Airworthiness Directives 2004
I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety
Authority, acting under subregulation 39.001 (1) of the Civil
Aviation Safety Regulations 1998:
(a) revoke the Airworthiness Directives mentioned in
Schedule 1; and
(b) make, as separate instruments, each Airworthiness
Directive mentioned in Schedule 1 and attached.
David Villiers
Delegate of the Civil Aviation Safety Authority
20 December 2004
Note: Each attached Airworthiness Directive is being re-made in exactly the
same form as appears in the latest published edition of the Directive.
Schedule 1 Revocation and Remaking of
Airworthiness Directives
Ayres Thrush (Snow) Commander Series Aeroplanes
AD Name AD Number
Mixture Control Lever Quadrant - Modification AD/AC-SNOW/1
Agricultural Equipment Boom Support - Modification AD/AC-SNOW/2
Main Landing Gear Axle - Inspection and Modification AD/AC-SNOW/3
Deflector Cable Assembly - Modification AD/AC-SNOW/4
Fin Bracing Wire Fittings - Modification AD/AC-SNOW/5
Turn and Bank Indicator Installation - Modification AD/AC-SNOW/6
Seat Installation - Reinforcement - CANCELLED AD/AC-SNOW/7 Amdt 2
Installation of Padding to Cockpit Upper Cross Tube - Modification AD/AC-SNOW/8
Seat Travel Restriction - Modification AD/AC-SNOW/9
Safety Harness - Installation AD/AC-SNOW/10
Carburettor Air Selector Valve Assembly - Inspection AD/AC-SNOW/11
Rudder Control Surface Upper Hinge - Inspection and Modification AD/AC-SNOW/12
Horizontal Stabiliser Spar - Fatigue Inspection AD/AC-SNOW/13
Wing Spar and Wing Attachments AD/AC-SNOW/14 Amdt 4
Forward Fuselage Upper Longerons - Inspection and Modification AD/AC-SNOW/15
Rudder Horn Balance/Leading Edge Intersection AD/AC-SNOW/16 Amdt 1
Outer Wing Huck Bolts AD/AC-SNOW/17
Wing Front Spar Corrosion AD/AC-SNOW/18
Aileron Hinge Brackets - CANCELLED AD/AC-SNOW/19
Aileron Hinge Bracket Bolts AD/AC-SNOW/20
Vertical Tail Attachment Bracket AD/AC-SNOW/21
Horizontal Stabiliser Front and Rear Spar and Attach Fittings AD/AC-SNOW/22
Vertical Fin Rear Spar AD/AC-SNOW/23
Wing Spar AD/AC-SNOW/24 Amdt 3
MLG to Fuselage Attach Bolts AD/AC-SNOW/25
Overview
The Airworthiness Directives 2004, enacted by the Civil Aviation Safety Authority under the authority of the Civil Aviation Safety Regulations 1998, serves to update and reissue a series of Airworthiness Directives concerning specific modifications and inspections for Ayres Thrush (Snow) Commander Series Aeroplanes. This legislative instrument was introduced to address the need for the continuous updating and re-issuance of airworthiness directives to ensure compliance with the latest safety standards and technological advancements in aviation. The directives cover a range of modifications and inspections necessary to maintain the airworthiness of these aircraft, ensuring they meet current safety requirements. The enactment of this instrument by the Civil Aviation Safety Authority aims to maintain and enhance the safety and reliability of Australian civil aviation operations.
Scope and Application
The Airworthiness Directives 2004, as made by David Alan Villiers, delegate of the Civil Aviation Safety Authority (CASA), pertain specifically to the aeronautical industry and the specific airworthiness requirements of certain aircraft models. These directives apply to the operators and owners of Ayres Thrush (Snow) Commander Series Aeroplanes and mandate compliance with the detailed modifications and inspections outlined in each individual Airworthiness Directive. This legislation impacts the maintenance and operational standards for these aircraft, ensuring that they meet the necessary safety benchmarks set forth by the Civil Aviation Safety Regulations 1998. The scope of these directives is comprehensive, covering aspects such as structural modifications, component inspections, and installation of safety equipment, all of which are critical for the continued airworthiness of the specified aircraft. The application of these directives is national, extending across all states and territories within Australia, and they are enforceable under the regulatory framework established by the Civil Aviation Safety Regulations 1998. While the primary focus is on the specified aircraft, the directives do not explicitly exclude other aircraft types or operations, although their applicability would depend on the specific circumstances and the aircraft in question. The re-making of these directives ensures that they remain current and aligned with the latest safety standards and technological advancements.
Key Provisions
The Airworthiness Directives 2004, issued under the authority of the Civil Aviation Safety Regulations 1998, primarily serve to revoke and remake a series of airworthiness directives (AD) for the Ayres Thrush (Snow) Commander series aeroplanes (sections 1(a) and 1(b)). The specific ADs affected are listed in Schedule 1, which includes modifications, inspections, and reinforcements for various parts of the aircraft, such as the mixture control lever quadrant, agricultural equipment boom support, and main landing gear axle, among others. Each directive is re-made in the same form as the latest published edition to ensure consistency and accuracy in safety standards.
The obligations imposed by these directives on parties such as aircraft manufacturers, operators, and maintenance providers are comprehensive. They must ensure that all specified modifications, inspections, and reinforcements are completed according to the detailed instructions provided in each directive. For instance, manufacturers and maintenance providers must follow the prescribed procedures for modifying the mixture control lever quadrant or inspecting the rudder control surface upper hinge. Aircraft operators must ensure their aircraft meet the airworthiness standards outlined in the directives before continuing operations. Compliance with these directives is essential to maintain the safety and airworthiness of the affected aircraft.
Failure to comply with the provisions of these airworthiness directives can result in significant legal consequences. The Civil Aviation Safety Regulations 1998, under which these directives are issued, provide for both civil and criminal penalties for non-compliance. Civil penalties may include fines up to a specified amount, depending on the severity and nature of the breach. Criminal penalties can be imposed for more serious violations, which may include imprisonment or substantial fines. The specific penalties are outlined in the regulations, and non-compliance can also lead to the grounding of non-compliant aircraft, affecting operational continuity and potentially resulting in significant financial losses for operators.