Overview

The Airworthiness Directive AD/BEECH 56/32 was enacted in 2002 by the Civil Aviation Safety Authority (CASA) to address safety concerns regarding the flap flex shaft assemblies in Beechcraft 56TC (Turbo Baron) Series aeroplanes. The directive was introduced in response to reports of flap flex shaft separations that resulted in asymmetric flap situations, which were attributed to improper heat treatment of the flex shafts. Specifically, flex shafts manufactured between January 2000 and April 2001 were found to be at risk. The policy objective of this directive is to ensure the continued airworthiness of affected aircraft by mandating inspections and necessary replacements of the flex shafts to prevent potential safety hazards. Compliance with the directive is required within 25 flight hours from its effective date, and any replacements must be made before further flight.

Scope and Application

The Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) pertains specifically to the Beechcraft 56TC and A56TC series aeroplanes, covering all serial numbers. This legislative instrument aims to address safety concerns related to the flap flex shaft assembly, mandating actions to rectify potential unsafe conditions in these aircraft. The directive applies to all operators of the specified Beechcraft models, requiring them to inspect and potentially replace certain components to ensure continued airworthiness. The directive is effective across the Commonwealth of Australia and was issued to mitigate risks associated with improper heat treatment of flap flex shafts manufactured between January 2000 and April 2001, which have been linked to separations and flap asymmetry. Compliance with the AD involves reviewing aircraft records, inspecting the manufacture dates of flex shafts, and replacing those manufactured within the specified period before further flight. The AD was issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 and became effective on 30 January 2002.

Key Provisions

This Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) applies to all Beechcraft 56TC and A56TC series aircraft. The directive requires the review of aircraft records to determine if any of the left-hand (LH) or right-hand (RH) flap flex shafts or the flap actuator have been replaced since 1 March 2000. If these components have not been replaced, no further action is required, and an appropriate certification must be made in the aircraft logbook. However, if any of these components have been replaced since that date, the identification label for the manufacture date of the flap flex shaft assemblies must be inspected in accordance with Raytheon Service Bulletin 27-3478. Flex shafts manufactured before January 2000 or after April 2001 do not require replacement. If any flex shafts were manufactured between January 2000 and April 2001, they must be replaced. The AD imposes several obligations on the relevant parties. Firstly, aircraft owners or operators must review their records to ascertain whether any of the specified components have been replaced since 1 March 2000. If these components have not been replaced, they must document this in the aircraft logbook. If any of the components have been replaced, the manufacture date must be verified against the specified criteria, and any flex shafts manufactured between January 2000 and April 2001 must be replaced. The compliance requirements mandate that these inspections and replacements be carried out within 25 flight hours from the effective date of the AD, which was 30 January 2002, and before further flight if any replacements are necessary. Failure to comply with the requirements of this AD can result in severe consequences. The primary risk is the potential for flap asymmetric situations due to flap flex shaft separations, which could compromise the safety of the aircraft. The AD references FAA AD 2001-23-10, indicating that there are already established federal regulations and penalties for non-compliance with similar requirements in other jurisdictions. Although the AD itself does not explicitly state penalties, non-compliance with CASA directives generally can result in civil penalties, including fines and potential grounding of the aircraft. In severe cases, criminal charges could be pursued, leading to more substantial fines and imprisonment.