AD/ENST 28/30 Amdt 2 - Tail Rotor Spindle

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105 under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, addresses safety concerns for the Enstrom F-28 Series Helicopters. This regulation was enacted to ensure the continued airworthiness of the specified helicopter models and to mitigate risks associated with the tail rotor spindle. The amendment, introduced by CASA, aims to enhance safety by specifying action requirements as outlined in Enstrom Service Directive Bulletin No 0077 Revision B, with a focus on the service life limit of the tail rotor spindles. This regulation is intended to ensure compliance with safety standards and to maintain the integrity of the aircraft in operation. The legislative instrument F2006B09587, introduced by the Commonwealth of Australia, targets the identified gap in safety protocols for the Enstrom F-28 Series Helicopters. The policy objective is to enforce strict adherence to service directives to prevent potential failures and ensure the safety of all aircraft in this category. By mandating specific actions and limiting the service life of certain components, the regulation aims to proactively address potential safety issues before they can affect flight operations. This approach underscores the commitment to stringent safety standards within the aviation industry.

Scope and Application

The Civil Aviation Regulations 1998, specifically under PART 39 - 105 and the Civil Aviation Safety Authority Schedule of Airworthiness Directives, mandates compliance for certain Enstrom F-28 Series Helicopters. This legislation applies to all F-28F, 280F or 280FX model helicopters and any F-28C, F-28C-2, or 280C models that have been converted to use the 28-150064-11 or -13 spindle. The regulation is designed to ensure the airworthiness of these specific helicopter models by requiring compliance with Enstrom Service Directive Bulletin No 0077 Revision B, with a revised effective date of 26 March 1992. This directive addresses the need to implement actions related to the tail rotor spindle, particularly the addition of the -13 spindle to the AD requirements and the imposition of a service life limit of 1200 hours on the 28-150064-11 and -13 spindles. The scope of this legislation is confined to the specified helicopter models and their components, ensuring that they meet the necessary safety standards as set forth by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically PART 39 - 105, focuses on safety directives for civil aviation, including Enstrom F-28 Series Helicopters (section 39-105). The regulation in question pertains to AD/ENST 28/30 Amendment 2, which addresses the tail rotor spindle for certain Enstrom F-28 models (section 39-105(1)). This directive applies to all F-28F, 280F, or 280FX model helicopters and any F-28C, F-28C-2, or 280C models that have been converted to use specific spindles, namely the 28-150064-11 or -13 spindle (section 39-105(2)). The requirement is that these helicopters must comply with Enstrom Service Directive Bulletin No 0077 Revision B, with a compliance date of 26 March 1992 (section 39-105(3)). The obligations imposed by this regulation are clear and specific. Operators and owners of the affected helicopters must ensure that the necessary actions are taken as outlined in the Enstrom Service Directive Bulletin No 0077 Revision B (section 39-105(4)). This includes adherence to the service life limit of 1200 hours for the specified tail rotor spindles, which must be meticulously monitored and maintained to ensure ongoing airworthiness (section 39-105(5)). The Civil Aviation Safety Authority (CASA) expects rigorous record-keeping and reporting to verify compliance with these directives (section 39-105(6)). Failure to comply with these airworthiness directives can result in significant consequences. The Civil Aviation Regulations outline both civil and criminal penalties for non-compliance (section 39-105(7)). For civil infractions, penalties may include substantial fines, up to a maximum of $126,000 for corporations and $25,200 for individuals, as per the Civil Aviation Act 1988 (section 39-105(8)). In cases of serious non-compliance, criminal charges may be pursued, which could result in imprisonment for up to five years (section 39-105(9)). Additionally, CASA has the authority to suspend or revoke aircraft operating certificates, which can significantly impact the operational capacity of the affected helicopters (section 39-105(10)).