AD/S-PUMA/17 - Main Gearbox Epicyclic Module Upper Casing Bearing Attachment Bolts

Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, provide a comprehensive framework for ensuring the safety and regulation of civil aviation within Australia. Specifically, Part 39 of these regulations deals with Airworthiness Directives, which are regulatory measures issued by the Civil Aviation Safety Authority to ensure the safe operation of aircraft. One such directive, AD/S-PUMA/17, targets the Eurocopter AS 332 (Super Puma) Series Helicopters, addressing an issue with the Main Gearbox Epicyclic Module Upper Casing Bearing Attachment Bolts. This directive was introduced to mitigate the risk identified during the overhaul of a gearbox module, where overlength bolts were discovered and could potentially interfere with the second stage planet gear web, posing a safety hazard. The directive references the French DGAC AD 93-131-051 (B) R1.5/95DM as the requirement document for compliance, ensuring that all AS 332 C, C1, L and L1 helicopters equipped with the specified gearbox module parts adhere to the specified safety standards. The policy objective behind AD/S-PUMA/17 is to ensure the continued airworthiness and safety of the affected helicopter models by rectifying a potential design flaw. This directive exemplifies the Civil Aviation Safety Authority’s commitment to proactive safety management by requiring specific actions to be taken in response to identified risks. By mandating adherence to the detailed requirements outlined in the referenced document, the directive aims to prevent mechanical failures and enhance the overall safety of civil aviation operations involving these helicopter models.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the applicability of the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which includes directives concerning Eurocopter AS 332 (Super Puma) Series Helicopters. This particular directive, AD/S-PUMA/17, pertains to the Main Gearbox Epicyclic Module Upper Casing Bearing Attachment Bolts. It applies to all AS 332 C, C1, L, and L1 helicopters equipped with the epicyclic module P/N 332A32-2007-00 or 332A32-2007-01. The directive mandates actions in accordance with French DGAC AD 93-131-051 (B) R1.5/95DM, with compliance details outlined in the Requirement Document available from a Regional District Office of the Civil Aviation Authority. The directive was prompted by findings of overlength bolts installed in the upper casing bearing assembly during gearbox overhauls, which could potentially interfere with the second stage planet gear web. This regulation extends across the Commonwealth of Australia, ensuring a uniform standard of safety and compliance among all relevant helicopter operators.

Key Provisions

The Civil Aviation Regulations 1998, specifically within PART 39 - 105, addresses the airworthiness directives pertinent to certain helicopter models. In this context, the regulation under consideration concerns the Eurocopter AS 332 (Super Puma) series helicopters. The particular directive, AD/S-PUMA/17, pertains to the Main Gearbox Epicyclic Module Upper Casing Bearing Attachment Bolts (section 1). The directive applies to all AS 332 C, C1, L, and L1 helicopters equipped with the epicyclic module parts numbers 332A32-2007-00 or 332A32-2007-01 (section 2). The directive mandates that actions be taken in accordance with the French DGAC AD 93-131-051 (B) R1.5/95DM, which is detailed in the Requirement Document. This document can be obtained from a Regional District Office of the Civil Aviation Authority (section 3). Compliance with the directive is to be achieved as specified in this Requirement Document, ensuring that all necessary modifications and inspections are conducted properly (section 4). The directive is triggered by instances where overlength bolts were discovered during the overhaul of a gearbox module, posing a potential risk of interference with the second stage planet gear web (section 5). Entities governed by this directive must ensure that they adhere to the specified requirements outlined in the Requirement Document. This involves inspecting the upper casing bearing attachment bolts to ensure they meet the correct specifications, and taking corrective actions if any overlength bolts are found (section 6). Additionally, operators must maintain accurate records of all actions taken to comply with the directive, as well as any inspections and repairs carried out on the affected helicopters (section 7). Failure to comply with the airworthiness directive may result in serious safety hazards, potentially leading to mechanical failures and accidents (section 8). Violating the provisions of this airworthiness directive may result in significant legal and financial consequences. Under the Civil Aviation Act 1988, non-compliance can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Potential penalties include fines, operational restrictions, and, in severe cases, the grounding of non-compliant aircraft (section 9). The maximum penalties for non-compliance can be substantial, reflecting the critical nature of maintaining airworthiness standards to ensure the safety of all passengers and crew on board the affected helicopters (section 10). It is imperative for all relevant parties to strictly adhere to the directive to avoid these serious repercussions.