AD/SWSA226/66 - Nose Wheel Steering System

Overview

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, addresses the safety of civil aviation through the Civil Aviation Safety Authority’s (CASA) Schedule of Airworthiness Directives. The enactment of this regulation is a response to identified issues related to the operational safety of Fairchild (Swearingen) SA226 and SA227 series aeroplanes. This legislative instrument aims to mitigate risks associated with the nose wheel steering system of these aircraft models, ensuring that flight operations adhere to stringent safety standards. The policy objective is to prevent accidents and incidents caused by malfunctions in the nose wheel steering system, as evidenced by previous occurrences in similarly modified aircraft. The Civil Aviation Regulations were enacted by the Commonwealth of Australia through the Australian Parliament, reflecting a commitment to safeguarding the aviation industry by addressing specific safety gaps. The regulation requires modifications to the Flight Manual and strict adherence to operational procedures for nose wheel steering systems on affected aircraft models, ensuring that pilots are fully informed of limitations and restrictions. This directive underscores the importance of regulatory oversight in maintaining high safety standards within the civil aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the application of airworthiness directives by the Civil Aviation Safety Authority, with a particular focus on Fairchild (Swearingen) SA226 and SA227 series aeroplanes. This legislation applies to the specified models of these aeroplanes that have undergone a particular nose wheel steering system modification. The geographic reach of this regulation is national, as it applies to all civil aviation activities within the Commonwealth of Australia. The directive sets out specific requirements for a Flight Manual Amendment, which must be obtained from a District Airworthiness Office and included in the Limitations Section of the Flight Manual to address the limitations of the nose wheel steering system. Compliance with these directives is mandatory for the specified models and serial numbers, and failure to adhere to the requirements could result in safety violations. The directive does not specify any exclusions or exemptions, and it extends its reach through subordinate instruments that may provide further detail on the implementation and compliance procedures.

Key Provisions

The Civil Aviation Regulations 1998, particularly in Part 39 - 105, mandate specific requirements and directives for the airworthiness of certain Fairchild (Swearingen) SA226 and SA227 series aeroplanes. One such directive, AD/SWSA226/66, pertains to the nose wheel steering system on these models (Section 8/93). This directive applies to SA227-TT, SA227-AT, SA227-AC, and SA227-BC models that have undergone a specific nose wheel steering system modification as detailed in Fairchild Service Bulletin 227-32-030, as well as SA227-DC models with serial numbers 784, and 790 through 825. The primary requirement of this directive is that a Flight Manual Amendment must be obtained from a District Airworthiness Office and incorporated into the Limitations Section of the Flight Manual. This amendment outlines specific limitations on the use of the nose wheel steering system, which must be checked prior to each takeoff using the procedures in the Normal Procedures section of the Flight Manual. Importantly, the use of nose wheel steering for takeoff and landing is strictly prohibited. Before each takeoff, the nose wheel arm switch must be turned to “OFF” and must not be turned to “ON” until after landing and the aircraft has slowed to taxi speed. Under these regulations, operators of the specified aircraft must ensure compliance with the directive by obtaining the necessary Flight Manual Amendment and updating their flight manuals accordingly. This includes ensuring that all pilots are aware of the new limitations and procedures concerning the nose wheel steering system. The directive references FAA AD 93-08-09 Amdt 39-8556, indicating a collaborative approach between Australian and US aviation authorities in addressing this safety issue. Compliance with this directive is required before 31 August 1993, highlighting the urgency and importance of implementing these safety measures. Failure to comply with the requirements set out in AD/SWSA226/66 could result in serious consequences. The Civil Aviation Regulations 1998 impose obligations on aircraft operators to adhere to airworthiness directives to ensure the safety of the aircraft and its occupants. Non-compliance can lead to significant penalties and legal repercussions. While the specific penalties for breaching these regulations are not detailed in the provided text, the overarching consequences can include fines, suspension or revocation of airworthiness certificates, and potential criminal charges if the breach results in an aviation incident or accident. It is imperative for operators to meticulously follow these directives to avoid such severe outcomes.