AD/DH114/8 - Centre Section Spar Boom Inspection for Chafing

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aim to regulate and oversee civil aviation within the country. Among its provisions, Part 39 specifically addresses the airworthiness directives, which are essential for maintaining safety standards in the aviation sector. One such directive, AD/DH114/8, pertains to the inspection of centre section spar booms in De Havilland Heron series aeroplanes to prevent chafing. This directive applies to all models that have not been modified according to the specific modification number 604. The objective of this directive is to ensure that the aeroplanes remain airworthy and safe for operation, with compliance required before 31 December 1960 as specified in the relevant documentation, De Havilland TNS Series Heron (114) No. F.10, Issue 2. The Civil Aviation Safety Authority enforces these regulations to uphold the safety and reliability of civil aviation within Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, issued by the Civil Aviation Safety Authority (CASA), mandates compliance with airworthiness directives for aircraft such as the de Havilland Heron Series Aeroplanes. This directive, identified as AD/DH114/8, pertains to the inspection of the centre section spar boom for chafing in all models of the de Havilland Heron series that have not been modified according to DH Heron Modification No. 604. This regulation applies to aircraft registered in Australia and ensures adherence to safety standards by mandating that inspections be conducted before 31 December 1960. The scope of the directive includes all relevant aircraft models, irrespective of their operational use, ensuring that they meet specified safety criteria. While the primary focus is on the centre section spar boom inspection, the broader regulation aims to maintain the airworthiness of the aircraft within the Australian jurisdiction, ensuring that all modifications and inspections comply with CASA's standards.

Key Provisions

The key provision of the Civil Aviation Regulations 1998, specifically within Part 39 - 105, is the Airworthiness Directives (AD) concerning the De Havilland DH114 (Heron) Series Aeroplanes (AD/DH114/8). This directive mandates a specific inspection procedure for the centre section spar boom to check for chafing. This requirement applies to all models of the DH114 series that have not been modified in accordance with De Havilland Heron Modification Number 604. The compliance date for this inspection is set before 31 December 1960, as documented in the De Havilland Technical Notice Series (TNS) for the Heron (114) No. F.10, Issue 2. The AD imposes several obligations on the parties and entities governed by these regulations. Primarily, it mandates that all relevant aeroplanes undergo an inspection of the centre section spar boom for signs of chafing. This inspection must be conducted meticulously and in accordance with the specifications outlined in the referenced technical document. The operators of these aircraft are required to ensure that these inspections are performed by qualified personnel and that any identified issues are addressed promptly and appropriately to maintain the airworthiness of the aircraft. Failure to comply with the provisions outlined in the AD can lead to significant consequences. Although the specific penalties are not detailed within the text, it is understood that breaches of airworthiness directives under the Civil Aviation Regulations 1998 can result in enforcement actions. These actions may include fines, the grounding of the affected aircraft until compliance is achieved, or even the revocation of the aircraft's certificate of airworthiness. Such severe consequences underscore the importance of adhering to these safety directives to ensure the safety and reliability of civil aviation operations. In summary, the Civil Aviation Regulations 1998, through Part 39 - 105, require specific inspections on the DH114 (Heron) Series Aeroplanes to prevent chafing in the centre section spar boom. These regulations impose clear obligations on aircraft operators to conduct these inspections and address any issues found. Non-compliance can lead to serious consequences, including financial penalties and potential grounding of the aircraft. The regulations aim to maintain the highest safety standards in civil aviation.