AD/CL-600/25 Amdt 1 - Throttle Quadrant

Overview

The Civil Aviation Regulations 1998 (Cth) were enacted to establish a comprehensive regulatory framework for ensuring civil aviation safety in Australia. Part 39, specifically, addresses airworthiness directives to maintain the safety standards of aircraft operating within Australia's airspace. The Civil Aviation Safety Authority Schedule of Airworthiness Directives, including AD/CL-600/25 Amendment 1, targets the Bombardier (Canadair) CL-600 (Challenger) series aeroplanes to address a specific problem: unintentional engine shut-downs during flight due to the throttle lever overriding the idle stop. This issue was identified following a reported incident where the throttle lever moved into the shut-off position during throttle retardation. The amendment, introduced by the Civil Aviation Safety Authority, aims to comply with Transport Canada's technical requirements, as detailed in AD CF-92-23R1, to rectify this safety concern and ensure the continued airworthiness of the affected aircraft models. The policy objective behind AD/CL-600/25 Amendment 1 is to enhance flight safety by implementing necessary modifications to the aircraft throttle quadrant, as specified in the Requirement Document, with an effective date of 23 June 1994. This legislative instrument is a response to the reported incident and aims to prevent similar occurrences by mandating the additional fault detection check and throttle quadrant modifications. The directive applies to CL-600 aircraft with specific serial numbers and throttle quadrant part numbers, ensuring that all affected aircraft comply with the updated safety standards to maintain operational safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, pertains to the Civil Aviation Safety Authority's Schedule of Airworthiness Directives for Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes, with AD/CL-600/25 Amendment 1 focusing on the throttle quadrant. This legislation applies to the CL-600 aircraft models with specific serial numbers and corresponding throttle quadrant part numbers outlined in the Requirement Document. The directive mandates compliance with technical requirements as specified by Transport Canada AD CF-92-23R1, addressing reports of unintentional engine shut-downs during flight due to the throttle lever overriding the idle stop and moving into the shut-off position. The directive is rooted in Canadian Safety Bulletins and Advisories, namely Canadair Challenger ASB A600-0615, ASB A601-0374 Revision 1, SB 600-0629, and SB 601-0410. Compliance with these directives is crucial, as stipulated in the Requirement Document, with an effective date of 23 June 1994. This regulation underscores the importance of implementing corrective actions to prevent potential safety hazards associated with the aircraft's throttle system.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 - 105, addresses the safety directives that must be adhered to by certain aircraft models, including the Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes (section 39-105). Specifically, Amendment 1 (AD/CL-600/25) pertains to the throttle quadrant, and it requires compliance with the technical requirements outlined in Transport Canada AD CF-92-23R1. This amendment applies to CL-600 aircraft with specific serial numbers and throttle quadrant part numbers, as detailed in the Requirement Document. Compliance with this directive is mandatory and must be carried out as specified in the Requirement Document, with a revised effective date of 23 June 1994. The obligations imposed by this Act are quite clear. Operators of the affected aircraft must ensure that the modifications and fault detection checks are implemented as specified in the Requirement Document. This includes adhering to the technical requirements outlined in Transport Canada AD CF-92-23R1, which aims to address the issue of unintentional engine shut-downs that have been reported in flight due to the throttle lever overriding the idle stop during throttle retardation. Failure to comply with these directives could potentially result in significant safety risks and operational issues. Furthermore, the Act mandates that these modifications be completed by certified technicians who are knowledgeable about the specific requirements and procedures outlined in the Requirement Document. This ensures that the aircraft meets the necessary safety standards and can operate without the risk of unintended engine shut-downs. The directive also references specific bulletins and service letters, such as Canadair Challenger ASB A600-0615, ASB A601-0374 Revision 1, SB 600-0629, and SB 601-0410, which provide further guidance and detail on the required actions. In terms of consequences for non-compliance, the Civil Aviation Regulations 1998 impose penalties and other legal ramifications. Failure to adhere to the airworthiness directives can result in serious safety issues, potentially leading to accidents or incidents that could endanger lives. Legally, operators may face penalties, including fines, and the aircraft may be grounded until the required modifications are made. The severity of the penalties is intended to ensure that all parties comply with the safety directives to maintain the highest standards of aviation safety.