AD/BELL 212/37 Amdt 1 - Main Rotor Pillow Block

Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority, is a pivotal piece of legislation aimed at ensuring the safety of civil aviation in Australia. One of its critical components is Part 39 - 105, which sets forth the schedule of airworthiness directives for various aircraft, including Bell Helicopter Textron 212 Series Helicopters. Specifically, AD/BELL 212/37 Amendment 1 pertains to the main rotor pillow block, addressing a critical safety concern identified by the manufacturer. The primary problem this directive seeks to resolve is the potential failure of the main rotor pillow block, which can compromise the safety and integrity of the helicopter. The objective of this directive is to mandate actions to prevent such failures by adhering to the manufacturer’s service bulletin SB No 212-87-43 Rev “A”. The compliance timeline is stringent, requiring inspections and modifications within specific hours of time in service to mitigate any risk associated with the identified issue. The enforcement of these airworthiness directives is a collaborative effort between the Civil Aviation Safety Authority and the helicopter operators, ensuring that the safety standards are upheld to protect both the aircraft and those on board. The policy objective is clear: to maintain the highest standards of aviation safety through proactive measures and adherence to manufacturer-specific directives. The inclusion of specific helicopter serial numbers in the directive ensures targeted and effective implementation, addressing the problem directly and efficiently.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, as amended, apply to all Bell Helicopter Textron 212 Series helicopters with serial numbers between 30501 to 31285, 32101 to 32142, and 32201 to 32262. This legislation mandates actions in accordance with Bell Alert Service Bulletin No 212-87-43 Rev "A," which pertains to the maintenance and modification of the main rotor pillow block. The requirement to comply with Part I of the requirement document must be met within 25 hours of time in service after 15 May 1987, and subsequently at intervals not exceeding 25 hours of time in service until the helicopter is modified in accordance with Part II of the requirement document. Part II requires compliance within 300 hours of time in service after 15 May 1987 or before 30 June 1987, whichever comes first. This regulation is intended to address the identified issue of loss of torque on the retaining nut, which was a contributing factor in the failure of a pillow block.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, specifically AD/BELL 212/37 Amendment 1, pertain to the safety requirements for Bell Helicopter Textron 212 Series Helicopters (section 105). This amendment mandates action concerning the main rotor pillow block, which is a critical component of the helicopter's rotor system. The requirement is to adhere to Bell Alert Service Bulletin No 212-87-43 Revision "A". This involves inspecting and potentially modifying the main rotor pillow block to address a known issue related to the loss of torque on the retaining nut, which could lead to failure. The obligations imposed by this legislation on the parties governed by it, specifically helicopter operators and maintenance personnel, are stringent and time-bound. Operators must ensure that the specified actions are carried out within the prescribed timeframes. For instance, Part I of the requirement document mandates that inspections and modifications must be completed within 25 hours of time in service after 15 May 1987, and subsequently at intervals not exceeding 25 hours of time in service until the modifications specified in Part II are completed. Part II requires the actions to be taken within 300 hours of time in service after 15 May 1987 or before 30 June 1987, whichever comes first. Failure to comply with the directives outlined in the Civil Aviation Regulations 1998 can lead to significant legal and safety repercussions. Although specific offences, penalties, and consequences are not detailed in the provided text, non-compliance with airworthiness directives typically results in regulatory action by the Civil Aviation Safety Authority (CASA). Such actions may include fines, grounding of the aircraft, or other enforcement measures to ensure safety standards are met. The maximum penalties for non-compliance can be substantial and may include fines up to the regulatory maximum as stipulated by CASA. Additionally, operators may face criminal charges if the non-compliance results in an aviation accident or incident.