COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DHC-8/63 Amdt 1. and issues the following AD under subregulation 39.1 (1) of CAR 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 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.
AD/DHC-8/63
Amdt 2
Horizontal Stabiliser Skin Disbonding Follow-Up - 2
3/2000
Applicability: All DHC-8 Series aircraft which have horizontal stabilisers serial numbers CAP 003 through CAP 050 fitted.
Note: As the aircraft serial number may not be the same as that of the horizontal stabiliser, it may be necessary to check the data plate on the left side of the horizontal stabiliser and the component record cards to identify the stabiliser.
Requirement: 1. Provide bond integrity test samples as follows:
- In accordance with instructions in Bombardier Repair Drawing (RD) RD8-55- 669 Issue 3, dated 17 March 1999, cut small samples from the affected bonded horizontal stabiliser skins as test coupons for bonding integrity testing.
b. Mark the cut samples in accordance with instructions in RD8-55-669 Issue 3.
c. Send the cut samples to Bombardier Aerospace at the address shown in RD8- 55-669 Issue 3, for testing.
d. Complete installation of the repair in accordance with RD8-55-669 Issue 3 to return aircraft to service.
2. Replace and/or repair the horizontal stabiliser, or;
3. Return the horizontal stabiliser to the normal bonding integrity inspection program in accordance with PSM 1-8-7.
Note: Transport Canada AD CF-99-15 R1 refers.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Compliance: 1. Unless already accomplished, provide samples to Bombardier for testing before 24 April 2000.
2. Replace or repair before further flight if notified by Bombardier Aerospace that the bonding samples do not meet the acceptance criteria specified in the Appendix to Bombardier engineering document, AEROC 8.4.AC.12, Section 55-0013-1, Issue
2. Otherwise, replace or repair if no notification is received within 30 days after completion of repair action described in Requirement 1, or;
3. Return the horizontal stabiliser to the normal inspection program if notified by Bombardier Aerospace that the bonding samples meet the acceptance criteria specified in the Appendix to Bombardier engineering document, AEROC 8.4.AC.12, Section 55-0013-1, Issue 2.
The compliance time for Requirement 1 remains unchanged for this issue. This Amendment becomes effective on 23 March 2000.
Background: Inspections mandated by Airworthiness Directives AD/DHC-8/51 and AD/DHC-8/55 have identified the need for an additional disbonding check of the skin panels on the horizontal stabilisers with serial numbers CAP 003 to CAP 050.
Amendment 1 reflected the issue of AEROC 8.4.AC.12, Section 55-0013-1 Issue 2, which incorporates new test criteria for the horizontal stabiliser skin test coupons.
Amendment 2 is issued to correct the Requirement 1 compliance to provide new test samples.
The original issue of this Airworthiness Directive became effective on 28 July 1999.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 14 February 2000
The above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.
Overview
The Civil Aviation Regulations 1998, as amended by the Civil Aviation (Airworthiness) Regulations 1998, was enacted to ensure the safety of civil aviation in Australia. This legislative instrument, specifically PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITYSCHEDULE OF AIRWORTHINESS DIRECTIVES, was introduced to address the identified need for additional disbonding checks on the skin panels of certain horizontal stabilisers of the Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes. The enactment of this regulation by the Civil Aviation Safety Authority (CASA) aims to mitigate the risk of unsafe conditions in the aircraft, thereby ensuring the safety of passengers and crew. The policy objective is to maintain and enhance the airworthiness of aircraft through rigorous and continuous safety assessments and directives, as demonstrated by the issuance of Airworthiness Directive AD/DHC-8/63 Amdt 2, which focuses on the horizontal stabiliser skin disbonding follow-up for specific aircraft models.
Scope and Application
The Civil Aviation Regulations 1998, specifically under PART 39 - 105, pertain to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives for Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes. This Airworthiness Directive (AD) applies to all DHC-8 Series aircraft equipped with horizontal stabilisers serial numbers CAP 003 through CAP 050. This directive is essential for ensuring the safety of the aircraft by addressing the disbonding of the skin panels on the horizontal stabilisers, which have been identified as a potential safety concern. The AD mandates specific actions to be taken by operators to rectify the identified unsafe condition. The AD outlines the procedures for providing bond integrity test samples, sending these samples to Bombardier Aerospace for testing, and the subsequent actions to be taken based on the test results. The directive's compliance requirements must be met by all operators of the specified aircraft to maintain their airworthiness status. The AD also notes that it revokes a previous directive, AD/DHC-8/63 Amdt 1, and replaces it with this new directive.
Key Provisions
This Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) pertains specifically to Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes with horizontal stabilisers serial numbers CAP 003 through CAP 050. It revokes a previous AD and sets out new requirements to address potential disbonding issues in the horizontal stabiliser skins. The main sections of the AD include the applicability, requirement, and compliance sections. Section 1 specifies that the AD applies to all DHC-8 Series aircraft with the aforementioned horizontal stabiliser serial numbers. Section 2 outlines the actions that must be taken to ensure the safety of these aircraft. This involves cutting test samples from the affected bonded horizontal stabiliser skins as per Bombardier Repair Drawing RD8-55-669 Issue 3, marking these samples, sending them to Bombardier Aerospace for testing, and completing the repair to return the aircraft to service. Section 3 provides alternatives, including replacing or repairing the horizontal stabiliser or returning it to the normal bonding integrity inspection program.
The AD imposes several obligations and requirements on the parties governed by it. Operators of the specified DHC-8 Series aircraft must ensure that the actions outlined in the requirement section are completed. This includes providing bond integrity test samples to Bombardier Aerospace for testing and adhering to the instructions set out in Bombardier Repair Drawing RD8-55-669 Issue 3. Operators must also ensure that the repair is completed in accordance with the drawing to return the aircraft to service. If notified by Bombardier Aerospace that the bonding samples do not meet the acceptance criteria, the operator must replace or repair the horizontal stabiliser before further flight. If no notification is received within 30 days, or if the samples meet the acceptance criteria, the stabiliser must be returned to the normal inspection program.
Failure to comply with the AD may result in civil or criminal consequences. While the specific penalties are not detailed in the AD itself, non-compliance with CASA regulations generally can result in enforcement actions by CASA. These actions can include fines, enforcement notices, or even the grounding of the aircraft. The exact penalties would depend on the nature and severity of the non-compliance, but they can be significant, reflecting the serious nature of aviation safety.