AD/BEA 121/26 - Rudder Control Tube Bolt

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA) to ensure the safety of civil aviation within Australia. One such directive, AD/BEA 121/26, pertains to Beagle B121 (Pup) Series Aeroplanes and addresses the issue of the rudder control tube bolt. This directive was introduced to address a safety concern where certain rudder and elevator control settings could cause the bolt to foul the elevator control tube, potentially leading to restricted or jammed control movement. The directive applies to all models of the Beagle B121 (Pup) Series and requires compliance with British Aerospace Alert SB B121/94, mandating actions prior to further flight after 27 July 1988 and at each removal or replacement of the specified bolt. The overarching objective is to mitigate risks associated with compromised control mechanisms, thereby enhancing aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all entities and persons involved in the operation of Beagle B121 (Pup) series aeroplanes, encompassing the entire Commonwealth of Australia. The legislation mandates adherence to the Airworthiness Directive AD/BEA 121/26, which was issued on 10 August 1988 and pertains to the rudder control tube bolt. This directive requires action in accordance with the British Aerospace Alert SB B121/94, necessitating compliance prior to further flight after 27 July 1988 and at each instance of removal or replacement of the specified bolt. The legislation's aim is to prevent the bolt from fouling the elevator control tube, which can occur under certain combinations of rudder and elevator control settings, thus avoiding the restriction or jamming of control movement. The regulations extend their reach to all models of the Beagle B121 series aeroplanes operating within the national jurisdiction of Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates airworthiness directives through the Civil Aviation Safety Authority (CASA) for various aircraft types, including the Beagle B121 (Pup) Series Aeroplanes. One such directive is AD/BEA 121/26, which addresses the rudder control tube bolt. According to section (10/88 DM), the directive applies to all models of the Beagle B121 (Pup) Series Aeroplanes. The requirement outlined in section (1) mandates that actions must be taken in accordance with British Aerospace Alert SB B121/94. This directive necessitates compliance prior to further flight after 27 July 1988 and at each subsequent removal or replacement of the subject bolt, as detailed in section (2). The Civil Aviation Regulations impose specific obligations on the parties and entities governed by these directives. Operators and owners of Beagle B121 (Pup) Series Aeroplanes must ensure that the rudder control tube bolt is inspected, maintained, and, if necessary, replaced in accordance with the British Aerospace Alert SB B121/94. This includes conducting these actions before the aircraft takes flight after 27 July 1988 and at each instance the bolt is removed or replaced. Section (3) of the directive highlights the importance of these procedures to prevent potential fouling of the elevator control tube, which could restrict or jam control movement. Failure to comply with the requirements set out in AD/BEA 121/26 may result in civil and criminal consequences. Under section (4), operators who do not adhere to the specified maintenance and inspection procedures could face penalties. The exact nature of these penalties is not detailed in the directive, but it is implied that non-compliance could lead to enforcement actions by CASA, potentially including fines, grounding of the aircraft, or other regulatory sanctions. It is essential for operators to strictly follow the directive to avoid these potential consequences.