AD/GAF-N22/73 - Rudder Pedals Brake Push Rod

Overview

The Civil Aviation Regulations 1998, as amended by the Legislative instrument F2006B10223, specifically addresses safety concerns associated with the GAF N22 and N24 series aeroplanes through the Airworthiness Directive (AD) pertaining to rudder pedal brake push rods. This legislation was enacted to ensure that the identified safety issue—failure of the brake push rod due to an excessively deep lightening hole in the end fitting—is rectified, thus enhancing the overall safety and reliability of these aircraft. The Australian Parliament enacted this regulation under the authority granted by the Civil Aviation Act 1988, aiming to maintain stringent safety standards within the aviation industry. Compliance with this directive ensures that maintenance releases are issued only after the specified action is taken, thereby mitigating risks associated with potential mechanical failures.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, pertains to the GAF N22 and N24 series aeroplanes, with a focus on the rudder pedals brake push rod as outlined in AD/GAF-N22/73 issued on 8/95. This legislation applies to all models of N22 and N24 aeroplanes and mandates that action be taken in accordance with the ASTA Nomad Service Bulletin NMD-27-47 Revision 1. Compliance with this directive must be achieved at the next inspection for a Maintenance Release issue after 20 July 1995, or prior to 31 October 1995, whichever comes first. This requirement stems from a reported failure of the brake push rod end fitting, where an investigation found that the excessive depth of the lightening hole in the end fitting was the cause of the rod fitting failure. The scope and application of this Act are clearly defined, targeting specific models of aircraft and setting a precise timeframe for compliance to ensure airworthiness standards are maintained.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39-105 under the Civil Aviation Safety Authority, outlines the Airworthiness Directives for the GAF N22 and N24 Series Aeroplanes. This directive, AD/GAF-N22/73, pertains to the rudder pedals brake push rod, and it is applicable to all models N22 and N24. The directive requires action in accordance with the Australian Standard Technical Airworthiness Authority (ASTA) Nomad Service Bulletin (SB) NMD-27-47 Revision 1. This requirement necessitates compliance at the next inspection for maintenance release issue following 20 July 1995, or before 31 October 1995, whichever comes first. The directive was issued due to reported failures of the brake push rod end fitting, where it was found that the excessive depth of the lightening hole in the end fitting caused the rod fitting to fail. The obligations imposed by this directive are clear and specific. Operators of N22 and N24 aircraft must ensure that the brake push rod is inspected and, if necessary, modified according to the specified service bulletin. This involves reviewing the depth of the lightening hole in the end fitting of the brake push rod and making any required adjustments to ensure compliance with the safety standards set forth in the ASTA SB NMD-27-47 Revision 1. The directive mandates that this action be taken within the specified timeframe to maintain the airworthiness of the aircraft. Failure to adhere to this directive could result in significant safety risks, including potential in-flight failures that could compromise the control and safety of the aircraft. In terms of consequences, non-compliance with the AD/GAF-N22/73 directive could lead to severe civil and criminal penalties. Under the Civil Aviation Act 1988, operators who fail to comply with airworthiness directives can be subject to enforcement actions. This can include fines, the suspension or revocation of air operator certificates, and potential criminal charges for negligence or failure to ensure the airworthiness of the aircraft. The maximum penalties for such offences can be substantial, reflecting the seriousness of maintaining safe aviation practices. It is essential that all operators of N22 and N24 aircraft take this directive seriously and ensure that the required actions are completed within the stipulated timeframe to avoid these serious consequences.