AD/DH 104/16 - Flap System Modification to Prevent Crossing of Pneumatic Lines

Overview

The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B08860, is a comprehensive set of rules enacted by the Parliament of Australia to ensure the safety and efficiency of civil aviation in the country. This legislation addresses gaps in the regulation of civil aviation, aiming to provide a robust framework for the oversight of aircraft operations, maintenance, and safety standards. The Civil Aviation Safety Authority (CASA) administers these regulations, with a primary policy objective of ensuring the highest possible level of safety in civil aviation. One specific aspect of these regulations is the Airworthiness Directive (AD) pertaining to De Havilland DH 104 (Dove) Series Aeroplanes, known as AD/DH 104/16. This directive, issued on 8 July 1971, applies to all models of the Dove series and mandates modifications to the flap system to prevent the crossing of pneumatic lines. Compliance with this directive was required before 1 September 1971, underscoring the commitment to addressing safety issues through timely and specific regulatory measures.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives DH 104 (Dove) Series Aeroplanes AD/DH 104/16, applies to all models of De Havilland Mod. No. 607 aircraft, focusing on the flap system to prevent the crossing of pneumatic lines. This regulation mandates compliance before 1 September 1971, ensuring that all affected aircraft meet specific safety standards to mitigate the risk of pneumatic line crossings, which could compromise the integrity of the aircraft's flap system. The regulation's reach is nationwide, governed by the Commonwealth of Australia, and it applies to any person or entity operating De Havilland Mod. No. 607 aircraft within Australian jurisdiction. The regulation does not specify any exclusions, exemptions, or thresholds, implying that all qualifying aircraft must adhere to the outlined safety directives. While the primary Act sets forth the core requirements, the application and enforcement of these standards may be further detailed or extended through subordinate instruments as deemed necessary by the Civil Aviation Safety Authority.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, particularly in PART 39 - 105, pertain to the specific airworthiness directive AD/DH 104/16, which mandates modifications to the flap system of all De Havilland DH 104 (Dove) series aeroplanes. Section 105 of the Civil Aviation Regulations, in conjunction with the applicable airworthiness directive AD/DH 104/16, requires that modifications to the flap system be completed to prevent the crossing of pneumatic lines. This directive applies to all models of the De Havilland DH 104 series aeroplanes, as specified in the document De Havilland Mod. No. 607, and must be completed before 1 September 1971. The Civil Aviation Regulations impose several obligations and requirements on the parties and entities governed by AD/DH 104/16. Firstly, all owners and operators of De Havilland DH 104 series aeroplanes must ensure that the necessary modifications to the flap system are carried out in accordance with the specifications outlined in De Havilland Mod. No. 607. This includes conducting a thorough inspection to confirm that the modifications are complete and that the risk of pneumatic line crossing is effectively mitigated. Secondly, these entities are required to maintain records of the modifications, including documentation of compliance with the directive and any inspections or tests conducted. Such records must be readily available for inspection by the Civil Aviation Safety Authority (CASA) upon request. Failure to comply with the requirements set forth in AD/DH 104/16 can result in serious legal and operational consequences. Under the Civil Aviation Act 1988, non-compliance with an airworthiness directive can be considered an offence, leading to potential civil and criminal penalties. The specific penalties for breach of these regulations can include substantial fines, with the maximum penalty varying based on the severity of the breach and whether it is considered a civil or criminal offence. Additionally, non-compliance may result in the grounding of affected aircraft until the required modifications are completed and verified by CASA, thereby impacting the operational readiness and safety of the aeroplanes involved.