Airworthiness DirectiveEASA AD 2018-0137R1

Nacelles / Pylons — Pylon Aft Fixed Fairings — Inspection

Published: Jan 9, 2019
Effective: Jan 16, 2019
Deadline: Jan 16, 2019
Replaces: 2018-0137
Replaces: 2014-0154

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What to do

Operators must perform repetitive inspections of the pylon AFF within specified flight cycle or flight hour limits using Airbus Service Bulletin A320-54-1027 Rev. 04 instructions. If cracks are detected, corrective actions must be completed before the next flight. For terminating action, operators should apply Airbus modifications 159806 or 156765 via the relevant service bulletins to eliminate the need for further repetitive inspections. Installation of affected AFF parts is prohibited after specified dates, and compliance with these requirements must be ensured promptly.

Summary

EASA Airworthiness Directive 2018-0137R1 is an updated regulatory requirement addressing inspection of pylon aft fixed fairings (AFF) on Airbus A318, A319, A320, and A321 aircraft equipped with CFM pylons post-modification 33844. The directive mandates repetitive inspections to detect fatigue-induced cracks in the pylon AFF structure, particularly focusing on the upper spar at rib 15, and outlines corrective actions and optional terminating modifications. It applies to all serial numbers with the specified modification embodied in production.

What changed

EASA Airworthiness Directive 2018-0137R1 revises the original AD 2018-0137 by merging previous inspection requirements with new inspection areas prompted by recent crack findings on rib 15 of the pylon AFF. It clarifies compliance instructions, incorporates updated Airbus service bulletins, and provides detailed part number references for affected and terminating action components. The revision also addresses operator comments and requests for clarification.

Why it matters

This directive is critical for operators and maintenance organizations to prevent potential detachment of the pylon aft fixed fairing, which could cause safety hazards including injury to persons on the ground. Compliance ensures continued airworthiness and structural integrity of the affected Airbus aircraft, avoiding unplanned maintenance and operational disruptions. It also provides clear guidance on inspection intervals and acceptable corrective and terminating actions, facilitating regulatory compliance and fleet safety management.

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