COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Cirrus Design SR20 and SR22 Series Aeroplanes
AD/CIRRUS/3 Roll and Yaw Trim Cartridges Self-Locking Nuts
13/2002
DM
Applicability: Model SR20, serial numbers 1005 through 1241, except 1235, 1237, and 1238.
Model SR22, serial numbers 0002 through 0333, except 0309, 0322, 0323, and 0328.
Requirement: Replace the self- locking retaining nut on the yaw trim cartridge and the roll trim cartridge with a new self- locking retaining nut, MS21044N3.
Note: FAA AD 2002-21-02 Amdt 39-12908 refers.
Compliance: Within 10 hours time in service after 8 November 2002.
This Airworthiness Directive becomes effective on 30 October 2002.
Background: The FAA received a report that, during flight test, the self- locking retaining nut on the yaw trim cartridge came off, and the pilot lost right rudder control. This Directive requires retaining nut replacement on both roll and yaw trim cartridges with new self- locking nuts with a higher axial load capability. Loss of a retaining nut during flight could result in jamming of corresponding flight control system, and loss of control of the aircraft.
David Alan Villiers
Delegate of the Civil Aviation Safety Authority 24 October 2002
The above AD is notified in the Commonwealth of Australia Gazette on 30 October 2002.
Overview
The Civil Aviation Regulations 1998, as amended, form a significant part of Australia's regulatory framework for civil aviation. These regulations, enacted by the Parliament of Australia, aim to ensure the safety and efficiency of civil aviation operations within the country. One of the specific legislative instruments under these regulations is the Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA). The purpose of this directive is to address identified safety issues in specific aircraft models by mandating corrective actions to rectify unsafe conditions. For instance, Airworthiness Directive AD/CIRRUS/3, issued on 24 October 2002, addresses a critical issue with the self-locking retaining nuts on the roll and yaw trim cartridges of certain Cirrus Design SR20 and SR22 Series aeroplanes, aiming to prevent potential loss of control during flight. This directive was introduced to mitigate risks associated with the detachment of these nuts, which could lead to jamming of the flight control system.
Scope and Application
This Airworthiness Directive (AD) applies specifically to the Cirrus Design SR20 and SR22 Series Aeroplanes, detailing the necessary action to be taken regarding the yaw trim cartridge and roll trim cartridge self-locking nuts. The directive applies to SR20 models with serial numbers ranging from 1005 through 1241, with specific exceptions of serial numbers 1235, 1237, and 1238, and to SR22 models with serial numbers from 0002 through 0333, excluding 0309, 0322, 0323, and 0328. The directive mandates the replacement of the self-locking retaining nut on both the yaw trim cartridge and the roll trim cartridge with a new self-locking retaining nut, specifically MS21044N3, to address a safety issue identified during flight testing where the self-locking nut on the yaw trim cartridge came off, resulting in the loss of right rudder control. This action is required within 10 hours of time in service after 8 November 2002, and the AD becomes effective on 30 October 2002. The directive extends the authority of the Civil Aviation Safety Authority (CASA) to ensure the safety and airworthiness of the specified aircraft models within Australia's jurisdiction.
Key Provisions
The Civil Aviation Regulations 1998, specifically under Part 39, section 105, establishes a schedule of Airworthiness Directives that must be adhered to by certain aircraft and aeronautical products. This Airworthiness Directive (AD), issued by the Civil Aviation Safety Authority (CASA), applies to Cirrus Design SR20 and SR22 series aeroplanes. The directive (AD/CIRRUS/3) mandates that specific actions be taken to rectify identified unsafe conditions. The applicable aircraft are the SR20 model with serial numbers ranging from 1005 to 1241, excluding 1235, 1237, and 1238, and the SR22 model with serial numbers from 0002 to 0333, excluding 0309, 0322, 0323, and 0328.
The main requirement of this directive is the replacement of the self-locking retaining nut on both the yaw trim cartridge and the roll trim cartridge with a new self-locking retaining nut, specifically MS21044N3. This directive refers to FAA AD 2002-21-02 Amdt 39-12908, indicating alignment with international safety standards. The action must be completed within 10 hours of time in service after 8 November 2002. The directive became effective on 30 October 2002, as notified in the Commonwealth of Australia Gazette.
The obligations imposed by this directive are clear and specific. Owners and operators of the affected aircraft must ensure that the replacement of the retaining nuts is carried out within the stipulated timeframe. This involves sourcing the correct replacement part, MS21044N3, and having the work performed by certified personnel. The directive necessitates adherence to the instructions provided, ensuring that the replacement is done correctly to avoid compromising the aircraft's safety.
Failure to comply with the requirements of this Airworthiness Directive could result in serious safety hazards. The background information indicates that a loss of the retaining nut during flight could lead to jamming of the corresponding flight control system and subsequent loss of control of the aircraft. While the specific civil or criminal penalties for non-compliance are not detailed in the directive, failure to adhere to Airworthiness Directives can result in significant regulatory consequences, including potential grounding of the aircraft, fines, and other enforcement actions by CASA. These measures are in place to ensure that all aircraft meet the necessary safety standards and to prevent any risks that could endanger flight operations.