EASA AD US-2019-11-06
Fuselage - Skin under the Drag Link Assembly - Inspection
Summary
Federal Aviation Administration Airworthiness Directive 2019-11-06 is a final rule addressing certain Boeing 737-600, -700, -700C, -800, -900, and -900ER series airplanes. It mandates repetitive inspections of the fuselage skin under the drag link assembly for cracks at specific fastener locations. The directive aims to ensure continued airworthiness by detecting and correcting skin cracks that could compromise structural integrity.
What Changed
This new airworthiness directive introduces mandatory repetitive inspections of the skin under the drag link assembly on specified Boeing 737 models. It also requires applicable on-condition corrective actions if cracks are found. Additionally, it clarifies that installation of Aviation Partners Boeing Supplemental Type Certificate ST00830SE winglets does not affect compliance with the AD.
Why It Matters
This AD is critical for aviation professionals as it addresses a structural safety concern that could lead to compromised fuselage integrity if left uninspected. Operators and maintenance organizations must incorporate these inspections into their maintenance programs to prevent potential failures. Compliance ensures regulatory adherence and maintains aircraft safety and reliability.
What To Do
Operators of affected Boeing 737 models must perform repetitive inspections of the fuselage skin under the drag link assembly for cracks starting by July 17, 2019. If cracks are detected, appropriate on-condition actions must be taken as specified. Stakeholders should also note that certain post-repair and post-modification inspections are excluded from AD-mandated actions, and installation of STC ST00830SE winglets does not require alternative compliance approvals.
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