AD/B747/191 - Engine Fire Detection

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, were introduced to ensure the safety and efficiency of civil aviation within the country. Part 39 of these regulations, specifically Schedule 105 concerning the Civil Aviation Safety Authority, sets out Airworthiness Directives to maintain and improve aircraft safety standards. One such directive, AD/B747/191, pertains to Boeing 747 series aeroplanes equipped with Rolls-Royce RB211-524G/H engines, addressing the problem of engine fire detection system failures that could potentially lead to delayed or improper responses by flight crews. This directive mandates the modification of the engine fire detection system to ensure timely warnings are given to the flight crew, thereby enhancing flight safety. The policy objective is to prevent failures in the engine fire detector system that could compromise the safety of the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Boeing 747 series aeroplanes equipped with Rolls-Royce RB211-524G/H engines and mandates modifications to the engine fire detection system. This directive is aimed at enhancing the safety of flight operations by ensuring that the fire detection system operates effectively, thereby preventing potential delays or inadequate responses from flight crews in the event of an engine fire. The requirement necessitates compliance by modifying the system in line with Boeing Alert Service Bulletin 747-26A2250 dated 26 June 1997. The directive is to be implemented at the next engine shop visit, but no later than 5 November 2003. It became effective on 5 November 1998 following reports of engine failures that compromised the fire detection system, which, if unaddressed, could result in severe safety implications during flight. This legislative instrument extends to the Commonwealth level, impacting entities and individuals operating Boeing 747 series aeroplanes with the specified engine type within Australia.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, include specific Airworthiness Directives (AD) for the safety and operational standards of aircraft. One such directive, AD/B747/191, pertains to Boeing 747 series aeroplanes fitted with Rolls-Royce RB211-524G/H engines. This directive mandates a modification to the engine fire detection system in line with Boeing Alert Service Bulletin 747-26A2250 dated 26 June 1997 (section 1). This requirement is essential to address an issue where a combuster burn-through event led to damage in the engine fire detection system, thereby failing to provide a fire warning on the flight deck. The directive is intended to prevent any future instances of the engine fire detector system not signalling a fire warning to the flight crew following a severe engine failure (section 2). The obligation imposed by this directive is that the engine fire detection system must be modified as specified in the Boeing Alert Service Bulletin, ensuring compliance with FAA AD 98-17-13 Amdt 39-10715 and Rolls-Royce PLC Service Bulletin RB.211-26-C101 (section 3). This modification must be carried out during the next engine shop visit, with a firm deadline of 5 November 2003. The directive is effective from 5 November 1998, meaning that any non-compliance after this date could result in significant safety risks. The directive's background highlights the importance of this modification, as failure to detect and warn of engine fires can lead to delayed or incorrect responses by the flight crew, potentially exacerbating the severity of an engine failure incident (section 4). Failing to comply with AD/B747/191 could result in severe consequences, including potential safety risks and legal ramifications. While the Civil Aviation Regulations do not explicitly state specific penalties for non-compliance with this directive, non-compliance with general airworthiness directives can lead to substantial civil or criminal penalties. Such penalties may include fines and potential grounding of the aircraft, as well as repercussions for the airline's operating certificate. The Australian Civil Aviation Safety Authority (CASA) has the authority to enforce these regulations and can take appropriate actions against entities that fail to adhere to airworthiness directives, ensuring the highest safety standards in the aviation industry (section 5).