AD/COOL/1 - Stewart Warner Oil Coolers - Inspection and Replacement

Overview

The Civil Aviation Regulations 1998 (Cth) were enacted by the Parliament of Australia and are administered by the Civil Aviation Safety Authority (CASA), which aims to ensure the safety of civil aviation in Australia. Part 39, specifically addressing Airworthiness Directives, was introduced to maintain the safety and reliability of aircraft by setting mandatory standards for aircraft maintenance, repair, and operation. The inclusion of Schedule AD/COOL/1 for Stewart Warner Oil Coolers underscores the importance of regular inspections and timely replacements of components that are critical to the safe operation of aircraft. This particular directive targets oil coolers of specific models and serial numbers, requiring rigorous checks to identify and address any potential failures within the stipulated timeframe, thereby mitigating risks associated with the in-service use of these components. The directive for Stewart Warner oil coolers aims to ensure that these components are inspected and, if necessary, replaced to maintain the integrity of the aircraft's engine oil system. By mandating inspections within 100 hours of service after a specified date, the regulation seeks to prevent operational failures that could compromise the safety of the aircraft. This proactive approach is integral to the overarching policy objective of ensuring the highest standards of safety in civil aviation, thereby protecting both the crew and passengers aboard the affected aircraft models.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39, governs the application of Airworthiness Directives (ADs) in Australia, and under this, AD/COOL/1 pertains to the inspection and replacement of certain Stewart Warner oil coolers. This directive applies to Stewart Warner oil coolers of particular models and serial numbers, namely Model 8406J with serial numbers ranging from 101 to 1500, Model 10599A with serial numbers from 101 to 700, Model 10568B with serial numbers from 101 to 579, and Model 10578B with serial numbers from 101 to 634. These oil coolers are installed in specific aircraft types, including certain models of Cessna, Lake, Grumman American, and Mooney M20 Series. The requirement is for these coolers to be inspected to determine if they fall within the specified model and serial number range, and if they do, they must be retired from service and replaced with a serviceable cooler that does not fall within the affected serial number range. Compliance with this directive is mandatory within 100 hours of time in service after 30 November 1976. The directive is enforceable across the Commonwealth of Australia, applying to all relevant aircraft operators within its jurisdiction.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998 (Cth), specifically within Part 39 - 107, focus on the Stewart Warner oil coolers identified in AD/COOL/1. Section 107.010 mandates that any Stewart Warner oil coolers of specific models and serial numbers must be inspected to determine their applicability (section 107.010). If the cooler falls within the affected range, it must be removed from service and replaced with a cooler that is not of the specified serial numbers (section 107.010). These coolers are particularly noted to be fitted to various aircraft models, including the 1976 and 1977 Model Cessna 172 and 177, the 1976 Model Cessna 177RG, the Consolidated Aeronautics Lake LA-4-200, the Grumman American Model AA-5A and AA-5B, and the Mooney M20 Series (section 107.010). The obligations imposed by the regulations on the parties or entities governed by these provisions include conducting a thorough inspection of the specified Stewart Warner oil coolers to ascertain if they fall within the serial number ranges mentioned. If the cooler is found to be within the affected serial number range, it must be immediately retired from service and replaced with a cooler that is outside the specified serial numbers. Compliance with these directives is mandatory, with inspections and replacements needing to be completed within 100 hours of time in service after 30 November 1976 (section 107.010). In terms of breaches and consequences, non-compliance with the requirements set out in AD/COOL/1 could lead to significant safety risks. While the regulations do not explicitly state penalties for non-compliance, failing to adhere to airworthiness directives can result in severe civil or criminal penalties under other sections of the Civil Aviation Act 1988 (Cth). Such penalties may include fines and imprisonment, depending on the severity of the breach and its impact on aviation safety. Additionally, operators may face operational restrictions or be subject to enforcement actions by the Civil Aviation Safety Authority (CASA) (section 107.010).