EASA AD US-2018-16-05: Superseded by FAA AD 2020-21-17

What to do

Operators of affected Boeing 757 airplanes must perform the required repetitive inspections for skin cracking, shim migration, diagonal brace cracking, and fastener looseness as specified in FAA AD 2018-16-05. Corrective actions must be taken when discrepancies are found. Compliance with this AD became effective on September 10, 2018, and operators should refer to the specified Boeing service information for detailed procedures.

Summary

FAA Airworthiness Directive 2018-16-05 is a final rule addressing certain Boeing Model 757 airplanes. It mandates repetitive inspections for skin cracking, shim migration, diagonal brace cracking, and fastener looseness in the engine drag fitting area, along with required corrective actions. This directive aims to maintain structural integrity of the engine strut by preventing compromised upper link components.

What changed

This AD introduces mandatory repetitive inspections and on-condition repairs for the upper link drag fittings and associated structures on Boeing 757 airplanes. It clarifies that installation of supplemental type certificate STC ST01518SE does not affect compliance. Additionally, it allows a detailed inspection of bolts as an alternative to dye-penetrant inspection to detect cracks.

Why it matters

This directive is critical for operators and maintenance organizations to prevent structural failures related to cracking and fastener issues in the engine strut area. Compliance ensures continued airworthiness and safety by addressing potential fatigue damage that could compromise the airplane's structural integrity. It also provides clarity on inspection methods and compliance with supplemental modifications.

What to do

Summary

What changed

Why it matters

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