AD/DHA-3/13 - Horizontal Tailplane Attachments - Inspection

Overview

The Civil Aviation Regulations 1998, as amended by F2006B08969, were introduced to ensure the highest standards of safety and operational integrity within the Australian civil aviation sector. This legislative instrument, issued by the Australian Government, targets specific maintenance and inspection requirements for certain aircraft models to mitigate the risk of structural failure. The problem it addresses is the potential for critical structural damage in the horizontal tailplane attachments of DHA-3 (Drover) series aeroplanes, which could compromise flight safety if left unchecked. The overarching policy objective is to safeguard the lives of passengers and crew by enforcing rigorous and regular inspections of these vital components, thereby preventing in-flight incidents and maintaining the reliability of the aircraft fleet. This legislative instrument mandates that inspections of the horizontal tailplane rear spar for any signs of cracking near the spar to fuselage attachment brackets must be conducted using approved methods, ensuring thorough and reliable assessments. The requirement for compliance with these inspections at intervals not exceeding 100 hours of operational time underscores the commitment to proactive safety measures. The authority vested in the Secretary to approve necessary repairs further reinforces the regulatory framework's intent to uphold stringent safety standards, ensuring that any detected issues are addressed promptly and effectively.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives DHA-3 (Drover) Series Aeroplanes AD/DHA-3/13, pertains to all models of Drover series aeroplanes not modified in accordance with DH Mod. DRO 92, Issue 2. The directive mandates that the horizontal tailplane rear spar must be inspected for any signs of cracking in the vicinity of the spar to fuselage attachment brackets. This inspection must be conducted using an approved penetrant method or a 10 power magnifying glass. If any cracking is detected, the aeroplane must be repaired to the satisfaction of the Secretary before it is allowed to fly again. Compliance with this directive requires inspections at intervals not exceeding 100 hours of time in service. This regulation applies across the Commonwealth of Australia, governed by the Civil Aviation Safety Authority, and no exclusions or exemptions are explicitly stated within the text of the regulation itself. However, further details or modifications to its application may be found in subordinate instruments or specific administrative notices.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 - 105, mandate specific safety directives for the DHA-3 (Drover) Series Aeroplanes, under the authority of the Civil Aviation Safety Authority (CASA). Specifically, AD/DHA-3/13 outlines the requirements for inspecting the horizontal tailplane rear spar to ensure its integrity and safety. Section 7/56 applies to all models of the DHA-3 series that have not been modified in accordance with DH Mod. DRO 92, Issue 2. This directive necessitates a thorough inspection of the horizontal tailplane rear spar for any signs of cracking, especially in the area where it attaches to the fuselage brackets. This inspection must be conducted using an approved penetrant method or a magnifying glass with at least 10 power magnification to ensure accuracy and reliability. The obligations imposed by these regulations are clear and specific. Operators of the DHA-3 series aeroplanes must ensure that these inspections are carried out meticulously and at regular intervals, not exceeding 100 hours of time in service. If any cracking is detected during the inspection, the aeroplane must be repaired to the satisfaction of the Secretary before it can be flown again. This requirement underscores the importance of maintaining the structural integrity of the aeroplane to ensure safe operations. It is also essential that these inspections are documented properly, as CASA may require evidence of compliance during audits or inspections. Breach of these safety directives can have significant consequences. According to the Australian Civil Aviation Regulations, failure to adhere to the specified inspection and repair requirements can result in serious safety hazards, potentially leading to catastrophic failures during flight. The regulations stipulate that such breaches may lead to enforcement actions, including fines and potential grounding of the aircraft until compliance is achieved. The exact penalties for non-compliance are not detailed in the text, but typically, the Civil Aviation Act 1988 provides for substantial penalties for violations of safety regulations, which may include significant fines and even imprisonment for more severe breaches. It is crucial for operators to understand and adhere to these regulations to avoid these potential penalties and ensure the safety of all passengers and crew.