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 issues the following Airworthiness Directive (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.
Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes
AD/TB20/44 MLG Hinged Strut 12/2003 DM
Applicability: Model TB 20 and TB 21 aircraft, serial numbers 1 through 2208 that have accumulated less than 50 flight hours or 50 landings, whichever occurs first, since delivery or since hinged strut or lower half-leg replacement; and
Hinged struts and lower half-legs supplied as spares until 15 September 2003.
Requirement: Action in accordance with Socata Service Bulletin TB No. 10-139, dated September 2003.
Note: DGAC AD 2003-390(A) refers.
Compliance: Within 5 flight hours after 22 October 2003.
This Airworthiness Directive becomes effective on 22 October 2003.
Background: Reports were received of two cases of uncrimping of the bearing that connects the landing gear hinged strut to the landing gear leg.
David Villiers
Delegate of the Civil Aviation Safety Authority 14 October 2003
The above AD is notified in the Commonwealth of Australia Gazette on 22 October 2003.
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Overview
The Civil Aviation Safety Regulations 1998, enacted by the Australian Parliament, aim to ensure that civil aviation in Australia is conducted with the highest regard for safety. These regulations, overseen by the Civil Aviation Safety Authority (CASA), include provisions that mandate airworthiness directives (ADs) to address specific safety concerns. One such AD is AD/TB20/44, issued in 2003, which applies to Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes. This directive was introduced to address a reported issue with the uncrimping of bearings in the landing gear hinged struts, which could pose a safety risk. The directive requires action in accordance with Socata Service Bulletin TB No. 10-139 and mandates that the specified action be taken within five flight hours after the AD became effective on 22 October 2003. This regulatory measure ensures that the identified unsafe condition is promptly rectified to maintain the airworthiness of the affected aircraft.
Scope and Application
The Civil Aviation Safety Regulations 1998, specifically PART 39 - 105, under the Civil Aviation Safety Authority (CASA), govern the safety standards for aviation operations within Australia. This particular Airworthiness Directive (AD) issued by a CASA delegate targets Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes. The directive applies to Model TB 20 and TB 21 aircraft with serial numbers ranging from 1 to 2208, which have accumulated less than 50 flight hours or 50 landings since delivery or since the replacement of the hinged strut or lower half-leg. Additionally, it applies to hinged struts and lower half-legs supplied as spares until 15 September 2003. The directive mandates compliance with Socata Service Bulletin TB No. 10-139, dated September 2003, and requires corrective action within 5 flight hours after 22 October 2003. This AD becomes effective on the same date it was issued and notified in the Commonwealth of Australia Gazette.
Key Provisions
The Civil Aviation Safety Regulations 1998, specifically under Part 39, section 105, detail an Airworthiness Directive (AD) for Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, identified as AD/TB20/44 (subsection 39.1(1)). This AD mandates specific actions to address an identified unsafe condition concerning the main landing gear (MLG) hinged strut. The AD applies to TB 20 and TB 21 aircraft, serial numbers 1 through 2208, which have accumulated fewer than 50 flight hours or 50 landings since their delivery or since the replacement of the hinged strut or lower half-leg. Additionally, it covers hinged struts and lower half-legs supplied as spares until 15 September 2003. The requirement is that the action specified in Socata Service Bulletin TB No. 10-139, dated September 2003, must be taken. This directive references DGAC AD 2003-390(A) for additional context.
The AD imposes obligations on the parties or entities it governs, which include aircraft operators and maintenance providers. Specifically, they must ensure that the specified action, as outlined in the Socata Service Bulletin, is implemented within the stipulated timeframe. This involves inspecting and potentially replacing or repairing the MLG hinged strut to prevent uncrimping of the bearing that connects the landing gear hinged strut to the landing gear leg, which has been reported in two cases. Compliance with this AD is mandatory and must occur within five flight hours after 22 October 2003, the date on which the AD becomes effective.
Failure to comply with the Airworthiness Directive can lead to significant consequences. The Civil Aviation Safety Regulations 1998 do not explicitly state the penalties for non-compliance within the provided text; however, non-compliance with ADs generally results in regulatory action. This could include fines, suspension, or revocation of airworthiness certificates, or other enforcement actions by the Civil Aviation Safety Authority. The seriousness of the issue addressed by the AD, which pertains to critical flight safety, underscores the importance of strict adherence to the specified requirements.