AD/JETSTREAM/84 - Nose Landing Gear (NLG) - Inspection of Steering Jack

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia's Parliament, establish a comprehensive regulatory framework governing all aspects of civil aviation within Australia. Specifically, Part 39 - 105 of these regulations includes the Schedule of Airworthiness Directives, which serve to ensure the safety and airworthiness of aircraft operating under Australian jurisdiction. One such directive, AD/JETSTREAM/84, was introduced to address the specific issue of cracking at the base of the thread in the steering jack piston rod of British Aerospace Jetstream Series aeroplanes. The policy objective is to enhance aviation safety by mandating inspections and maintenance actions to prevent the failure of critical components such as the steering jack, thereby reducing the risk of in-flight incidents. The Airworthiness Directive AD/JETSTREAM/84 mandates a thorough inspection and maintenance of the steering jack pivot points in certain Jetstream Series aircraft to ensure proper assembly and lubrication, aiming to prevent potential catastrophic failures. Compliance with this directive is required by 30 October 1999, following its effective date of 17 June 1999. This directive is a direct response to reported incidents where inadequate maintenance practices led to structural failures, underscoring the importance of stringent regulatory oversight in maintaining the highest safety standards in civil aviation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the maintenance and safety of aircraft, including the British Aerospace BAe 3100 (Jetstream) series aeroplanes. The legislation mandates specific airworthiness directives for these aircraft, such as the directive regarding the nose landing gear (NLG) steering jack inspection. This particular directive applies to all Jetstream Series 200, 3100, and 3200 aircraft equipped with designated NLG units. The directive is effective as of 17 June 1999, with compliance required by 30 October 1999, mandating that the maintenance actions specified in Jetstream Service Bulletin 32-JA 981043 be performed. This directive is crucial to address incidents of cracking at the base of the steering jack piston rod, which can arise from incorrect assembly or inadequate lubrication of the steering jack pivot points, potentially leading to significant operational risks. The directive is applicable on a national level, ensuring that all relevant aircraft operators within Australia adhere to the stipulated safety requirements.

Key Provisions

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, establish the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. One such directive, AD/JETSTREAM/84, pertains to the nose landing gear (NLG) inspection of the steering jack on British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This directive applies to all Jetstream Series 200, 3100, and 3200 series aircraft equipped with certain nose landing gear units (1873; B00A702852A; B00A703064A; B00A703056A) (s.1). The directive mandates the performance of maintenance actions as detailed in Jetstream Service Bulletin 32-JA 981043 dated 05 March 1999 and the associated APPH Precision Hydraulics Service Newsletter (s.2). It is noteworthy that Jetstream MSB 32-JA 981043 is classified as a UK CAA Mandatory directive, indicating its importance and urgency. The directive imposes specific obligations on the operators and maintenance personnel of affected aircraft. They must ensure that the inspection and necessary maintenance actions are carried out according to the guidelines provided in the Jetstream Service Bulletin and the APPH Precision Hydraulics Service Newsletter. These actions are critical to verify the correct assembly and lubrication of the steering jack pivot points, aiming to prevent cracking at the base of the steering jack piston rod, which could otherwise lead to a breakdown of the steering jack piston rod (s.3). Compliance with this directive must be achieved by 30 October 1999, ensuring that the maintenance is completed well before this date (s.4). Failure to comply with the requirements set out in AD/JETSTREAM/84 can have significant consequences. The directive establishes that non-compliance is an offence under the Civil Aviation Act 1988. Specifically, operators and maintenance personnel who fail to perform the required inspections and maintenance actions on the specified date may face civil penalties. The maximum penalty for a breach of these regulations can be substantial, reflecting the critical nature of maintaining the airworthiness of aircraft. The specific penalties and enforcement actions are detailed in the Civil Aviation Regulations and the Civil Aviation Act 1988, ensuring that compliance is rigorously enforced to maintain the highest safety standards in civil aviation.