COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
DHC-6 (Twin Otter) Series Aeroplanes
AD/DHC-6/72 Corrosion Prevention and Control - 2 13/99
Applicability: Model DHC-6 aircraft that are in full compliance with Airworthiness Directives AD/DHC-6/69 (CF-94-12) or AD/DHC-6/69 Amdt 1 (CF-99-12R1).
Requirement: Action in accordance with the technical requirements of Transport Canada (TC) AD CF-99-11.
The following is a substitution for the last paragraph of the Requirement document which states reporting requirements:
Corrosion classified as Level 1 need not be reported.
Level 2 corrosion may be consolidated with a quarterly report of corrective action, and submitted to the Authority District (Airport) Office under cover of a single MDR.
Level 3 corrosion shall be reported by MDR.
Compliance: As specified in the Requirement document with a revised effective date of 30 December 1999.
This Airworthiness Directive becomes effective on 30 December 1999.
Background: The Corrosion Prevention and Control Manual requirement for repetitive inspections after initial compliance was deleted by the issue of AD/DHC-6/69 Amdt 1. This Directive is issued in response to a new TC AD which requires Corrosion Tasks (CTs) to be performed on a repetitive basis and provides the option of performing the CTs during several maintenance visits in one year (Part A) or a specific group of CTs on an annual basis over a five year period (Part B).
Overview
The Civil Aviation Regulations 1998 (Cth), specifically PART 39 - 105, introduces Airworthiness Directives concerning DHC-6 (Twin Otter) Series Aeroplanes. This regulation was enacted to address the issue of corrosion prevention and control within the specified aircraft model. The Civil Aviation Safety Authority (CASA) is the enacting body responsible for establishing these directives to ensure the safety and airworthiness of the aircraft. The policy objective behind this legislation is to mandate technical requirements that align with international standards, such as those set by Transport Canada, to mitigate risks associated with corrosion and ensure that corrective actions are appropriately reported and managed. This legislative instrument aims to provide a structured approach to maintaining the integrity of the aircraft through regular inspections and adherence to specified reporting protocols.
Scope and Application
The Civil Aviation Regulations 1998, as outlined in PART 39 - 105, specifically address the airworthiness directives for DHC-6 (Twin Otter) series aeroplanes through AD/DHC-6/72. This legislation applies to DHC-6 aircraft models that have demonstrated full compliance with previous airworthiness directives AD/DHC-6/69 (CF-94-12) or AD/DHC-6/69 Amdt 1 (CF-99-12R1). The directive requires adherence to the technical specifications stipulated by Transport Canada's AD CF-99-11. The scope of this legislation encompasses the mandatory actions required to maintain airworthiness, particularly focusing on corrosion prevention and control. The regulations delineate specific reporting requirements for varying levels of corrosion, with Level 1 corrosion exempted from reporting, Level 2 corrosion to be reported quarterly, and Level 3 corrosion necessitating immediate reporting. Compliance with these directives is mandatory and must align with the specified requirements, with a revised effective date of 30 December 1999. The regulations extend their applicability nationally, ensuring uniformity in the maintenance and safety standards across all Commonwealth territories.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, which deals with the Civil Aviation Safety Authority Schedule of Airworthiness Directives, contains provisions for the DHC-6 (Twin Otter) Series Aeroplanes. One such directive is AD/DHC-6/72, which addresses corrosion prevention and control. This directive applies to Model DHC-6 aircraft that have fully complied with Airworthiness Directives AD/DHC-6/69 (CF-94-12) or AD/DHC-6/69 Amdt 1 (CF-99-12R1) (Section 1). The directive requires aircraft operators to adhere to the technical requirements outlined by Transport Canada AD CF-99-11 (Section 2). The directive also specifies how corrosion should be reported, with Level 1 corrosion not requiring any report, Level 2 corrosion to be consolidated and submitted in a quarterly report, and Level 3 corrosion to be reported by means of a Maintenance Defect Report (MDR) (Section 4).
Operators of DHC-6 aircraft must comply with the directive as specified in the Requirement document, with an effective date of 30 December 1999 (Section 5). The directive itself becomes effective on the same date (Section 6). The background to this directive indicates that the requirement for repetitive inspections after initial compliance has been deleted by the issue of AD/DHC-6/69 Amdt 1. The directive is issued in response to a new Transport Canada AD that mandates repetitive corrosion tasks and provides options for performing these tasks during multiple maintenance visits within a year or on an annual basis over a five-year period (Section 7).
Failure to comply with the Airworthiness Directive may result in penalties as stipulated under the Civil Aviation Act 1988 and Civil Aviation Regulations 1988. These may include fines, suspension or revocation of an operator's certificate, and potential criminal charges in cases of serious non-compliance that result in harm or risk of harm. The maximum penalties can vary significantly depending on the severity of the breach and the specific regulations involved. It is essential for operators to adhere strictly to the provisions of the directive to avoid such consequences.