Overview

The Commonwealth of Australia, through the Civil Aviation Safety Authority (CASA), introduced the Civil Aviation Regulations 1998, specifically Part 39 - 105, which includes the Airworthiness Directives aimed at ensuring the safety of aircraft operations. The 1998 Regulations were enacted to provide a comprehensive framework for the regulation of civil aviation in Australia, addressing gaps in safety oversight and ensuring compliance with international aviation safety standards. This legislative instrument specifically addresses the issue of steering actuator failures in the British Aerospace BAe 3100 (Jetstream) series aeroplanes, by mandating the replacement of the nose landing gear steering actuator to correct the unsafe condition identified. The policy objective is to enhance the safety of aircraft by requiring specific maintenance actions to prevent potential failures that could compromise the integrity of the aircraft's steering system. The Airworthiness Directive AD/JETSTREAM/88, issued under the authority of the Civil Aviation Regulations 1998, is an example of the measures implemented to address identified safety issues. This directive applies to all British Aerospace Regional Aircraft HP137 Mk 1 Jetstream Series 200, 3100, and 3200 aircraft and requires the replacement of the nose landing gear steering actuator within 3000 landings after the effective date of the directive, but no later than 30 October 2001. This action was taken in response to reported failures at the undercut on the base of the eye end thread of the nose landing gear steering jack, with the aim of improving the reliability and safety of the aircraft's steering system.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, under the authority of the Civil Aviation Safety Authority (CASA), mandates airworthiness directives for maintaining aircraft safety. One such directive, AD/JETSTREAM/88, applies to all British Aerospace Regional Aircraft HP137 Mk 1 Jetstream Series 200, 3100, and 3200 aircraft. This directive requires the replacement of the nose landing gear steering actuator to address reported failures at the undercut on the base of the eye end thread of the nose landing gear steering jack. The directive, effective from 10 August 2000, mandates compliance within 3,000 landings after the directive's effective date, but no later than 30 October 2001. The directive references British Aerospace Service Bulletin 32-JA000342 dated May 5, 2000, and UK CAA AD 004-05-2000, providing the necessary instructions for the replacement to ensure the aircraft's continued safe operation. This AD is part of the broader regulatory framework ensuring that civil aviation safety standards are met across the Commonwealth of Australia.

Key Provisions

The key operative sections of this Airworthiness Directive (AD) are the applicability, requirement, and compliance sections. The applicability section (a) specifies that the directive applies to all British Aerospace Regional Aircraft HP137 Mk 1 Jetstream Series 200, 3100 and 3200 series aircraft. This means that every aircraft of the specified models must comply with the directive's requirements. The requirement section (b) mandates that the nose landing gear steering actuator be replaced in accordance with the Accomplishment Instructions in British Aerospace Service Bulletin 32-JA000342 dated May 5, 2000. This specifies the action that must be taken to address the identified safety issue. The compliance section (c) sets the timeframe for completing the required action, which must be done within 3000 landings after the effective date of the directive, but no later than 30 October 2001. The obligations imposed by this AD are stringent and clear. Operators of the affected aircraft must ensure that the specified action is taken as required. This includes replacing the nose landing gear steering actuator as per the detailed instructions provided in the referenced service bulletin. Operators must also keep meticulous records of the aircraft's landings to ensure compliance within the stipulated timeframe. Failure to comply with these obligations can result in the aircraft being deemed unairworthy, which could lead to operational grounding and potential legal consequences. Breaches of this Airworthiness Directive can lead to serious consequences. The Civil Aviation Safety Authority (CASA) takes non-compliance very seriously, as the directive is issued to address a specific safety concern. Operators who fail to comply with the AD may face enforcement actions, including fines, operational restrictions, or even the suspension of their Air Operator Certificate. The maximum penalties for such breaches are not explicitly stated in the AD but are generally severe, reflecting the importance of maintaining airworthiness standards to ensure public safety.