AD/DHC-2/15 Amdt 1 - Main Undercarriage Lower Forward Bolt Attachment - Inspection

Overview

The Civil Aviation Regulations 1998, a legislative instrument issued by the Parliament of the Commonwealth of Australia, govern civil aviation safety within Australia. Part 39, specifically focusing on Airworthiness Directives, aims to ensure that aircraft maintain a high standard of airworthiness to safeguard against risks to safety. One such directive is AD/DHC-2/15 Amendment 1, which applies to all models of DHC-2 (Beaver) series aeroplanes. This amendment targets the inspection of main undercarriage lower forward attachment bolts for cracking, ensuring that these critical components are regularly assessed for integrity. The policy objective is to mitigate the risk of in-flight failure by mandating specific inspection procedures and intervals, thereby enhancing overall aviation safety. This directive was introduced to address the specific issue of bolt cracking in the main undercarriage, which could potentially compromise the structural integrity of the aircraft. By requiring magnetic particle inspection or fluorescent penetrant inspection for certain parts, the regulation aims to detect and address potential failures before they occur. The differing inspection intervals between agricultural and non-agricultural operations reflect the varying stress levels these aircraft endure, ensuring that maintenance schedules are appropriately tailored to the operational context.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, focusing on DHC-2 (Beaver) Series Aeroplanes. This legislative instrument applies to all models of DHC-2 Beaver aeroplanes, encompassing both private and commercial aircraft within the Commonwealth of Australia. Its scope is defined by the requirement to inspect the main undercarriage lower forward attachment bolts for any signs of cracking, with different inspection intervals based on the aircraft’s operational context. Agricultural aircraft must undergo inspections at intervals not exceeding 100 hours of time in service, while other aircraft are subject to inspections at intervals not exceeding 500 hours of time in service. The inspections must be performed using magnetic particle inspection in accordance with ANO 108.8 for specific parts or fluorescent penetrant inspection as per ANO 108.10 for other parts. The regulations are enforced across the Commonwealth, and compliance is mandatory for all entities operating DHC-2 Beaver aeroplanes within Australia.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1998, particularly in relation to AD/DHC-2/15 Amendment 1, mandate specific inspections for the main undercarriage lower forward bolt attachments on DHC-2 (Beaver) series aeroplanes (section 39-105). The regulation requires inspections for cracking on certain parts, namely P/N C2U-487ND and P/N 02-B-16. For P/N C2U-487ND, inspections must be performed using either magnetic particle inspection in accordance with ANO 108.8 or fluorescent penetrant inspection in accordance with ANO 108.10. Similarly, P/N 02-B-16, which refers to hard chrome plated bolts, must also undergo fluorescent penetrant inspection in accordance with ANO 108.10. The inspections are required at different intervals depending on the aircraft's operational context: every 100 hours for aircraft engaged in agricultural operations and every 500 hours for other aircraft. The obligations imposed by this regulation are primarily on the operators of DHC-2 (Beaver) series aeroplanes. They must ensure that the specified inspections are conducted at the prescribed intervals, using the appropriate inspection methods. Operators must maintain records of these inspections and ensure that any identified issues are addressed in accordance with the applicable airworthiness directives and maintenance protocols. This ensures that the aircraft remain airworthy and safe for operation. Failure to comply with the inspection requirements outlined in the Civil Aviation Regulations 1998 may result in serious consequences. While specific offences and penalties are not detailed in this particular directive, non-compliance with airworthiness directives generally can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). These actions may include the issuance of a Notice of Proposed Civil Penalty, the imposition of fines, and in severe cases, the suspension or revocation of the aircraft's certificate of airworthiness. Additionally, non-compliance could potentially lead to criminal charges if the failure to adhere to the regulations results in an accident or serious incident, exposing operators to both civil and criminal liabilities.