COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Transavia PL 12 Series Aeroplanes
AD/PL 12/13 Nose Wheel Pivot Assembly - Inspection 9/73
Applicability: All models.
Requirement: 1. Remove nose wheel pivot pin P/N 6-24 and detach nose wheel leg pivot assembly P/N 6-202.
2. Remove nose wheel pivot bushes P/N 6-22. Check that the diameter of the internal bore of the bushes is within 0.501" and 0.503" and the diameter of the pivot pin P/N 6-24 is within 0.498" to 0.500".
3. Check parallelism of the facing surfaces of the nose wheel pivot support assemblies. The inner surfaces of the upper and lower support assemblies shall be parallel to within 0.005" over with width of the faces.
4. Assemble the spacer P/N 6-23 and bushes onto the pivot pin and measure the distance between the inside of the flanges of the two bushes. Check that the distance between the bearing caps on the nose wheel pivot leg assembly provides a clearance fit between the flanges of the bushes.
5. Assemble the spacer and bushes in the nose wheel pivot leg assembly, and with the bushes clamped to the spacer, the dimension over the outside of the bushes shall provide a snug push fit between the pivot support assemblies.
6. When the nose wheel is assembled and the pivot pin torqued in accordance with the manufacturers maintenance manual, the nose wheel shall pivot freely. The end play of the nose wheel pivot leg assembly on the pivot bushes shall be a minimum of 0.008" and not more than 0.040".
Note: Only paras. 3 and 6 of requirement document applicable to aircraft incorporating SB No. 27 (incorporated in production from Serial No. G576).
Compliance: Within 100 hours time in service after 12 September 1973 and thereafter at intervals not exceeding 300 hours time in service, and at any time the nose wheel pivot leg assembly is removed.
Overview
The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form a crucial part of the regulatory framework governing civil aviation in Australia. These regulations address the safety standards and operational requirements for all civil aviation activities within Australian territory. The 1998 Regulations, which include Part 39 - 105, aim to ensure that all civil aircraft are maintained to high safety standards to protect the travelling public and enhance the overall safety of the aviation industry. One specific legislative instrument, F2006B06259, pertains to Airworthiness Directives for Transavia PL 12 Series Aeroplanes, addressing the inspection of the nose wheel pivot assembly. This directive was introduced to mitigate risks associated with the structural integrity of the nose wheel pivot assembly, ensuring it meets specific dimensional and functional criteria to maintain safe operational standards. Compliance with these directives is mandatory to ensure the aircraft's continued airworthiness and adherence to safety regulations.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all models of Transavia PL 12 Series aeroplanes and mandates the inspection of the nose wheel pivot assembly as outlined in Airworthiness Directive AD/PL 12/13. This regulation applies to any aircraft operating within the Commonwealth of Australia, governed by the Civil Aviation Safety Authority. The directive requires the removal and detailed inspection of specific components including the nose wheel pivot pin, bushes, and support assemblies, with precise dimensional checks and parallelism requirements. Compliance is mandated within 100 hours after 12 September 1973 and at intervals not exceeding 300 hours thereafter, or whenever the nose wheel pivot leg assembly is removed. This regulation ensures the airworthiness of the aircraft by maintaining the structural integrity and operational safety of the nose wheel pivot assembly.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives for Transavia PL 12 Series Aeroplanes. Within this directive, AD/PL 12/13 mandates the inspection of the nose wheel pivot assembly (Section 9/73). The requirement involves several steps to ensure the structural integrity and functionality of the nose wheel pivot assembly. Firstly, the nose wheel pivot pin P/N 6-24 must be removed, and the nose wheel leg pivot assembly P/N 6-202 detached (Requirement 1). Secondly, the nose wheel pivot bushes P/N 6-22 should be removed and their internal bore diameters checked to ensure they fall within the specified range of 0.501" to 0.503". Similarly, the diameter of the pivot pin P/N 6-24 must be within 0.498" to 0.500" (Requirement 2).
The directive also requires checking the parallelism of the facing surfaces of the nose wheel pivot support assemblies. Specifically, the inner surfaces of the upper and lower support assemblies must be parallel to within 0.005" over the width of the faces (Requirement 3). Furthermore, the spacer P/N 6-23 and bushes must be assembled onto the pivot pin, and the distance between the inside of the flanges of the two bushes checked to ensure a clearance fit (Requirement 4). When reassembling the nose wheel pivot leg assembly with the bushes clamped to the spacer, the dimension over the outside of the bushes should provide a snug push fit between the pivot support assemblies (Requirement 5). Finally, after reassembly and torquing the nose wheel pivot pin in accordance with the manufacturer's maintenance manual, the nose wheel should pivot freely with an end play of the nose wheel pivot leg assembly on the pivot bushes between 0.008" and 0.040" (Requirement 6).
Compliance with these requirements is crucial and must be achieved within 100 hours of time in service after 12 September 1973, and subsequently at intervals not exceeding 300 hours of time in service. Additionally, inspections must be carried out any time the nose wheel pivot leg assembly is removed. The regulations also clarify that certain paragraphs of the requirement document apply only to aircraft incorporating Service Bulletin No. 27, which was incorporated into production from Serial No. G576 onwards.
Failure to comply with these airworthiness directives may lead to significant legal and safety implications. The Civil Aviation Act 1988 and associated regulations can impose penalties for non-compliance, including fines and potential imprisonment. In addition to criminal penalties, operators may face civil penalties for breaches of airworthiness directives, which could include substantial financial penalties and other enforcement actions. Ensuring strict adherence to these directives is therefore not only a regulatory requirement but also a critical safety measure to prevent potential aircraft failures and ensure the safety of all passengers and crew.