EASA AD US-2018-25-15: Wings - Outboard Flap Track - Inspection

What to do

Operators of Boeing Model 727 airplanes must perform the required detailed and HFEC inspections of the outboard flap tracks at the intervals specified in Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018. Any cracks or discrepancies found must be repaired before further flight using FAA-approved methods. The directive is effective January 22, 2019, and inspections must be conducted according to the compliance schedule in the bulletin.

Summary

The Federal Aviation Administration's Airworthiness Directive 2018-25-15 addresses all Boeing Model 727 series airplanes. It mandates repetitive detailed and surface high frequency eddy current inspections of the outboard flap tracks to detect cracks and discrepancies, prompted by similar cracking found on Boeing 737-300 flap tracks. The directive aims to ensure structural integrity and flight safety by preventing potential flap loss and reduced airplane controllability.

What changed

This new airworthiness directive introduces mandatory repetitive inspections of the outboard flap tracks at specified positions on Boeing 727 airplanes. It requires operators to perform detailed and HFEC inspections and to carry out on-condition repairs or replacements as necessary. The directive also prohibits installation of certain flap track parts unless inspections and corrective actions are performed concurrently.

Why it matters

This directive is critical for aviation professionals because it addresses a structural safety issue that could compromise the airplane's ability to sustain flight loads, potentially leading to loss of control. Operators and maintenance organizations must implement these inspections to maintain airworthiness and comply with FAA regulations. Compliance ensures continued safe operation and avoids costly unplanned repairs or grounding.

What to do

Summary

What changed

Why it matters

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