Instruments – Angle of Attack Probe Electrical Routing – Inspection /; Modification; Aircraft Flight Manual – Amendment
Superseded. Comply with 2023-0191, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2021-0024
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected ATR 42 aeroplanes must perform a visual inspection of the AOA probe wiring if not already done, carry out required wiring modifications within specified deadlines, and amend the Aircraft Flight Manual accordingly. The final modification involving installation of the AOA power supply unit must be completed within 14 months of the AD's effective date, after which the AFM amendment can be removed. Compliance with all corrective actions and reporting requirements is mandatory.
Summary
EASA Airworthiness Directive 2023-0134 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 electrical wiring issues related to the Angle of Attack (AOA) probes that could cause spurious stall warning activations. The directive mandates inspections, wiring modifications, and amendments to the Aircraft Flight Manual to ensure continued safe operation.
What changed
This directive supersedes EASA AD 2021-0024 and introduces the installation of a new AOA power supply unit as a final modification. It also allows for the removal of previously required AFM amendments once the new modification is installed. The AD retains prior inspection and modification requirements while updating compliance methods and timelines.
Why it matters
This AD is critical for aviation professionals because it addresses a safety risk that could lead to loss of control during take-off and landing due to false stall warnings. Operators and maintenance organizations must comply to prevent inadvertent autopilot disconnections and stick pusher activations, ensuring aircraft safety and regulatory compliance. The directive also streamlines compliance by allowing removal of temporary AFM amendments after the final modification.
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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