COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
CFM International Turbine Engines - CFM56 Series
AD/CFM56/13 Accessory Gear Box - Starter Gear Replacement
10/98
DM
Applicability: CFM International (CFMI) CFM56-3, -3B and -3C model turbofan engines identified and listed in Table 1 of CFMI Service Bulletin 72-877 Revision 1 and installed on Boeing 737 and other aeroplanes.
Requirement: Replace the starter gear (line 5) in the accessory gearbox (AGB) of applicable engines in accordance with CFMI Service Bulletin 72-877 Rev 1.
Note: DGAC 98-198(B)R1 dated 01 July 1998 refer.
Compliance: 1. For aircraft with two applicable engines fitted, perform above requirement on one engine before 1 October 1998.
2. For aircraft which have only one applicable engine, perform above action before 1 February 1999.
This airworthiness directive becomes effective on 29 July 1998.
Background: Two in flight shut downs were experienced due to a failure of the starter gear (line5) in the AGB.
Overview
The Civil Aviation Regulations 1998, as amended through the legislative instrument F2006B08518, addresses issues of airworthiness and safety in aviation. Specifically, Part 39, Section 106, establishes a schedule of airworthiness directives to ensure the safety of aircraft operations. This instrument was enacted by the Australian Government to maintain high standards of air safety and to ensure compliance with international aviation safety standards. One such directive, AD/CFM56/13, pertains to the replacement of the starter gear in the accessory gearbox of CFM International CFM56-3, -3B, and -3C model turbofan engines. This directive was introduced to address the problem of in-flight shutdowns caused by failures in the starter gear, as evidenced by incidents reported in CFM International Service Bulletin 72-877 Rev 1. The policy objective is to mitigate the risk of engine failure and enhance the overall safety of aircraft operations involving these engines.
Scope and Application
The Civil Aviation Regulations 1998, as amended, pertain to the regulation and oversight of civil aviation in Australia and encompass various directives, including those issued by the Civil Aviation Safety Authority (CASA). Specifically, Part 39 - 106 of the Civil Aviation Regulations addresses airworthiness directives, which are mandatory requirements designed to ensure the safety of aircraft. The scope of AD/CFM56/13 applies to CFM International (CFMI) CFM56-3, -3B and -3C model turbofan engines, identified and listed in Table 1 of CFMI Service Bulletin 72-877 Revision 1 and installed on Boeing 737 and other aeroplanes. This directive requires the replacement of the starter gear in the accessory gearbox (AGB) of the applicable engines to mitigate the risk of in-flight shut downs due to starter gear failures. The directive applies to aircraft operators and maintenance providers who must comply with the specified timelines for completing the required maintenance actions. Compliance involves performing the replacement on one engine for aircraft with two applicable engines before 1 October 1998, and on the single engine for aircraft with one applicable engine before 1 February 1999. The directive became effective on 29 July 1998 and references DGAC 98-198(B)R1 dated 1 July 1998 for additional context.
Key Provisions
The Civil Aviation Regulations 1998, specifically under Part 39, Section 106, addresses airworthiness directives concerning CFM International Turbine Engines, notably the CFM56 series. One such directive, AD/CFM56/13, pertains to the replacement of the starter gear in the accessory gearbox (AGB) of certain CFM56-3, -3B, and -3C model turbofan engines. These engines must be installed on Boeing 737 and other specified aeroplanes as identified in Table 1 of CFMI Service Bulletin 72-877 Revision 1. The directive requires that the starter gear in the accessory gearbox be replaced in compliance with the detailed instructions provided in the referenced service bulletin.
Entities and operators governed by this Act must adhere to strict timelines for compliance with the airworthiness directive. For aircraft equipped with two applicable engines, the replacement of the starter gear must be completed on one engine before 1 October 1998. For aircraft with only one applicable engine, the replacement must be finished before 1 February 1999. The directive became effective on 29 July 1998, underscoring the urgency and importance of timely compliance to ensure air safety.
Failure to comply with the provisions of this airworthiness directive can lead to severe consequences. The directive is grounded in safety concerns following two in-flight shutdowns caused by failures in the starter gear of the accessory gearbox. Consequently, non-compliance not only risks operational safety but also invites scrutiny and potential enforcement actions under civil aviation regulations. The specific penalties for non-compliance are not detailed in the directive but could include fines, operational restrictions, or other regulatory measures designed to enforce adherence to safety standards.
In summary, AD/CFM56/13 mandates the replacement of the starter gear in the accessory gearbox of specified CFM56 series engines, with stringent timelines for compliance. The directive aims to mitigate safety risks associated with engine failures and underscores the necessity for operators to act promptly to avoid regulatory repercussions.