COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Boeing 747 Series Aeroplanes
AD/B747/242 Trailing Edge Flap H-11 Bolts 5/2001
Applicability: All Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D,
-400F, and 747SR series aircraft.
Requirement: Action in accordance with the technical requirements of FAA AD 2001-03-10 Amdt 39-12114.
Note: Boeing Service Bulletin 747-27A2376 refers.
Compliance: As specified in the Requirement document with a revised effective date of 17 May 2001.
This Airworthiness Directive becomes effective on 17 May 2001.
Background: The FAA requires an inspection to determine whether H-11 steel bolts are installed as attach and support bolts at the trailing edge flap transmissions, and replacement of any H-11 steel bolt with an Inconel bolt. The required actions are intended to prevent loss of a flap transmission, which could reduce lateral controllability of the aircraft.
David Alan Villiers
Delegate of the Civil Aviation Safety Authority 2 April 2001
The above AD is notified in the Commonwealth of Australia Gazette on 18 April 2001.
Overview
The Civil Aviation Regulations 1998, specifically under Part 39 - 105, include an Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA). This directive was enacted to address an unsafe condition identified with the trailing edge flap H-11 bolts in Boeing 747 series aeroplanes. The problem that this directive aims to correct is the potential for loss of a flap transmission, which could significantly impair the lateral controllability of the aircraft. By mandating the replacement of H-11 steel bolts with Inconel bolts, the directive seeks to enhance the safety and reliability of the aircraft in question. This measure aligns with the broader policy objective of ensuring that civil aviation operations meet the highest standards of safety, as overseen by the Australian Government through CASA.
Scope and Application
The Civil Aviation Regulations 1998, specifically under Part 39 - 105, mandate that all Boeing 747 series aeroplanes including models 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, and 747SR, must comply with the Airworthiness Directive AD/B747/242. This directive, issued by a delegate of the Civil Aviation Safety Authority (CASA), requires adherence to the technical specifications outlined in FAA AD 2001-03-10 Amdt 39-12114, with reference to Boeing Service Bulletin 747-27A2376. The directive mandates that all affected H-11 steel bolts at the trailing edge flap transmissions must be inspected and, if necessary, replaced with Inconel bolts to prevent any loss of flap transmission which could compromise lateral controllability. The directive became effective on 17 May 2001, and compliance must be achieved in accordance with the specified requirements and timeframe. This legislation applies to all relevant aircraft operating within the Commonwealth of Australia, ensuring adherence to stringent safety standards for civil aviation.
Key Provisions
The Civil Aviation Regulations 1998 (CAR 1998) establish a framework for ensuring the safety and airworthiness of aircraft in Australia. Under Part 39, the Civil Aviation Safety Authority (CASA) has the authority to issue Airworthiness Directives (ADs) to address safety issues. Specifically, subregulation 39.1(1) allows the CASA delegate to issue ADs that mandate corrective actions for identified unsafe conditions on certain aircraft types. The AD discussed here, AD/B747/242, pertains to Boeing 747 Series aeroplanes and addresses the need to inspect and, if necessary, replace trailing edge flap H-11 bolts to prevent potential loss of flap transmission and ensure lateral controllability.
The AD/B747/242 requires specific actions to be taken on all Boeing 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, and 747SR series aircraft. According to the requirement section of the AD, the action must be in line with the technical requirements outlined in FAA AD 2001-03-10 Amdt 39-12114, and it references Boeing Service Bulletin 747-27A2376. The compliance section specifies that these actions must be completed by 17 May 2001, as stipulated in the requirement document, with a revised effective date of 17 May 2001. The directive itself becomes effective on 17 May 2001.
Entities governed by this AD, such as aircraft operators and maintenance providers, have several obligations. They must ensure that all applicable Boeing 747 series aircraft undergo the specified inspection and corrective actions to replace any H-11 steel bolts with Inconel bolts, as required by the AD. This includes conducting a thorough inspection to determine the condition of the H-11 bolts and replacing any defective bolts to prevent potential loss of flap transmission. Additionally, operators must maintain records of compliance with the AD, ensuring that all required actions are documented and that the aircraft are maintained in a safe and airworthy condition.
Failure to comply with the AD/B747/242 may result in significant consequences. Under the CAR 1998, non-compliance can lead to enforcement actions by CASA, which may include fines, suspension or revocation of airworthiness certificates, or other regulatory measures. The seriousness of non-compliance underscores the importance of adhering to the AD to ensure the safety and airworthiness of the affected aircraft.