Overview

The Civil Aviation Regulations 1998 (CAR 1998) were enacted to regulate civil aviation in Australia, ensuring the safety and efficiency of the nation's airspace. One of the critical aspects of these regulations is the implementation of Airworthiness Directives (ADs), which are designed to address specific safety concerns in civil aircraft. The AD/R44/14 issued by the Civil Aviation Safety Authority (CASA) in June 2000, is an example of such measures, specifically targeting Robinson R44 Series Helicopters to prevent unsafe conditions. This directive was introduced in response to reports of incidents where the wire harness came into contact with the fuel line assembly, leading to potential chafing and fire hazards. The policy objective behind this AD is to ensure the continued airworthiness of the affected helicopters by mandating inspections, repairs, and modifications to prevent such unsafe conditions from occurring.

Scope and Application

This Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998 pertains specifically to the Robinson R44 Series helicopters with serial numbers ranging from 0002 through 0462. The directive mandates specific actions to prevent contact between the wire harness and the fuel line assembly, addressing a known safety concern. This action is required within 100 hours of time in service or 90 calendar days after the effective date of the AD, whichever occurs first. The directive's requirements include inspecting the wire harness and fuel line assembly for contact and chafing, replacing the fuel line assembly if necessary, and installing spiral wrap tubing on the fuel line assembly to prevent future chafing. This AD applies nationally within Australia and is enforced by CASA, with the ultimate aim of mitigating the risk of fire due to wire chafing.

Key Provisions

This Airworthiness Directive (AD), issued by the Civil Aviation Safety Authority (CASA), applies specifically to Robinson R44 Series helicopters with serial numbers ranging from 0002 through 0462 (AD/R44/14). The primary objective of this AD is to address the risk of contact between the wire harness and the fuel line assembly, which could potentially lead to chafing and a fire hazard. To mitigate this risk, the AD mandates a series of actions to be carried out under specific conditions. Firstly, the cover part number (P/N) C474-1 between the rear seatbacks must be removed, and the wire harness P/N C059 and the fuel line assembly P/N C726-2 above the fuel shutoff valve must be inspected for any contact. If such contact is identified, it must be further inspected for chafing. If chafing is detected, the fuel line must be replaced with an airworthy fuel line assembly, and the fuel line nuts must be torqued to the specified range of 12.4-14.7 Nm (110-130 in-lbs). Additionally, a 75 mm (3 in) section of spiral wrap tubing P/N B161-8 must be installed on the fuel line assembly to prevent future contact. These actions must be completed within 100 hours of time in service or 90 calendar days from the effective date of this Directive, whichever comes first. The AD imposes certain obligations on the parties or entities it governs. These obligations include the inspection of specified components, removal and replacement of parts if necessary, and the installation of additional protective measures. The compliance period for these actions is critical, requiring prompt attention to ensure the safety of the aircraft. Additionally, the AD references related documentation, including Robinson Helicopter Company Service Bulletin SB-31 and United States Federal Aviation Administration (FAA) Advisory Circular 43.13-1B, Chapter 11, to provide further guidance on the procedures and requirements for the specified actions. Failure to comply with this Airworthiness Directive may result in serious safety implications. While the AD itself does not explicitly state specific penalties, non-compliance with CASA directives generally can lead to serious consequences under the Civil Aviation Safety Regulations 1998. Such consequences may include civil penalties for non-compliance, enforcement actions by CASA, and potential grounding of the aircraft until the required actions are completed. The gravity of the potential fire hazard and the mandated safety measures underscore the importance of adhering to the directive to ensure the continued airworthiness and safety of the affected Robinson R44 Series helicopters.