AD/B727/100 Amdt 3 - Elevator Rear Spar

Overview

The Civil Aviation Regulations 1998, as amended through F2006B02623, specifically address issues pertinent to the airworthiness of Boeing 727 series aeroplanes. This legislation was introduced to tackle the problem of fatigue cracking in the elevator rear spar of these aircraft, a concern that was identified through multiple reports of structural integrity issues. The Australian Government, through the Civil Aviation Safety Authority, implemented this directive to ensure compliance with the technical requirements set forth by the Federal Aviation Administration (FAA) to maintain the safety and reliability of the Boeing 727 in operation. The overarching policy objective is to mitigate the risk of in-flight failures by mandating specific inspections and, where necessary, structural modifications to the affected aircraft. This legislative instrument aims to ensure that all operators of Boeing 727 series aeroplanes adhere to stringent airworthiness standards, thereby safeguarding passenger safety and operational integrity. The directive is a response to emerging data on structural weaknesses, specifically targeting the interference between the spar flange bend radii and the shear plates, which had been identified as a primary source of cracking. Through this regulation, the Australian Government reinforces its commitment to maintaining high safety standards in the national aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, pertains to the Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA) for Boeing 727 series aeroplanes, particularly those with line numbers ranging from 1 to 1832. This legislation mandates adherence to the technical requirements outlined in FAA AD 96-06-05 Amdt 39-9542, with a compliance date of 18 July 1996. The directive addresses issues of fatigue cracking in the elevator rear spar, which was believed to be caused by interference between the spar flange bend radii and the sharp edges of shear plates mounted between the spar and the elevator tab hinges. This applies to all operators of Boeing 727 aircraft within the specified line numbers, ensuring their continued airworthiness and safety in accordance with CASA's regulations. The Act's scope extends to requiring actions specified in the Requirement Document, with amendments clarifying compliance and enhancing safety measures based on recent reports of cracking both domestically and internationally.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, detail the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives (AD) for Boeing 727 Series Aeroplanes. AD/B727/100 Amendment 3 (AD/B727/100 Amdt 3) pertains to the Elevator Rear Spar, which is applicable to Model 727 series aircraft with line numbers from 1 through 1832. This directive requires compliance with the technical requirements outlined in the Federal Aviation Administration (FAA) AD 96-06-05 Amendment 39-9542. The directive mandates actions to address reported cases of fatigue cracking in the elevator rear spar, believed to be initiated by interference between the spar flange bend radii and sharp edges on shear plates. The obligations imposed by AD/B727/100 Amdt 3 include conducting inspections and taking corrective actions as specified in the Requirement Document, with an effective date of 18 July 1996. Operators of the affected Boeing 727 aircraft must ensure that inspections are performed to detect any cracks and loose brackets in the elevator rear spar, as well as to implement the terminating modification as prescribed by the FAA directive. The directive emphasises the importance of maintaining the structural integrity of the aircraft to ensure safety in flight operations. Failure to comply with AD/B727/100 Amdt 3 can result in severe consequences. Non-compliance with airworthiness directives can lead to enforcement actions by CASA, which may include fines, suspension or revocation of air operator certificates, and legal proceedings against the operators. The maximum penalties for such violations are significant, reflecting the critical nature of ensuring aircraft airworthiness. Ensuring adherence to these directives is essential to maintain the safety standards required by Australian and international aviation regulations.