AD/CESSNA 400/93 Amdt 1 - Crossfeed Fuel Line

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105 under the Civil Aviation Safety Authority (CASA) schedule of airworthiness directives, include amendments concerning the Cessna 400 series aeroplanes. This legislative instrument, identified as F2006B08377, was enacted to address safety concerns related to fuel line chafing in Cessna 414 models, serial numbers 414-0001 through 414-0965. The problem it aimed to resolve involved potential fuel leaks due to inadequate clearance between the crossfeed fuel lines and the firewall stiffener, which posed a significant fire hazard. The Federal Aviation Administration (FAA) previously issued AD 88-03-07 Amdt 39-5841, and this CASA directive aligns with that to ensure compliance with the revised service bulletin, MEB87-7 Revision 1, requiring additional inspections to mitigate these risks. This legislative instrument was enacted by CASA to uphold stringent aviation safety standards, ensuring that maintenance procedures are rigorously followed to prevent hazardous conditions. The policy objective is to safeguard the integrity of aircraft operations by addressing specific mechanical issues that could compromise flight safety. The requirement for compliance prior to the next maintenance release after 19 May 1988 underscores the urgency and importance of implementing these safety measures to protect both the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the safety and airworthiness of aircraft within Australian airspace. This regulation includes a detailed schedule of airworthiness directives, one of which pertains to Cessna 400 Series Aeroplanes. The directive AD/CESSNA 400/93 Amendment 1 mandates action concerning the crossfeed fuel lines in specific models of Cessna 414 aeroplanes with serial numbers ranging from 414-0001 to 414-0965. This requirement aligns with Cessna Service Bulletin No MEB87-7 Revision 1, and is also referenced by the FAA AD 88-03-07 Amendment 39-5841. Compliance with this directive is mandatory and must be achieved prior to the issue of the next Maintenance Release following 19 May 1988. The directive is necessitated by reports of fuel leaks caused by chafing of the crossfeed fuel lines, which pose a significant fire hazard. The directive aims to ensure proper clearance between the crossfeed fuel lines and the firewall stiffener, thereby mitigating this risk. The regulation's scope is limited to the specified models and serial numbers, with no additional exclusions or exemptions mentioned in this particular directive.

Key Provisions

The primary operative section of this legislation, specifically AD/CESSNA 400/93 Amendment 1, applies to Cessna 414 models with serial numbers ranging from 414-0001 to 414-0965. This directive requires adherence to the specifications outlined in Cessna Service Bulletin No MEB87-7 Revision 1, which was issued on 5 May 1988. The directive is applicable until the issuance of the next Maintenance Release following 19 May 1988. The requirement aims to address reports of fuel leaks due to chafing of the crossfeed fuel lines and to ensure there is adequate clearance between the crossfeed fuel lines and the firewall stiffener, thereby mitigating the risk of fire caused by fuel leakage. This directive references FAA AD 88-03-07 Amendment 39-5841. The obligations imposed by this legislation on the parties or entities it governs include ensuring compliance with the specified maintenance actions as outlined in the Cessna Service Bulletin. Owners and operators of affected aircraft must undertake the required inspections and corrective actions to maintain the airworthiness of the aircraft. They must ensure that the crossfeed fuel lines are inspected for proper clearance and any necessary adjustments are made before the specified compliance date. Furthermore, documentation of these inspections and any corrective actions must be maintained and made available for review by the Civil Aviation Safety Authority. Failure to comply with the provisions of this Airworthiness Directive can result in serious consequences. The Civil Aviation Regulations 1998 outline various offences and penalties for non-compliance. In cases where the requirements are not met, the aircraft may be deemed unairworthy, leading to potential grounding. Operators may face administrative penalties, including fines and other regulatory actions. In severe cases, where non-compliance results in an accident or endangers safety, more severe criminal penalties could apply. The exact penalties depend on the specific circumstances and the severity of the non-compliance, but they are designed to ensure stringent adherence to safety standards.