According to the notice, the US Federal Aviation Administration will issue a new airworthiness order for the Boeing 757-300 series aircraft. The background of the introduction of this directive is that crack expansion analysis shows that existing maintenance plan data and supplementary structural inspection items cannot provide sufficient inspection opportunities, making it difficult to detect cracks caused by damaged safety strings at the joints of the fuselage frame sharing the upper frame surrounding the uppermost fastener. The Airworthiness Directive requires inspection or verification of maintenance records on existing repair sites and the execution of repeated inspections. The order came into effect on November 5.

According to the notice, the US Federal Aviation Administration will issue a new airworthiness order for the Boeing 757-300 series aircraft. The background of the introduction of this directive is that crack expansion analysis shows that existing maintenance plan data and supplementary structural inspection items cannot provide sufficient inspection opportunities, making it difficult to detect cracks caused by damaged safety strings at the joints of the fuselage frame sharing the upper frame surrounding the uppermost fastener. The Airworthiness Directive requires inspection or verification of maintenance records on existing repair sites and the execution of repeated inspections. The order came into effect on November 5.