AD/P68/32 - Longitudinal Trim System

Overview

The Civil Aviation Regulations 1998, amended through legislative instrument F2006B05358, specifically address safety concerns related to the Partenavia P68 Series Aeroplanes. Enacted by the Commonwealth of Australia, this regulation was introduced to address persistent issues with the aircraft's longitudinal trim system, which had a history of safety-related problems. The Civil Aviation Safety Authority issued Airworthiness Directive AD/P68/32 to ensure that the stabilator trim system is regularly checked and adjusted according to the aircraft’s Maintenance Manual. The directive requires compliance within 25 hours of time in service after 12 July 1989, and then every 50 hours thereafter, aiming to maintain high maintenance integrity and ensure continued safe operation of the aircraft in its current configuration. The policy objective is to mitigate the risk of trim-related incidents by enforcing stringent and regular maintenance protocols.

Scope and Application

The Civil Aviation Safety Authority (CASA) Regulations 1998, specifically Part 39 - 105, address the airworthiness directives for aircraft including the Partenavia P68 Series Aeroplanes. This legislation applies to all models of the Partenavia P68 Series Aeroplanes, mandating a comprehensive check of the stabilator trim system to ensure it adheres to the specifications outlined in the aircraft Maintenance Manual. This directive necessitates adjustments to the trim system as required, with a compliance timeline demanding that these checks and necessary adjustments be conducted within 25 hours of time in service after 12 July 1989, and subsequently every 50 hours of time in service. The regulation underscores the importance of maintaining high maintenance integrity to ensure the continued safe operation of the aircraft's trim system, given its historical issues and recent deficiencies identified through testing. The directive does not currently exclude any models or circumstances but remains subject to further amendments as discussions with the manufacturer progress.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include a detailed schedule of airworthiness directives aimed at ensuring the safety of aircraft in Australian airspace. One such directive, AD/P68/32, pertains to the longitudinal trim system of Partenavia P68 series aeroplanes (Section 1). This directive requires that the stabilator trim system be checked and adjusted as necessary according to the specifications outlined in the aircraft's Maintenance Manual (Section 2). These requirements are intended to address known issues with the trim system of this model, which has historically experienced problems in this area. The directive mandates that the stabilator trim system must be inspected within 25 hours of time in service after the directive was issued on 12 July 1989, and subsequently, every 50 hours of time in service thereafter (Section 3). This regular maintenance schedule is critical to ensuring the continued safety and airworthiness of the aircraft, given the documented history of trim-related issues. The obligations imposed by AD/P68/32 are clear and specific. Aircraft operators must ensure that the stabilator trim system is thoroughly inspected and adjusted as required by the Maintenance Manual. This involves detailed checks and maintenance procedures to rectify any deficiencies identified during the inspection. Failure to comply with these requirements can result in the aircraft being deemed unairworthy, leading to potential grounding until the necessary adjustments and checks are performed. Non-compliance with AD/P68/32 can result in significant consequences. Civil Aviation Safety Authority (CASA) may impose administrative and legal penalties on operators who fail to adhere to the directive. The exact nature and severity of these penalties depend on the circumstances of the breach, but they can include fines and other sanctions. Additionally, if an aircraft is found to be non-compliant during an inspection, it could face operational restrictions or even be grounded until the required maintenance is completed. The potential penalties serve as a strong incentive for operators to ensure strict adherence to the directive to avoid these negative consequences.