COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
GAF N22 and N24 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/GAF-N22/74 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 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.
AD/GAF-N22/74
Amdt 1
Left Wing Aft Wing Break Electrical Connector
11/2001
Applicability: Nomad N22 and N24 series aeroplanes, line sequence numbers as listed in Aerospace Technologies of Australia (ASTA) Nomad Service Bulletin (SB) ANMD-57-13 Revision 1 dated 14 August 2001.
Requirement: 1. Inspect the left wing aft wing break electrical connector in accordance with ASTA Nomad SB ANMD-57-13 Revision 1.
2. If any contamination is found during the Requirement 1 inspection clean the connector in accordance with ASTA Nomad SB ANMD-57-13 Revision 1.
3. If any arcing damage, deposits between contacts or looseness of contacts is found during the Requirement 1 inspection incorporate either Modification N875 (N22 aeroplanes) or Modification N876 (N24 aeroplanes) in accordance with ASTA Nomad SB ANMD-57-13 Revision 1.
Incorporation of Modification N875 or N876 is considered terminating action for the Requirement 1 repetitive inspections.
Compliance: For Requirement 1 - Within 300 hours time in service (TIS) from the last inspection accomplished in accordance with the original issue of AD/GAF-N22/74 and thereafter at intervals not to exceed 300 hours TIS until Modification N875 or N876 is incorporated.
For Requirement 2 - Before further flight following the Requirement 1 inspection. For Requirement 3 - Before further flight following the Requirement 1 inspection. This Amendment becomes effective on 1 November 2001.
Background: The original issue of this directive advised that ASTA had received reports of uncommanded flap extensions and incorrect stall warning indications. ASTA determined that contamination in the left aft wing electrical connector might have caused these occurrences. The actions specified in the Directive were designed to reduce the likelihood of the occurrences.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
This amendment introduces optional modifications (modification kits are available free of charge from ASTA) that eliminate the requirement for repetitive inspections. The amendment also introduces some minor formatting changes that clarify the requirement to rectify, before further flight, any discrepancies detected during the repetitive inspections.
The original issue of this Directive became effective on 24 January 1996.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 18 September 2001
The above AD is notified in the Commonwealth of Australia Gazette on 10 October 2001.
Overview
The Civil Aviation Regulations 1998, established by the Parliament of Australia, were enacted to provide comprehensive regulations governing civil aviation, ensuring safety and efficiency in the industry. Among these regulations, Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives addresses specific safety measures and directives to maintain aircraft airworthiness. This legislative instrument addresses problems related to the safety of GAF N22 and N24 series aeroplanes by mandating specific actions to correct unsafe conditions identified in these aircraft. The directive, issued by the Civil Aviation Safety Authority (CASA) delegate, revokes the previous Airworthiness Directive (AD/GAF-N22/74) and introduces new requirements to inspect, clean, and modify the left wing aft wing break electrical connector to prevent contamination-related issues, ultimately aiming to enhance the safety of these aircraft.
Scope and Application
The Civil Aviation Regulations 1998, as detailed in Part 39 - 105 of the Civil Aviation Safety Authority Schedule of Airworthiness Directives, apply to specific types of aircraft, namely the Nomad N22 and N24 series aeroplanes, which are identified by their line sequence numbers listed in Aerospace Technologies of Australia (ASTA) Nomad Service Bulletin ANMD-57-13 Revision 1 dated 14 August 2001. The directive pertains to the maintenance and inspection of the left wing aft wing break electrical connector to mitigate risks of uncommanded flap extensions and incorrect stall warnings, which were traced to potential contamination of the connector. The Airworthiness Directive requires inspections and potential modifications to be carried out by the aircraft's operators or maintainers as outlined in the Service Bulletin. Compliance with these directives is mandatory within specified timeframes and conditions, and failure to adhere to these requirements may result in the aircraft being deemed unairworthy. The directive, which is applicable nationally, is enforced by the Civil Aviation Safety Authority (CASA) and is subject to amendments that may further refine or expand upon the original requirements.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 - 105, establish Airworthiness Directives (AD) which are crucial for ensuring the safety of aircraft operations. In the case of the GAF N22 and N24 series aeroplanes, the AD/GAF-N22/74 Amendment 1 mandates specific actions to be taken regarding the left wing aft wing break electrical connector. The directive, signed by a CASA delegate, revokes the previous directive AD/GAF-N22/74 and introduces new requirements to address safety concerns. Specifically, Section 1 of the AD requires the inspection of the left wing aft wing break electrical connector as outlined in ASTA Nomad Service Bulletin (SB) ANMD-57-13 Revision 1. If contamination is detected, it must be cleaned according to the same bulletin, and if arcing damage, deposits between contacts, or looseness of contacts are found, the aeroplane must incorporate either Modification N875 (for N22 aeroplanes) or Modification N876 (for N24 aeroplanes), also as detailed in the bulletin. The incorporation of these modifications is considered the terminating action for repetitive inspections related to these requirements.
The AD imposes several obligations on the operators of the N22 and N24 series aeroplanes. Operators must ensure that the left wing aft wing break electrical connector is inspected within 300 hours of time in service (TIS) from the last inspection conducted under the original AD/GAF-N22/74 and subsequently at intervals not exceeding 300 hours TIS until the modifications are incorporated. Any contamination found during the inspection must be cleaned, and if any damage or deposits are identified, the respective modifications must be implemented before further flight. These requirements ensure that the aircraft maintain airworthiness and safety standards are upheld.
Failure to comply with the provisions of the AD may result in significant legal consequences. Although the specific civil or criminal penalties are not detailed in the text, non-compliance with airworthiness directives can lead to serious ramifications, including potential grounding of the aircraft, fines, and other penalties imposed by the Civil Aviation Safety Authority. The safety of passengers and crew, as well as the overall integrity of the aviation system, is paramount, and adherence to these directives is mandatory to avoid any legal repercussions.