COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters
AD/HU 369/59
Amdt 1
Main Transmission Oil Lines 7/87
Applicability: All model 369D, 369E, 369F and 369FF helicopters fitted with rigid oil lines in the main transmission cooling installation.
Requirement: 1. Inspect in accordance with Hughes Service Information Notice EN-10 and DN- 124, Part 1.
2. Action in accordance with Hughes Service Information Notice DN-145, EN-33 and FN-22.
Compliance: For Part 1: Within 100 hours time in service after 30 June 1987 and thereafter at intervals not exceeding 100 hours time in service until modified in accordance with Part 2 of the Requirement.
For Part 2: Whenever damaged rigid lines need to be replaced or at the next main transmission overhaul after 30 June 1987 whichever occurs first.
Background: The manufacturer considers it necessary to introduce a periodic inspection of the subject oil lines for chafing damage which could ultimately cause the loss of oil feed to the transmission. This Directive has been amended to increase the applicable aircraft and introduce the modification which replaces rigid lines with flexible lines.
Overview
The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B10722, specifically address the safety of McDonnell Douglas (Hughes) and Kawasaki 369 Series helicopters through the Airworthiness Directive AD/HU 369/59 Amendment 1. This directive was introduced to address the identified problem of chafing damage to the main transmission oil lines, which could lead to a loss of oil feed to the transmission, posing a significant safety risk. The objective of the legislation is to ensure that all relevant helicopters are inspected and, where necessary, modified to prevent such failures. The amendment requires the replacement of rigid oil lines with flexible lines to mitigate the risk of chafing damage, thereby enhancing the overall safety and reliability of the aircraft. Compliance with these requirements is mandatory, with inspections to be conducted at specified intervals and modifications to be made at the earliest opportunity.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, issued under the authority of the Civil Aviation Safety Authority, address the airworthiness directives for certain models of McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters. This legislation applies to all model 369D, 369E, 369F and 369FF helicopters equipped with rigid oil lines in the main transmission cooling installation. The directive mandates inspections and specific actions to ensure the integrity of these oil lines to prevent potential failures that could compromise the helicopter's transmission system. Compliance with these directives is critical for maintaining airworthiness and safety standards. Inspections must be conducted in accordance with specified service information notices at prescribed intervals, with modifications to replace rigid lines with flexible ones to be implemented as per the directive's requirements. This regulation ensures that affected helicopters are maintained to a high safety standard and is applicable nationwide within the Commonwealth of Australia.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105 under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, outlines a crucial directive for certain McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters (sections 39 and 105). The directive, AD/HU 369/59 Amendment 1, pertains to the main transmission oil lines and is applicable to all model 369D, 369E, 369F, and 369FF helicopters equipped with rigid oil lines in the main transmission cooling installation. This directive was issued on 7/87 to address the necessity for regular inspection and, where necessary, replacement of these oil lines to prevent potential catastrophic failure.
The directive mandates two primary requirements. Firstly, inspections must be conducted in accordance with Hughes Service Information Notices EN-10 and DN-124, Part 1 (section 1). These inspections are intended to detect any chafing or other damage to the rigid oil lines, which could compromise the integrity of the oil feed to the transmission. Secondly, if any damage is identified, corrective actions must be taken in line with Hughes Service Information Notices DN-145, EN-33, and FN-22 (section 2). These actions may involve replacing the damaged lines or implementing modifications to mitigate the risk of oil loss.
Compliance with this directive is structured to ensure regular and timely maintenance. For Part 1 of the requirement, inspections must occur within 100 hours of time in service after 30 June 1987 and subsequently at intervals not exceeding 100 hours of time in service until the modification outlined in Part 2 is implemented. For Part 2, replacement or modification must be carried out whenever damaged rigid lines are detected or at the next main transmission overhaul after 30 June 1987, whichever comes first. This structured approach aims to maintain the airworthiness and safety of the affected helicopters.
Failure to comply with the requirements of this directive may result in significant safety risks, as the loss of oil feed to the transmission could lead to severe mechanical failure during flight. The legislation does not explicitly state penalties for non-compliance within the text provided, but non-compliance with CASA directives generally can lead to enforcement actions, including fines, grounding of the aircraft, and potential criminal charges. The specific penalties would depend on the severity of the breach and the subsequent actions taken by CASA.