AD/SM-205/31 Amdt 1 - Landing Gear Dampers

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the maintenance requirements for SIAI Marchetti S205 and S208 series aeroplanes through Airworthiness Directives. This legislation, enacted by the Australian Parliament, aims to ensure the safety and reliability of aircraft in operation by mandating specific maintenance actions. For the S205 and S208 series, the directive AD/SM-205/31 Amendment 1 focuses on the landing gear dampers, aiming to prevent deformation and cracking of the rubber damper assemblies which could compromise the aircraft's safety. Compliance with these regulations is crucial to avoid potential operational hazards and ensure the longevity and safety of the aircraft in service.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives for SIAI Marchetti S205 and S208 Series Aeroplanes, applies to all models S205-18/R, 20/R, 22/R, S208, and S208A. This legislation mandates the replacement of landing gear dampers in compliance with SIAI Marchetti SB No. 205B49A. The requirement necessitates adherence to specific time intervals for compliance, including action within 100 hours of time in service after 31 August 1979, and thereafter at intervals not exceeding 500 hours. Shock absorber units must be replaced based on their age or hours of service, with new units needed for those exceeding 5 years from the date of manufacture or 1000 hours of time in service, and for units less than 5 years old or 1000 hours old before they accumulate these thresholds. The legislation is applicable nationwide, covering all civil aviation activities within Australia, and it extends its reach through subordinate instruments that may provide further detail or modifications. There are no stated exclusions or exemptions in this directive, which aims to prevent deformation and cracking of the rubber damper assemblies that could interfere with the down locking action of the main landing gear.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, address the airworthiness of certain aircraft models, including the SIAI Marchetti S205 and S208 series aeroplanes, with a focus on the landing gear dampers as detailed in AD/SM-205/31 Amendment 1. The regulations mandate that all models S205-18/R, 20/R, 22/R, S208, and S208A must comply with the provisions outlined in SIAI Marchetti SB No. 205B49A. This includes adhering to the manufacturer's life limits on the shock absorber units to prevent deformation and cracking, which could compromise the down locking action of the main landing gear. These regulations impose clear obligations on the operators of the specified aircraft models. Firstly, operators must ensure that the shock absorber units are replaced or inspected within specific timeframes. For shock absorber units that are greater than 5 years old or have accumulated over 1000 hours of service, replacement is required within 100 hours of time in service after 31 August 1979 and thereafter at intervals not exceeding 500 hours. Secondly, for shock absorber units with less than 5 years of age or fewer than 1000 hours of service, they must be replaced prior to reaching these limits. These requirements ensure that the landing gear dampers are maintained in a safe and reliable condition throughout the aircraft's operational life. Failure to comply with these airworthiness directives could lead to serious safety issues, potentially resulting in civil or criminal penalties. While the specific penalties are not detailed within this extract, breaches of airworthiness regulations generally carry significant consequences. Civil penalties can include fines and the potential grounding of the aircraft until compliance is achieved. Criminal penalties may also apply, depending on the severity of the breach and its impact on aviation safety. Such penalties underscore the importance of adhering to the stipulated maintenance and inspection schedules to ensure the safety and airworthiness of the aircraft.