COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 747 Series Aeroplanes
AD/B747/24 Rear Fuselage Stringers S18 and S19 - Modification 12/80
Applicability: All models listed in Boeing SB 747-53-2114 under groups I and II and those under group III if engines of thrust greater than 50000 lb. are installed.
Document: 1. FAA AD 80-20-01 Amdt. 39-3927; or
2. Boeing SB 747-53-2114, Rev. 3.
Compliance: Prior to 31 January 1981. As per requirement document No. 1.
Background: With installed thrust greater than 50000 lb., failure of an outer engine would require extreme rudder trim, causing excessive loads to be applied to stringers 18 and 19 in the rear fuselage. The Directive requires local reinforcement of these stringers by nesting a radius filler inside.
Overview
The Civil Aviation Regulations 1998, which are administered by the Civil Aviation Safety Authority (CASA), were enacted to provide a regulatory framework for ensuring the safety of civil aviation within Australia. One particular legislative instrument under this act, F2006B03138, pertains to Boeing 747 series aeroplanes, specifically addressing modifications to the rear fuselage stringers S18 and S19. This directive was introduced to mitigate risks associated with excessive loads applied to these stringers in the event of an engine failure with thrust exceeding 50,000 lb. The policy objective is to ensure the structural integrity of these critical components to maintain the safety of the aircraft in operation. Compliance with this directive was required prior to 31 January 1981, as stipulated in the FAA AD 80-20-01 Amendment or Boeing Service Bulletin 747-53-2114, Revision 3, to prevent potential structural failures that could compromise flight safety.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to the Airworthiness Directives concerning Boeing 747 Series aeroplanes, focusing on the modification of rear fuselage stringers S18 and S19. This regulation mandates that all models listed in Boeing SB 747-53-2114 under groups I and II, as well as those under group III if equipped with engines of thrust greater than 50,000 lb, must comply with the specified modifications. These directives necessitate the reinforcement of the rear fuselage stringers to prevent excessive loads resulting from extreme rudder trim in the event of an outer engine failure, thus ensuring the aircraft's safety. The compliance date for these modifications is set prior to 31 January 1981, as outlined in FAA AD 80-20-01 Amdt. 39-3927 or Boeing SB 747-53-2114, Rev. 3. This regulation applies nationally across Australia, overseen by the Civil Aviation Safety Authority, and is intended to maintain the highest safety standards in commercial aviation.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, contain the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives for Boeing 747 Series Aeroplanes. This includes AD/B747/24, which mandates modifications to the rear fuselage stringers S18 and S19 (section 12/80). The directive applies to all models listed in Boeing SB 747-53-2114 under groups I and II, and those under group III if they have engines with thrust greater than 50,000 lb. (section 1). Compliance must be achieved before 31 January 1981, as specified in requirement document No. 1 (section 2). The directive is grounded in the need to prevent excessive loads on the stringers from extreme rudder trim resulting from a failed outer engine, particularly for those with thrust greater than 50,000 lb. (section 3).
The obligations imposed by this Act include ensuring that the specified models of Boeing 747 aeroplanes are modified to reinforce the rear fuselage stringers S18 and S19. This reinforcement must be achieved by nesting a radius filler inside the stringers to prevent structural failure due to excessive loads (section 4). Compliance with the directive must be demonstrated before the specified date, and the modifications must adhere to the requirements outlined in FAA AD 80-20-01 Amdt. 39-3927 or Boeing SB 747-53-2114, Rev. 3 (section 2). Operators of these aircraft are required to maintain records of compliance and ensure that the modifications are carried out by qualified personnel in accordance with the specified documentation (section 5).
Failure to comply with this directive can result in serious civil and criminal consequences. The penalties for non-compliance can include substantial fines and potential criminal charges. The specific maximum penalties are not detailed in the provided text but are generally in line with other aviation safety regulations, which can include fines of up to several hundred thousand dollars and imprisonment for individuals found guilty of negligence or failure to comply with safety directives (section 6). The severity of the consequences underscores the importance of adhering to the requirements outlined in the directive to ensure the continued airworthiness and safety of the Boeing 747 aeroplanes (section 7).