EASA AD 2025-0087: Flight Controls — Flap Asymmetry Detection Mechanism — Inspection

What to do

Operators of ATR 42-200, ATR 42-300, and ATR 42-320 aircraft must perform a one-time Special Detailed Inspection of the flap asymmetry detection mechanism within six months of 30 April 2025. If any issues are found, corrective actions must be taken before the next flight following ATR's approved repair instructions. Stakeholders should refer to ATR Service Bulletin ATR42-27-0116 for inspection procedures and maintain communication with ATR and EASA for any alternative compliance methods.

Summary

EASA Airworthiness Directive 2025-0087 is an airworthiness directive issued by EASA that applies to ATR 42-200, ATR 42-300, and ATR 42-320 aeroplanes of all manufacturer serial numbers. It mandates inspection of the flap asymmetry detection mechanism to ensure continued safe operation of these aircraft. The directive addresses a potential safety issue related to worn splines in the flap asymmetry detector and flap interconnection shaft.

What changed

This new airworthiness directive introduces a one-time Special Detailed Inspection (SDI) of the flap asymmetry detection mechanism on affected ATR 42 models. It requires corrective actions if any discrepancies are found during the inspection, including contacting ATR for approved repair instructions. No previous ADs are superseded by this directive.

Why it matters

This directive is critical for aviation professionals as it addresses a safety risk that could lead to loss of flap asymmetry monitoring, potentially reducing aircraft control during flap operations. Operators and maintenance organizations must ensure compliance to prevent unsafe conditions and maintain regulatory airworthiness standards. Compliance helps avoid operational disruptions and ensures continued airworthiness of the affected ATR 42 fleet.

What to do

Summary

What changed

Why it matters

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