AD/LUSCOMBE/1 - Vertical Stabiliser Fitting

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, aim to ensure the safety of civil aviation operations within the country. This legislation, overseen by the Civil Aviation Safety Authority (CASA), addresses issues related to aircraft airworthiness, including the issuance of Airworthiness Directives (ADs) that mandate specific safety measures. One such directive, AD/LUSCOMBE/1, pertains to Luscombe Model 8 Series Aeroplanes, requiring the replacement of certain aluminium vertical stabiliser fittings to mitigate the risk of potential failure. The directive was introduced to address safety concerns identified by the Federal Aviation Administration (FAA), which CASA adopted and adapted for Australian-registered aircraft. The policy objective is to ensure the continued airworthiness and safety of these aircraft by implementing specific modifications as directed. Compliance with AD/LUSCOMBE/1 is mandatory for all Model 8 Series aircraft with round-tipped vertical stabiliser installations, requiring the replacement of the aluminium vertical stabiliser forward attach fitting within 100 hours of service after 13 October 1994, unless the replacement has already been completed. The directive specifies the use of either a Luscombe part number 28455 fitting manufactured by the Don Luscombe Aviation History Foundation (DLAHF), a welded steel fitting by Univair Aircraft Corporation, or an FAA-approved part. This requirement aligns with FAA AD 94-16-02, which supersedes an earlier directive, AD 79-25-05.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines an airworthiness directive concerning Luscombe Model 8 Series Aeroplanes, mandating the replacement of certain vertical stabiliser fittings. This directive applies to all Model 8 Series aircraft equipped with round-tipped vertical stabiliser installations. The regulation requires the replacement of the aluminium vertical stabiliser forward attach fitting, identified as Luscombe part numbers 28415, 28444, or 28453, with an alternative fitting that meets the specified criteria. These alternatives include a Luscombe part number 28455 fitting produced by the Don Luscombe Aviation History Foundation (DLAHF), a welded steel fitting from Univair Aircraft Corporation (part number U28444), or an FAA approved part. This replacement must be conducted according to the procedures outlined in DLAHF Service Recommendation #1, dated November 28, 1993. The directive mandates that this action be completed within 100 hours of time in service after 13 October 1994, ensuring compliance with FAA AD 94-16-02 Amdt 39-8991, which supersedes the previous AD 79-25-05 Amdt 39-3630. This regulation underscores the importance of maintaining the structural integrity of the vertical stabiliser to prevent potential failures.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 - 105 (AD/LUSCOMBE/1), specifies the requirements for the vertical stabiliser fitting on Luscombe Model 8 Series aeroplanes (1). The main requirement is the replacement of the aluminium vertical stabiliser forward attach fitting, Luscombe part numbers 28415, 28444, or 28453, with a new fitting. The acceptable replacements include a Luscombe part number 28455 fitting manufactured by the Don Luscombe Aviation History Foundation (DLAHF), a welded steel fitting by Univair Aircraft Corporation part number U28444, or an FAA approved part. This replacement must be carried out according to the procedures detailed in DLAHF Service Recommendation #1, dated November 28, 1993 (2). It should be noted that this directive supersedes previous directives, such as AD 79-25-05 Amdt 39-3630, and aligns with FAA AD 94-16-02 Amdt 39-8991. The Civil Aviation Regulations impose several obligations on the operators of Luscombe Model 8 Series aeroplanes with round-tipped vertical stabiliser installations. Operators must ensure that the replacement of the aluminium vertical stabiliser forward attach fitting is completed unless it has already been done (3). This compliance must occur within 100 hours of time in service after 13 October 1994 (4). Failure to adhere to these requirements could potentially compromise the safety of the aircraft, leading to severe consequences for both the operator and the passengers. Failure to comply with the provisions set out in the Civil Aviation Regulations can result in various consequences. Firstly, there are potential safety risks if the specified replacement is not performed. More critically, non-compliance can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). The specific penalties for non-compliance are not detailed in the excerpt provided, but generally, such breaches can result in substantial fines, legal action, or even the grounding of the aircraft until the required modifications are completed. The severity of the penalties reflects the importance of adhering to these safety directives to maintain the highest standards of aviation safety.