AD/OPTICA/4 - Fan Shaft Extension

Overview

The Civil Aviation Regulations 1998, as amended by F2006B11416, were introduced to address critical safety concerns in civil aviation, particularly focusing on the airworthiness of specific aircraft models. This legislative instrument pertains to the OA7 Optica series aeroplanes, aiming to rectify manufacturing defects that could compromise the structural integrity of the aircraft. The Civil Aviation Safety Authority (CASA) is the enacting body responsible for ensuring that all civil aviation activities in Australia are conducted safely and efficiently. The primary policy objective of this directive is to mandate corrective actions for identified safety issues, ensuring that all OA7 Optica aircraft meet the necessary airworthiness standards. This directive requires compliance with FLS Aerospace’s Service Bulletin No B2/MSB/006, effective from 5 January 1995, to rectify potential fan shaft issues that could endanger the aircraft’s operational safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all model OA7 Optica aircraft up to and including aircraft serial number 22 that are fitted with a Hoffmann fan and a fan shaft extension. This legislation mandates compliance with the FLS Aerospace LOVAUX Mandatory Service Bulletin No B2/MSB/006 Issue 1, with a compliance date set for 5 January 1995. The regulation is designed to address a manufacturing error identified by the manufacturer, where the depth of the four counter bores might have exceeded specified limits, potentially compromising the integrity of the fan's attachment to the engine. The legislation's scope is national, applying to all relevant aircraft within the Commonwealth of Australia, and it does not explicitly state any exclusions, exemptions, or thresholds beyond the specified serial numbers and aircraft model. The application of this regulation is further detailed through the subordinate instrument, which extends its requirements to ensure the safety and airworthiness of the affected aircraft.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1998, particularly in relation to the airworthiness directive AD/OPTICA/4 for the FLS Aerospace OA7 Optica series aeroplanes, require specific actions to ensure the safety of the aircraft. Section 39-105 of the Regulations outlines the schedule of airworthiness directives, which mandates that all model OA7 Optica aircraft up to and including serial number 22, equipped with a Hoffmann fan and fan shaft extension, must comply with the directive. This action is specified in FLS Aerospace's LOVAUX Mandatory Service Bulletin No B2/MSB/006 Issue 1, with reference to the UK Civil Aviation Authority’s AD 010-08-94. The directive became effective from 5 January 1995, and compliance is to be achieved as outlined in the Requirement Document. The obligations imposed by this directive are primarily on the operators and owners of the affected aircraft. They must ensure that the necessary modifications, as detailed in the FLS Aerospace service bulletin, are carried out to rectify the manufacturing error. This involves verifying the depth of the four counter bores and making any necessary adjustments to maintain the integrity of the fan to engine attachment. Operators must also ensure that all work is performed by personnel who are qualified and approved by the relevant authority. Failure to comply with this airworthiness directive can result in significant consequences. Section 96 of the Civil Aviation Act 1988 provides that failure to comply with an airworthiness directive can be considered an offence. The penalties for such non-compliance can include fines and potential prosecution. The exact penalties may vary depending on the circumstances, but they are intended to enforce the strict adherence to safety standards. Non-compliance could also lead to the grounding of the aircraft until the necessary modifications are made, thereby impacting the operational readiness and potentially the financial viability of the operators.