AD/HYD/1 - Sprague Engineering Hydraulic Accumulator - Modification

Overview

The Civil Aviation Regulations 1998 were enacted by the Parliament of Australia to establish and maintain safety standards for civil aviation. This legislation forms a critical part of the regulatory framework overseen by the Civil Aviation Safety Authority (CASA). Specifically, PART 39 - 107 of the Civil Aviation Regulations 1998 addresses the safety directives concerning hydraulic equipment, particularly the modifications required for Sprague Engineering Hydraulic NK Accumulators. The directive was introduced to address the potential safety risks associated with certain accumulator assemblies not fitted with steel end caps, as identified by the Sprague Engineering Modification Bulletin No. 2 and the FAA AD 70-10-4. The policy objective of this regulation is to ensure that the specified hydraulic accumulators meet the required safety standards, thereby reducing the risk of in-service failures and enhancing overall aviation safety.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically AD/HYD/1 concerning the Sprague Engineering Hydraulic NK Accumulator, applies to all aircraft equipped with Sprague Engineering Accumulator assemblies P/N A-200-25 and A-200-50 that are not fitted with steel end caps. This regulation is part of the Civil Aviation Regulations 1998 and is enforced under the authority of the Commonwealth of Australia, ensuring compliance across all states and territories. The directive mandates modifications based on specific compliance criteria, requiring aircraft components with 15,000 or more hours of total service time by 30 September 1970 to be modified within the next 1000 hours of service, while those with fewer than 15,000 hours must be modified before reaching 16,000 hours. Compliance must be achieved by following either Sprague Engineering Mod. Bulletin No. 2 or FAA AD 70-10-4. This legislative instrument does not explicitly mention exclusions, exemptions, or thresholds beyond those specified for the compliance timeline.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 107, includes the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives (AD), which governs the maintenance and modification of aircraft components to ensure safety. The AD in focus here is AD/HYD/1, concerning the modification of Sprague Engineering Hydraulic NK Accumulators (sections A-200-25 and A-200-50) that are not fitted with steel end caps. This directive applies to specific accumulators and requires modifications to ensure they meet airworthiness standards. The main operative sections of AD/HYD/1 outline the applicability and compliance requirements for the Sprague Engineering Hydraulic NK Accumulators. The directive is applicable to all assemblies with part numbers A-200-25 and A-200-50 that do not have steel end caps. Compliance is to be achieved by referring to either Sprague Engineering Modification Bulletin No. 2 or the Federal Aviation Administration (FAA) AD 70-10-4. The compliance timeline is contingent on the total time in service of the components as of 30 September 1970; those with 15,000 hours or more must comply within the next 1000 hours of service, while those with less than 15,000 hours must comply before reaching 16,000 hours of total service. Under the AD, operators and owners of aircraft equipped with the specified accumulators are obligated to ensure that the modifications are carried out in accordance with the referenced documents. This includes inspecting the accumulators to determine their service hours as of 30 September 1970, and scheduling the modifications accordingly. Operators must also maintain records of the modifications carried out to demonstrate compliance with the directive. Failure to comply with AD/HYD/1 can result in serious consequences. The AD is a mandatory requirement, and non-compliance can lead to enforcement actions by CASA. The potential penalties for non-compliance may include fines and legal action against the operators or owners of the aircraft. The specific penalties are determined by CASA, but they can be substantial, reflecting the critical importance of adhering to airworthiness directives to ensure the safety of air travel.