COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Avro Anson and Avro 19 Series Aeroplanes
AD/ANSON/9 Engine Mount - Inspection 7/50
Applicability: Anson.
Requirement: Inspect the left and right hand engine mounting support frames in accordance with the following:
- Check for bowing in the open face of the frame between the undercarriage torque tube attachment and the top face of the frame (see Point ‘A’ on Fig. 1 of this AD). The permissible limit of bowing between these points is .125 inch.
2. Check for bowing between any pair of distance pieces on the open face of the frame (see Point ‘B’ on Fig. 1 of this AD). The permissible limit of bowing between these points is .0625 inch.
3. Take the following action where limits prescribed in paras. 1 and 2 of this AD are exceeded:
(a) Remove the existing hollow rivets and distance pieces.
(b) Press out the bow on the frame flanges.
(c) Refit new distance pieces of the correct length and replace the hollow rivets by 1/4 in. BSF mild steel bolts.
(d) Lock the nuts by filing back the bolt and centre popping.
4. Bowing on the rear face of the frame at the spar attachment is due to the unmachined finish of the frame and can be ignored; or
ANO Part 100 Appendix ‘A’ Notice No. 9/1; or ANO 105.1.31.4.6.1.
Compliance: Forthwith.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, establish a comprehensive framework to ensure the safety and efficiency of civil aviation within the country. One particular aspect of these regulations is addressed in Part 39 - 105, which includes the Civil Aviation Safety Authority's Schedule of Airworthiness Directives. This legislation was introduced to fill a critical gap in maintaining the structural integrity and operational safety of specific aircraft types, particularly the Avro Anson and Avro 19 Series aeroplanes. The policy objective underpinning this regulation is to mandate stringent inspection and maintenance procedures for specific components of these aircraft, ensuring they remain airworthy and compliant with safety standards. This directive, specifically AD/ANSON/9, focuses on the inspection and necessary corrective actions for the engine mount of the Avro Anson aircraft, aiming to prevent potential structural failures that could compromise flight safety.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, pertains to the maintenance and inspection of Avro Anson and Avro 19 Series Aeroplanes. This legislation applies directly to all operators of these specific aircraft models, ensuring compliance with the outlined airworthiness directives. The scope of this Act is geographically extensive, as it applies nationally within Australia, governed by the Commonwealth's civil aviation authority. The Act mandates specific actions for the inspection and maintenance of engine mount support frames, detailing permissible limits for bowing and corrective measures where these limits are exceeded. The directive also exempts certain bowing on the rear face of the frame at the spar attachment from inspection, due to the unmachined finish of the frame. The legislation extends its reach through subordinate instruments such as the Aeronautical Notice (ANO) Part 100 Appendix ‘A’ Notice No. 9/1, and ANO 105.1.31.4.6.1, which further clarify and enforce the requirements stipulated in the primary regulation.
Key Provisions
The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives for the Avro Anson and Avro 19 Series Aeroplanes, detail the requirements for the inspection and maintenance of the engine mounting support frames (section 7/50). The regulation mandates a thorough inspection of the left and right engine mounting support frames to check for any bowing, with specific permissible limits provided. If the permissible limits of bowing are exceeded, the directive stipulates that corrective actions must be taken, including removing existing rivets and distance pieces, pressing out the bow on the frame flanges, and refitting new distance pieces and bolts (section 7/50). The rear face of the frame at the spar attachment can have bowing due to the unmachined finish, which is permissible and can be ignored.
The obligations imposed by this Act on the parties or entities it governs are clear and precise. Operators of Avro Anson and Avro 19 Series Aeroplanes must ensure that the inspections are carried out forthwith, as stated in the compliance section. The inspections must be meticulous, checking for any bowing in the specified areas and ensuring that any corrective actions are implemented if the limits are exceeded. The operators must adhere to the detailed corrective actions provided, which include the removal and replacement of specific components, and the use of certain types of bolts and nuts. Failure to comply with these directives could result in the aircraft being deemed unairworthy.
Any breach of these Civil Aviation Regulations 1998 could lead to serious consequences. The Act does not explicitly state the penalties or consequences for non-compliance within the text provided, but under general civil aviation law, failure to adhere to Airworthiness Directives can result in severe penalties. This could include fines, suspension or revocation of air operator certificates, and criminal charges for individuals found to be in violation. The maximum penalties for such offences could vary but are generally significant, reflecting the critical nature of maintaining airworthiness in aviation operations.