Instruments – Angle of Attack Probe Electrical Routing – Inspection /; Modification; Aircraft Flight Manual - Amendment
Superseded. Comply with 2023-0134, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2020-0221
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform a visual inspection of the affected wiring within two months after 27 October 2020 and report the results to ATR within 30 days of inspection. For Group 1 aeroplanes, the wiring modification must be completed within 12 months of the directive's effective date, along with an AFM amendment. Group 2 aeroplanes must amend their AFM within 12 months. Flight crews must be informed of the AFM changes and operate accordingly.
Summary
EASA Airworthiness Directive 2021-0024 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting ATR 42-200, ATR 42-300, and ATR 42-320 aeroplanes. It addresses issues related to the electrical wiring routing of the Angle of Attack (AOA) probes that can cause spurious activation of the stall warning system. The directive mandates inspections, wiring modifications, and amendments to the Aircraft Flight Manual to mitigate the risk of loss of control during critical flight phases.
What changed
This directive supersedes EASA AD 2020-0221 and introduces a mandatory wiring modification for Group 1 ATR 42 aeroplanes and requires an amendment to the Aircraft Flight Manual for all affected aeroplanes. It retains the previous inspection requirements and adds corrective actions and reporting obligations. The directive also incorporates updated procedures to prevent false stall warnings caused by wiring damage.
Why it matters
This directive is critical for aviation professionals because it addresses a safety issue that can lead to unintended stall warnings, autopilot disconnection, and potential loss of control during take-off and landing. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and flight safety. The AFM amendment also requires flight crews to adjust procedures to prevent inadvertent stick pusher or shaker activation.
More for ATR ATR42
All 70- EASA PAD 26-119Oxygen – Oxygen Pressure Regulator – InspectionOct 2, 2026
- EASA AD 2026-0185Flight Controls – Angle of Attack Probes – Functional ChecksSep 29, 2026
- EASA PAD 26-097Flight Controls – Angle of Attack Probes – Functional ChecksAug 27, 2026
- EASA AD 2026-0046Landing Gear — Landing Gear Selector Valve — Functional CheckMar 6, 2026
- EASA AD 2026-0038Air Conditioning — Integrated Air System Control — ModificationFeb 26, 2026
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