AD/DH 104/29 - Engine Mounting Frame - Inspection

Overview

The Civil Aviation Regulations 1998, specifically within Part 39, contains the Airworthiness Directives (AD) aimed at maintaining the safety standards of aircraft in Australian airspace. Enacted by the Australian Government, these regulations address the need to ensure that all civil aircraft are maintained in a condition that is safe for operation. The policy objective behind these directives is to mandate regular inspections and maintenance actions to prevent potential hazards that could compromise the safety of the aircraft and its occupants. The regulations are enforced by the Civil Aviation Safety Authority (CASA), which oversees compliance with these standards to uphold the integrity of Australia's civil aviation safety framework. One example within this framework is AD/DH 104/29, which concerns the inspection of the engine mounting frame of DH 104 (Dove) Series Aeroplanes. This directive, applicable to all models of the Dove series, mandates inspections within 50 hours of time in service after 22 May 1972 and then at intervals not exceeding 75 hours time in service, as outlined in Hawker Siddeley TNS CT(104) No. 228 Issue 1. This specific directive is part of the broader regulatory approach to ensure that the critical components of the aircraft are regularly assessed and maintained to prevent any potential failure that could endanger flight safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all Hawker Siddeley Dove Series Aeroplanes, denoted as DH 104 models. This regulation mandates compliance with Airworthiness Directives, such as AD/DH 104/29, which requires an inspection of the engine mounting frame. The directive applies universally to all models of the Dove series and mandates that inspections must be carried out within 50 hours of time in service after the directive's issuance date of 22 May 1972, and subsequently at intervals not exceeding 75 hours of time in service. This legislation is administered by the Civil Aviation Safety Authority (CASA) and carries nationwide applicability within Australia, ensuring the safety and airworthiness of these aircraft are maintained according to prescribed standards. The scope of this regulation is comprehensive and does not explicitly exclude any specific entity or model from its purview, thereby ensuring uniform safety protocols across the industry.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 105, include Airworthiness Directives (AD) for various aircraft models, including the DH 104 (Dove) Series Aeroplanes. Section AD/DH 104/29 mandates an inspection of the engine mounting frame for all Dove series aircraft models. This requirement is designed to ensure the continued airworthiness of the aircraft and the safety of its operations. The inspection must be conducted within 50 hours of time in service after the directive was issued on 22 May 1972, and then at intervals not exceeding 75 hours of time in service thereafter (AD/DH 104/29). Under the Civil Aviation Regulations 1998, operators of Dove series aeroplanes are required to comply with the Airworthiness Directives, including AD/DH 104/29. This means that they must ensure the engine mounting frame is inspected within the specified timeframes to maintain the aircraft's airworthiness. Operators are responsible for ensuring that the inspections are carried out by qualified personnel, using the specified Hawker Siddeley TNS CT(104) No. 228 Issue 1 document as a guideline. Failure to adhere to these requirements could result in the aircraft being deemed unairworthy, leading to potential grounding and operational disruptions. Breaching the requirements outlined in the Civil Aviation Regulations 1998 can have significant consequences. The Act imposes obligations on aircraft operators to ensure compliance with the specified ADs, and non-compliance can result in civil penalties. Under the Civil Aviation Act 1988, operators who fail to comply with the ADs may face financial penalties up to $222,200 for a corporation and $44,440 for an individual, along with potential criminal charges. The severity of the penalties underscores the importance of adhering to the ADs to ensure the safety and continued airworthiness of the aircraft.