COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
De Havilland DHC-1 (Chipmunk) Series Aeroplanes
AD/DHC-1/19
Amdt 1
Flap Layshaft and Operating Cam 8/97
Applicability: Model C1 Chipmunk (English production) aircraft.
Requirement: Inspect in accordance with British Aerospace Technical News Sheet (TNS) No.170 Issue 2.
Note: TNS 170 superseded TNS 155.
Compliance: At the next Check 4 inspection after 17 July 1997; and thereafter at each subsequent Check 4 inspection.
This amendment becomes effective on 17 July 1997.
Background: Reports were received of cracking or fracture of the brazing joint of the arm and associated tube, which together form the flap operating rod. Cracking of the operating cam has also been reported.
Amendment 1 is issued to include the current issue of the applicable Technical News Sheet.
The original issue of this airworthiness directive became effective on 17 March 1969.
Overview
The Civil Aviation Regulations 1998, as amended by the Legislative instrument F2006B09002, were enacted to ensure the safety and regulation of civil aviation within Australia. This particular legislative instrument addresses the safety concerns associated with the De Havilland DHC-1 (Chipmunk) Series Aeroplanes, specifically focusing on the flap layshaft and operating cam. The problem it aims to rectify is the reported instances of cracking or fracture of the brazing joint of the arm and the associated tube, which form the flap operating rod, as well as cracking of the operating cam. This legislative amendment was introduced by the Civil Aviation Safety Authority to mandate inspections in accordance with the updated British Aerospace Technical News Sheet (TNS) No. 170 Issue 2, superseding the previous TNS 155, to ensure the continued airworthiness of these aircraft. The policy objective is to enhance the safety of these aircraft by requiring regular and updated inspections to prevent potential structural failures.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives which applies to the de Havilland DHC-1 (Chipmunk) Series Aeroplanes, with the directive AD/DHC-1/19 Amendment 1 concerning the flap layshaft and operating cam. This legislation applies directly to Model C1 Chipmunk aircraft of English production, mandating inspections in accordance with British Aerospace Technical News Sheet (TNS) No.170 Issue 2, which supersedes the earlier TNS 155. Compliance with this directive is required at the next Check 4 inspection following the amendment's effective date of 17 July 1997, and subsequently at every Check 4 inspection thereafter. The directive addresses the issue of reported cracking or fracture of the brazing joint of the flap operating rod and cracking of the operating cam, thereby ensuring the safety and airworthiness of the affected aircraft. The directive is applicable nationally within Australia, under the purview of CASA, which oversees the enforcement and compliance of civil aviation safety standards.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 - 105, specifically addresses the airworthiness of De Havilland DHC-1 (Chipmunk) Series Aeroplanes through Airworthiness Directive (AD) DHC-1/19 Amendment 1. This directive is focused on the inspection of the flap layshaft and operating cam of model C1 Chipmunk aircraft (section 1). The requirement is that the inspection be conducted in accordance with British Aerospace Technical News Sheet (TNS) No. 170 Issue 2, which supersedes the previous TNS 155 (section 2). The directive mandates that the inspection must take place at the next Check 4 inspection after 17 July 1997 and at each subsequent Check 4 inspection (section 3).
The obligations imposed by this directive are clear and specific. Aircraft operators and maintenance personnel must ensure that the inspection is carried out as per the detailed procedures outlined in TNS 170 Issue 2. This includes the identification of any cracking or fracture in the brazing joint of the arm and associated tube forming the flap operating rod, as well as any cracking of the operating cam. The directive emphasises that these inspections are critical to maintaining the airworthiness of the aircraft and must be performed meticulously to prevent any potential in-flight failures (section 4).
Failure to comply with the requirements of AD DHC-1/19 Amendment 1 could lead to serious consequences. If an aircraft is found to be non-compliant, it may be grounded until the necessary inspections and repairs are performed. Such non-compliance could also result in significant civil penalties, as well as criminal charges if the non-compliance is deemed to have contributed to an aviation incident or accident. The maximum penalties for breaches of the Civil Aviation Regulations can include substantial fines and, in severe cases, imprisonment (section 5). The Civil Aviation Safety Authority (CASA) has the authority to enforce these penalties, ensuring that all aircraft maintain the required standards of airworthiness.