AD/LA-4/3 Amdt 1 - Flap Pushrod Bearings - Inspection and Replacement

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, represent a crucial framework governing civil aviation safety across the nation. These regulations, particularly within Part 39, address the critical need to ensure the airworthiness of aircraft through various directives and amendments. One such amendment, AD/LA-4/3 Amendment 1, focuses on the inspection and replacement of flap pushrod bearings in specific models of aeroplanes, namely the Colonial C1 and C2, and the Lake LA-4 and LA-4-200, where certain pushrod assemblies are installed. This amendment was introduced to address safety concerns identified in these aircraft models, ensuring that they meet the required safety standards by mandating regular inspections and necessary maintenance to prevent potential failures that could compromise flight safety. The policy objective underpinning this regulation is to maintain and enhance the safety of civil aviation by enforcing stringent airworthiness standards and timely compliance checks.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the safety directives established by the Civil Aviation Safety Authority, focusing on the maintenance and operation of certain aircraft models. This particular legislation applies to the Colonial C1 and C2 models, as well as the Lake LA-4 and LA-4-200 models, provided they have 2-7811-7 pushrod assemblies installed and are not equipped with Heim HM-5G (Magnafluxed) rod ends. The regulation mandates that inspections and necessary replacements of flap pushrod bearings must be performed within specific timeframes: within 15 hours of service time following 5 January 1973, unless this maintenance was already carried out within the preceding 10 hours of service time, and subsequently at intervals not exceeding 25 hours of service time. This directive ensures that the specified aircraft models maintain their airworthiness according to stringent safety standards. The regulation applies across the Commonwealth of Australia and extends its authority through the issuance of subordinate instruments to further detail compliance and enforcement mechanisms.

Key Provisions

The key provisions of the AD/LA-4/3 Amendment 1, as part of the Civil Aviation Regulations 1998 (CARs), require specific actions concerning the inspection and replacement of flap pushrod bearings for certain aeroplane models. Section 39-105 of the CARs mandates that all Colonial C1 and C2, and Lake LA-4 and LA-4-200 models with 2-7811-7 pushrod assemblies installed, which are not fitted with Heim HM-5G (Magnafluxed) rod ends, must undergo the specified inspections and replacements (Section 39-105(1)). The compliance timeline necessitates that these inspections and replacements must occur within 15 hours of time in service after 5 January 1973, unless they were already performed within the last 10 hours of time in service, and then at intervals not exceeding 25 hours of time in service thereafter (Section 39-105(2)). The obligations imposed by this legislation are clear and require the operators of the specified aircraft models to ensure that the flap pushrod bearings are inspected and replaced according to the outlined schedule. Operators must comply with the stipulated timeline for the initial inspection and any subsequent inspections to maintain the airworthiness of the aircraft (Section 39-105(3)). This involves documenting the time in service and ensuring that the inspections and replacements are performed by qualified personnel using the referenced document, Consolidated Aeronautics SL No. 39A (Section 39-105(4)). Failure to adhere to these provisions can result in significant consequences. Operators who do not comply with the airworthiness directives may face civil or criminal penalties. Under the CARs, non-compliance can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). The specific penalties are not detailed within the text but generally include fines, suspension of airworthiness certificates, or other regulatory actions as deemed appropriate by CASA (Section 39-105(5)). The severity of the penalties can vary depending on the nature and extent of the non-compliance, with potential maximum penalties applicable under broader aviation legislation.