AD/PA-23/41 - Auxiliary Front Spar - Inspection

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines the Civil Aviation Safety Authority’s (CASA) Schedule of Airworthiness Directives, which were enacted to ensure the safety and airworthiness of aircraft operating within Australia. One such directive is AD/PA-23/41, which applies to Piper PA-23 (Apache and Aztec) series aeroplanes. This directive was introduced to address a specific safety concern regarding the auxiliary front spar, which has been identified as a potential area of structural weakness. The requirement set forth by this directive is that a visual inspection must be conducted on the web of the auxiliary front spar, particularly focusing on the area adjacent to rib P/N 16042 (STA 56), to detect any vertical cracks, especially near the bend radius. The directive mandates that this inspection must be completed within 50 hours of the aircraft’s time in service after 4 January 1971, ensuring ongoing aircraft safety and structural integrity. The enactment of this directive is a demonstration of CASA's commitment to maintaining stringent safety standards in civil aviation. The policy objective behind AD/PA-23/41 is to mitigate the risk of structural failure by requiring regular and thorough inspections of critical components of the aircraft. This proactive approach is intended to prevent potential accidents and ensure the reliability of the aircraft, thus safeguarding the lives of passengers and crew. The directive is a clear reflection of the regulatory framework's dedication to addressing identified safety issues promptly and effectively, thereby reinforcing the overall safety culture within the aviation industry.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all Piper PA-23 (Apache and Aztec) series aeroplanes. This legislation mandates that the web of the auxiliary front spar, identified by part number 16010, must be visually inspected at the outboard end in the area adjacent to rib part number 16042 (STA 56), with a particular focus on identifying vertical cracks, especially near the bend radius. This requirement must be fulfilled within 50 hours of time in service following 4 January 1971. The regulations are applicable across the Commonwealth of Australia and are enforced by the Civil Aviation Safety Authority, extending to all operators and aircraft falling under this category without any stated exclusions or exemptions. The scope of the directive is further managed and potentially expanded through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1998 (Cth), specifically AD/PA-23/41, pertain to the inspection of the auxiliary front spar for Piper PA-23 (Apache and Aztec) series aeroplanes. Section 39-105 requires that a visual inspection be carried out on the web of the auxiliary front spar, identified by part number 16010, at its outboard end, particularly in the area adjacent to rib part number 16042 (STA 56). The focus of this inspection is to identify any vertical cracks, especially those near the bend radius. This inspection is mandated within 50 hours of the aeroplane being in service after 4 January 1971. The Act imposes several obligations on the parties or entities it governs. Owners and operators of Piper PA-23 aeroplanes must ensure that the specified inspection is conducted by a qualified individual, typically a licensed aircraft maintenance engineer, within the stipulated timeframe. This requirement is critical for maintaining the airworthiness of the aircraft and ensuring safety standards are met. The regulations also necessitate that any findings from the inspection be documented appropriately and retained for future reference and audits. Failure to comply with the requirements set out in AD/PA-23/41 can lead to various consequences. From a regulatory perspective, non-compliance may result in enforcement actions by the Civil Aviation Safety Authority (CASA). Civil penalties may be imposed, which could include fines. The seriousness of the offence and the degree of negligence can influence the severity of the penalties. In extreme cases of non-compliance, criminal charges could be brought against the responsible parties, leading to more severe penalties, including imprisonment. The specific penalties are determined by the relevant legislation and the discretion of the court.