COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DHC-1/35 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
De Havilland DHC-1 (Chipmunk) Series Aeroplanes
AD/DHC-1/35
Amdt 1
Engine Mounting Frame Joints 13/2003
Applicability: DHC-1 aircraft with Engine Mounting Frames Part Number C1.EM.1A L.H. and C1.EM.2A R.H. installed.
Requirement: Action in accordance with British Aerospace Technical News Sheet CT (C1) No. 190 Issue 2.
Note: UK CAA AD 003-08-94 refers.
Compliance: Within 90 days after 25 December 2003, unless the initial inspection has already been accomplished in accordance with British Aerospace Technical News Sheet CT (C1) No. 190 Issue 2. Thereafter inspect at intervals not to exceed 600 hours time in service.
This Amendment becomes effective on 25 December 2003.
Background: The manufacturer received reports of cracked engine mounting frames.
Amendment 1 is issued to update the Requirement document to the current issue.
David Villiers
Delegate of the Civil Aviation Safety Authority 12 November 2003
The above AD is notified in the Commonwealth of Australia Gazette on 3 December 2003.
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Overview
The Civil Aviation Safety Regulations 1998, as amended by the legislative instrument F2006B09016, address the safety issues related to aircraft maintenance and airworthiness. This particular legislative instrument revokes the previous Airworthiness Directive (AD) AD/DHC-1/35 and introduces a new AD for De Havilland DHC-1 (Chipmunk) Series Aeroplanes. The Civil Aviation Safety Authority (CASA) issued this directive in response to reports of cracked engine mounting frames in DHC-1 aircraft with specific engine mounting frames installed. The policy objective is to ensure the safety of the aircraft by requiring inspections and maintenance actions that are aligned with current technical guidelines, thereby mitigating the risk of in-flight failures due to structural issues. This directive mandates that inspections and corrective actions be carried out within a specified timeframe and at regular intervals to ensure ongoing airworthiness of the affected aircraft.
Scope and Application
The Civil Aviation Safety Regulations 1998, specifically under Part 39 - 105, address the maintenance and airworthiness of aircraft within Australia. This particular Airworthiness Directive (AD) applies to De Havilland DHC-1 (Chipmunk) Series Aeroplanes equipped with specific engine mounting frames, namely Part Number C1.EM.1A L.H. and C1.EM.2A R.H. The directive mandates corrective actions to address a condition deemed unsafe, as identified by the Civil Aviation Safety Authority (CASA). The directive, which is effective from 25 December 2003, requires inspections and actions in line with British Aerospace Technical News Sheet CT (C1) No. 190 Issue 2, with the initial inspection to be completed within 90 days of the directive's effective date and subsequent inspections at intervals not exceeding 600 hours of flight time. This regulatory measure ensures that the specified aircraft meet necessary safety standards and prevents potential safety hazards associated with cracked engine mounting frames.
Key Provisions
The Airworthiness Directive (AD) AD/DHC-1/35 Amendment 1 focuses on DHC-1 aircraft that are equipped with specific engine mounting frames, namely Part Number C1.EM.1A L.H. and C1.EM.2A R.H. (Section 1). The directive mandates that action be taken to address a reported issue of cracked engine mounting frames (Section 2). This action must be in line with British Aerospace Technical News Sheet CT (C1) No. 190 Issue 2 and should be completed within 90 days from 25 December 2003, unless the initial inspection has already been performed according to the same technical news sheet (Section 3). After the initial action, further inspections should occur at intervals not exceeding 600 hours of time in service (Section 3).
The AD imposes specific obligations on the entities it governs. Operators of DHC-1 aircraft must ensure that the required actions are carried out in accordance with the instructions provided in British Aerospace Technical News Sheet CT (C1) No. 190 Issue 2. This involves conducting inspections and taking corrective measures to rectify any identified issues with the engine mounting frames. The directive also mandates that these inspections and corrective actions must be completed within the stipulated timeframe of 90 days from 25 December 2003, unless the initial inspection has already been performed (Section 3). Additionally, operators are required to adhere to the specified inspection intervals of not more than 600 hours of time in service following the initial compliance (Section 3).
Failure to comply with the provisions of this AD can result in civil and criminal consequences. Under the Civil Aviation Act 1988, non-compliance with an AD is considered an offence (Section 148). The maximum penalty for individuals found guilty of contravening an AD is a fine of up to 200 penalty units ($44,100 as of 2023), while the maximum penalty for a body corporate is 10 times that amount (Section 148). Additionally, the AD may be enforced by the Civil Aviation Safety Authority (CASA), which has the authority to issue compliance orders, suspend or revoke air operator certificates, and take other enforcement actions against non-compliant operators (Section 148). These measures are intended to ensure that aircraft remain airworthy and safe for operation.