AD/WILGA/2 - Stall Warning System

Overview

The Civil Aviation Regulations 1998, as amended, establish a comprehensive framework for ensuring the safety and reliability of civil aviation operations within Australia. Part 39 of these regulations, specifically within the Schedule of Airworthiness Directives, addresses the operational safety of particular aircraft models, including the PZL 104 (Wilga) series aeroplanes. This part of the legislation was enacted to address specific safety concerns related to these aircraft, ensuring that they meet stringent airworthiness standards. The policy objective behind this directive is to enhance flight safety by mandating specific modifications to the aircraft's stall warning system, thereby preventing inadvertent deactivation of the acoustic warning horn. This is achieved through the installation of a guard on the stall warning system's automatic switch, in line with a mandatory service bulletin issued by the General Inspectorate of Civil Aviation in Poland. The Australian Government, through the Civil Aviation Safety Authority, issues these airworthiness directives to ensure compliance with international safety standards and to mitigate any identified risks associated with the operation of specific aircraft models. The requirement to install the guard on the stall warning system automatic switch is aimed at preventing the unintentional deactivation of the acoustic warning horn, thus enhancing the overall safety of the aircraft and its occupants. This directive underscores the commitment to maintaining high safety standards in the Australian civil aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates the installation of a guard on the Stall Warning System automatic switch for all PZL-104 `Wilga 80’ aircraft. This requirement is established through Airworthiness Directive AD/WILGA/2, issued on 2 August 1995. The directive applies to all operators of PZL-104 `Wilga 80’ aircraft within the Commonwealth of Australia and is implemented to ensure compliance with safety standards set by the Civil Aviation Safety Authority (CASA). The regulation necessitates adherence to the instructions detailed in the PZL-Warszawa-Okecie Mandatory Service Bulletin 10493023, which was classified as Mandatory by the General Inspectorate of Civil Aviation in Poland. Operators must ensure that the installation of the guard on the Stall Warning System automatic switch is completed prior to 1 August 1995 to meet the regulatory requirements and maintain airworthiness.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, address the airworthiness directives related to certain aircraft models, including the PZL 104 (Wilga) series aeroplanes. In this instance, the regulation mandates the installation of a guard on the Stall Warning System automatic switch for all PZL-104 'Wilga 80' aircraft (section 1). This requirement is outlined in the AD/WILGA/2 directive, which was issued on 2 February 1995 and requires compliance before 1 August 1995 (section 2). The rationale behind this directive is to ensure that the Stall Warning System cannot be inadvertently switched off, thereby maintaining the functionality of the acoustic warning horn (section 3). This directive is based on a mandatory service bulletin issued by the General Inspectorate of Civil Aviation in Poland, which has classified the installation of this guard as essential (section 4). The Act imposes specific obligations on the operators and owners of PZL-104 'Wilga 80' aircraft. These parties must ensure that the guard on the Stall Warning System automatic switch is installed in accordance with the specified guidelines and timelines (section 5). The installation must adhere to the instructions provided in the mandatory service bulletin, PZL-Warszawa-Okecie Mandatory Service Bulletin 10493023, which outlines the technical specifications and procedures necessary for compliance (section 6). Operators and owners are also responsible for maintaining records and documentation that demonstrate compliance with the directive, which may be required for inspections or audits by the Civil Aviation Safety Authority (section 7). Failure to comply with the requirements set forth in the Civil Aviation Regulations 1998, particularly the airworthiness directive AD/WILGA/2, can result in significant consequences. The Civil Aviation Act 1988 provides for both civil and criminal penalties for non-compliance with airworthiness directives (section 8). Civil penalties may include fines, with the exact amount determined by the court, and the potential for ongoing financial penalties until compliance is achieved (section 9). Criminal penalties may also apply, with offenders facing imprisonment for up to two years or substantial fines, or both, depending on the severity and frequency of the non-compliance (section 10). These stringent measures underscore the importance of adhering to the specified airworthiness directives to ensure the safety and reliability of civil aviation operations.