AD/PA-24/28 Amdt 1 - Normal Operating and Never Exceed Speed Limitations - Reduction

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, incorporates Airworthiness Directives (ADs) issued by the Civil Aviation Safety Authority (CASA). This legislation, enacted by the Commonwealth of Australia, aims to ensure that all civil aviation operations maintain the highest standards of safety, particularly through the regulation of airworthiness. One such directive, AD/PA-24/28, targets the Piper PA-24 (Comanche) series aeroplanes, mandating specific speed limitations to mitigate risks associated with operating these aircraft beyond certain velocity thresholds. The policy objective here is to enhance flight safety by reducing the normal operating speed (Vno) and never exceed speed (Vne) for specified models of the Piper PA-24 series, ensuring that pilots adhere to these critical parameters to prevent potential aerodynamic failures. The directive applies to Piper PA24, PA24-250, and PA24-260 models, requiring adjustments to speed limitations based on whether the aircraft incorporates a Rudder Balance Weight Installation Kit. This amendment not only reflects the Federal Aviation Administration's AD Piper 72-22-5 but also incorporates subsequent amendments to ensure compliance with evolving safety standards. CASA's role in enforcing these regulations is pivotal, as it seeks to maintain operational safety and prevent accidents by imposing stringent airworthiness criteria.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, encompasses the Civil Aviation Safety Authority's Schedule of Airworthiness Directives which apply to various aircraft models. In the case of Piper PA-24 (Comanche) series aeroplanes, Airworthiness Directive AD/PA-24/28 Amendment 1 mandates a reduction in the normal operating and never exceed speeds for specific models. This directive applies to models PA24, PA24-250, and PA24-260, setting new speed limitations based on whether or not the aircraft incorporates the Rudder Balance Weight Installation Kit. The directive necessitates a compliance timeline, with different deadlines for aircraft manufactured before and after 10 November 1972. The scope of this legislation is geographically national, as it pertains to all aircraft operating within Australia, and it extends to any entities or individuals operating these specific Piper models. The directive does not explicitly state exclusions or thresholds, but it does provide specific speed reductions that must be adhered to for airworthiness compliance.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically Part 39 - 105, concerning the Piper PA-24 (Comanche) series aeroplanes, are outlined in Airworthiness Directive (AD) AD/PA-24/28 Amendment 1. This directive pertains to the reduction of normal operating and never exceed speeds for certain Piper PA-24 models (sections 1 and 2). The directive mandates that for aircraft models PA24, PA24-250, and PA24-260, the maximum operating and never exceed speeds are to be reduced. For aircraft not equipped with the Rudder Balance Weight Installation Kit, Piper P/N 760705, the Vne speed must be reduced to 160 knots indicated airspeed (IAS) for the PA-24, while the PA24-250 and PA24-260 must reduce their Vno to 147 knots IAS and Vne to 165 knots IAS. For aircraft that do include the Rudder Balance Weight Installation Kit, the Vne speed must be reduced to 172 knots IAS for the PA-24, while the PA24-250 and PA24-260 must reduce their Vno to 158 knots IAS and Vne to 179 knots IAS. There is an exception noted for PA24-250 and PA24-260 models equipped with both the Rudder Balance Weight Installation Kit and the Stabilator Piper Service Kit No. 760747, where the Vne speed may be increased to 201 knots. Under the AD/PA-24/28 Amendment 1, compliance requirements are stringent. For aircraft not incorporating the Rudder Balance Weight Installation Kit, compliance must be achieved before 10 November 1972. For those aircraft that do incorporate the Rudder Balance Weight Installation Kit, compliance must be achieved within 30 days after 10 November 1972. These timelines are critical, and failure to adhere to the specified compliance dates could result in non-compliance with civil aviation safety standards. The directive ensures that all aircraft meet the required safety standards to prevent overstressing or structural failure during operation. Failure to comply with the provisions of AD/PA-24/28 Amendment 1 could result in significant consequences. The Civil Aviation Safety Authority (CASA) may impose various penalties for non-compliance with the Civil Aviation Regulations 1998. In cases of non-compliance, penalties may include fines, suspension or revocation of airworthiness certificates, and other regulatory actions deemed necessary to enforce compliance. The exact penalties may vary based on the severity and frequency of non-compliance, but they are intended to ensure that all aircraft remain airworthy and comply with safety standards. Additionally, failure to adhere to these directives could result in legal action against the aircraft operators or owners, further compounding the consequences of non-compliance.