COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Pratt and Whitney Turbine Engines - JT8D Series
AD/JT8D/5 Sixth Stage Compressor Disc 6/70
Applicability: All JT8D series engines incorporating sixth stage compressor disc P/N 586906 (wide rim).
Requirement: 1. Inspect and rework as necessary the sixth stage compressor disc P/N 586906 (wide rim) in accordance with the requirements of the JT8D Overhaul Manual, Inspection Section 72-33-2, Page 301, Paras. 1 to 5 as amplified by Pratt & Whitney Service Telegram SE : RWJ : 9-6-24-1 dated 24 June 1969. Alternatively replace the disc by a serviceable disc of the same or later part number.
Note: For the purposes of this Airworthiness Directive a blade failure is defined as one in which any portion of the blade root is separated from the blade.
2. AD/PW-T/28.
Compliance: Before further flight following a sixth stage blade failure.
Overview
The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes Airworthiness Directives (AD) such as AD/JT8D/5, which was enacted to address issues related to Pratt and Whitney Turbine Engines, particularly the JT8D series with respect to the sixth stage compressor disc. This directive applies to all JT8D series engines that include the specified sixth stage compressor disc part number 586906 (wide rim). The objective of this legislation is to ensure the safety and reliability of these engines by mandating specific inspection and maintenance procedures. The requirement is for an inspection and necessary reworking of the sixth stage compressor disc in line with detailed instructions from the JT8D Overhaul Manual and Pratt & Whitney Service Telegram SE : RWJ : 9-6-24-1, or alternatively, the replacement of the disc with a serviceable one of the same or a later part number. The enacting body is the Commonwealth of Australia, and the overarching policy objective is to maintain stringent safety standards in civil aviation.
This AD is particularly significant in preventing blade failures, which are defined as any separation of the blade root from the blade. Compliance with this directive is mandatory before further flight operations following a blade failure, ensuring that any detected issues are promptly and appropriately addressed to prevent potential safety hazards.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 106 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all JT8D series turbine engines that incorporate the sixth stage compressor disc P/N 586906 (wide rim). This regulation is a Commonwealth legislative instrument designed to ensure the safety and airworthiness of aircraft engines in Australia and beyond, as it falls under the national jurisdiction of the Civil Aviation Safety Authority. The Act mandates that operators of affected engines must inspect and rework the specified compressor disc according to the requirements outlined in the JT8D Overhaul Manual and Pratt & Whitney Service Telegram, or replace the disc with a serviceable one of the same or later part number. Furthermore, it stipulates that a compliance check must be performed following any incident of blade failure to prevent further flight until the necessary measures are taken. The directive applies comprehensively to all entities operating within Australia's national airspace, ensuring a uniform standard of safety across the industry.
Key Provisions
The primary operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 106, require compliance with the Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA). In this case, AD/JT8D/5 focuses on Pratt and Whitney Turbine Engines, particularly the JT8D Series, concerning the sixth stage compressor disc. The directive mandates that all JT8D series engines incorporating the sixth stage compressor disc with part number 586906 (wide rim) must undergo inspection and necessary rework or replacement (Regulation 39.106). This must be done in accordance with the JT8D Overhaul Manual, Inspection Section 72-33-2, Pages 301, Paragraphs 1 to 5, as further clarified by Pratt & Whitney Service Telegram SE : RWJ : 9-6-24-1 dated 24 June 1969. If any portion of the blade root separates from the blade, it is considered a blade failure, necessitating compliance with AD/PW-T/28.
The obligations imposed by the Act on the entities governed by these regulations are stringent and clearly defined. Operators of JT8D series engines must ensure that the specified compressor discs are inspected and either reworked or replaced according to the outlined procedures. This includes adhering to the detailed inspection criteria and rework requirements provided in the referenced documentation. Furthermore, in the event of a blade failure, the operator must comply with the additional requirements stipulated in AD/PW-T/28 before the engine can be used for further flight. This ensures that the engines maintain their airworthiness and comply with safety standards set by CASA.
Failure to comply with these regulations can result in significant consequences. The Civil Aviation Regulations 1998 impose strict penalties for non-compliance with Airworthiness Directives. Violations can lead to enforcement actions by CASA, which may include fines, suspension of operations, or other regulatory measures. The exact penalties are not specified within the provided text but are typically outlined in other sections of the Civil Aviation Act 1988 and related regulations. The seriousness of these penalties underscores the importance of adhering to the stipulated requirements to ensure safety and regulatory compliance in aviation operations.