EASA AD US-2019-22-01
Wings - Side of Body Rib - Inspection
Summary
FAA Airworthiness Directive 2019-22-01 is a final rule addressing certain Boeing 787-8 airplanes. It mandates repetitive inspections of the side of body (SOB) rib webs at wing spar terminal fitting fastener locations to detect fatigue cracking. This directive aims to maintain structural integrity by preventing fatigue-related failures in primary wing structures.
What Changed
This new airworthiness directive introduces mandatory repetitive inspections using high frequency eddy current or ultrasonic methods for fatigue cracks in the SOB rib webs of Boeing 787-8 airplanes. It also requires applicable on-condition repairs if cracking is found. The directive corrects previous engineering requirements related to machine mismatch control at part faying surfaces.
Why It Matters
This directive is critical for aviation professionals because undetected fatigue cracks in the SOB rib webs can compromise the wing's ability to sustain limit loads, threatening aircraft structural integrity. Operators and maintenance teams must ensure compliance to prevent potential in-flight structural failures. It also clarifies repair procedures and compliance expectations, aiding maintenance planning and safety assurance.
What To Do
Operators of Boeing 787-8 airplanes must perform repetitive inspections for fatigue cracking at specified intervals as detailed in Boeing Alert Requirements Bulletin B787-81205-SB570036-00 RB, Issue 001, dated December 14, 2018. Any detected cracks must be repaired following FAA-approved methods. Compliance with this directive is required by December 17, 2019.
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