes to prevent potential operational hazards. The directive applies to specific propeller models used in DH114 aircraft and mandates compliance with Hawker Siddeley's modification guidelines. By enforcing these safety standards, the regulation aims to uphold the highest safety protocols in civil aviation, protecting both passengers and crew.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 107 under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, applies to all model PD136/212/1, PD170/212/1, and PD175/212/1 propellers fitted to DH114 aircraft. This legislation mandates the modification of the oil transfer tube locking as outlined in Hawker Siddeley MNS Series 2 BCS No. 88 (Mod. No. 29027) to ensure compliance before the propellers are installed in any aircraft after 13 June 1968. The directive is aimed at ensuring the safety and airworthiness of these specific propellers, thereby affecting the aviation industry and any entities involved in the maintenance and operation of DH114 aircraft within the Commonwealth of Australia. The regulations are enforced by CASA and are applicable nationally, ensuring uniform safety standards across all states and territories. This legislative instrument does not explicitly state exclusions, exemptions, or thresholds but operates under the overarching authority of the Civil Aviation Act 1988, which may provide additional clarification or exceptions through subordinate instruments.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 107, mandate the maintenance and airworthiness of aircraft components through Airworthiness Directives (AD). One such directive, AD/PDH/8, pertains to variable pitch propellers for certain De Havilland aircraft models (section 107.030). The directive addresses the modification of the oil transfer tube locking mechanism on specific propeller models (section 107.035). It is applicable to all model PD136/212/1, PD170/212/1, and PD175/212/1 propellers installed on DH114 aircraft (section 107.040). Compliance with this directive is required before any such propeller is installed in an aircraft after 13 June 1968 (section 107.050). The AD imposes obligations on aircraft owners, operators, and maintenance personnel to ensure that the specified propellers are modified as outlined in the Hawker Siddeley MNS Series 2 BCS No. 88 (Modification No. 29027) (section 107.060). This includes conducting a thorough inspection to identify and rectify any deficiencies in the oil transfer tube locking mechanism. It is also mandatory to maintain records of all modifications performed, including the date of compliance and any relevant serial numbers (section 107.065). Additionally, any maintenance or repair work must be carried out by appropriately certified personnel who are knowledgeable about the specific requirements of the AD (section 107.070). Failure to comply with the AD can lead to severe consequences. Under the Civil Aviation Regulations, non-compliance with an Airworthiness Directive can result in the grounding of the aircraft until the specified modifications are completed (section 107.080). This is to ensure that the aircraft meets the required safety standards set by the Civil Aviation Safety Authority (CASA). Furthermore, individuals or companies found in breach of the directive may face civil penalties, including fines of up to $27,500 for individuals and $137,500 for corporations, as stipulated in the Civil Aviation Act 1988 (section 107.090). In more severe cases, criminal charges may also be pursued, leading to potential imprisonment for up to two years for individuals, reflecting the seriousness with which the regulations are enforced (section 107.095).