AD/BAe 146/28 - Main Landing Gear Lock Jack

Overview

The Civil Aviation Regulations 1998, under Part 39 - 105, establish the Civil Aviation Safety Authority Schedule of Airworthiness Directives, addressing safety concerns for specific aircraft models. One such directive is AD/BAe 146/28 concerning British Aerospace BAe 146 Series aeroplanes. This directive was enacted to tackle a specific safety issue with the main landing gear lock jack of certain BAe 146 aircraft. The problem identified was a manufacturing defect in a batch of lock jack assemblies, leading to the potential failure of the lock jack during operation. The directive applies to all BAe 146 aircraft equipped with a specific Uplock Jack part number and serial numbers as listed in Dowty Rotol SB 146-32-93. The policy objective is to ensure compliance with the mandatory service bulletin, SB 146-32-93 Rev 1, which specifies the necessary corrective actions to mitigate the identified risk. The directive is enforced by the Civil Aviation Safety Authority, a body under the Australian Government responsible for regulating and ensuring safety in civil aviation. The requirement is that the action must be taken in accordance with the specified service bulletin, with reference to additional guidance in BAe146 SB 32-103. Compliance is to be achieved as detailed in the requirement document, ensuring the affected aircraft meet the safety standards to prevent potential in-flight failures.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, which includes directives for maintaining the airworthiness of specific aircraft models. In this instance, the directive AD/BAe 146/28 focuses on British Aerospace BAe 146 Series Aeroplanes and mandates specific actions concerning the Main Landing Gear Lock Jack. The directive applies to all BAe 146 aircraft that have an Uplock Jack part number 104275001 installed, as identified by the serial number listed in Dowty Rotol Service Bulletin 146-32-93. This requirement is critical for ensuring the safety and airworthiness of the affected aircraft, as a defect in the forging of the lock jack bodies has been identified in a batch of these parts. Compliance with the directive is necessary and must be carried out in accordance with the detailed specifications provided in Dowty Rotol Mandatory Service Bulletin 146-32-93 Rev 1, which further references BAe146 Service Bulletin 32-103. The directive underscores the importance of adhering to the detailed requirements set forth in the relevant service bulletins to address the identified safety issue. The directive applies only to the specified BAe 146 aircraft with the particular lock jack part number and serial numbers as identified in the referenced service bulletins. It does not extend to other aircraft types or components unless explicitly stated. The regulation's scope is thus narrowly tailored to address a specific safety concern within the identified batch of aircraft. Compliance is mandatory, and failure to adhere to the directive could result in the affected aircraft being deemed unairworthy until the necessary actions are taken.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes an Airworthiness Directive (AD) for British Aerospace BAe 146 Series aeroplanes, identified as AD/BAe 146/28, which mandates actions related to the Main Landing Gear Lock Jack. This directive applies to all BAe 146 aircraft equipped with an Uplock Jack part number 104275001, and it concerns those with specific serial numbers identified in Dowty Rotol Service Bulletin (SB) 146-32-93. The primary requirement is to take action in accordance with Dowty Rotol Mandatory SB 146-32-93 Rev 1, which provides detailed instructions on how to address the issue. The AD imposes specific obligations on the parties or entities it governs. Aircraft operators and maintenance organisations must ensure that the Main Landing Gear Lock Jack on the specified BAe 146 aircraft is examined and rectified if necessary. This involves following the detailed procedures outlined in Dowty Rotol SB 146-32-93 Rev 1 to verify and correct any defects in the lock jack assembly. Additionally, operators must maintain records of compliance with this directive and ensure that any required modifications or inspections are completed within the stipulated timeframe. Failure to comply with the requirements of AD/BAe 146/28 can lead to various consequences. The Civil Aviation Safety Authority (CASA) may take enforcement action against operators or maintenance providers who do not adhere to the directive. This could result in penalties, which may include fines or other sanctions. The severity of the penalties depends on the extent of non-compliance and the impact on aviation safety. Operators found in breach of this directive may face significant legal and financial repercussions, highlighting the importance of strict adherence to the specified requirements.