New Maintenance Rules Target ATR42-500 Fleet Safety
Published Date: 5/27/2026
Rule
Summary
The FAA is updating safety rules for certain ATR42-500 airplanes to keep them flying safely. Starting July 1, 2026, operators must follow new, stricter maintenance checks to fix potential safety issues. This means airlines will need to update their inspection programs, but it helps keep passengers and crews safe without big costs.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
Operators Must Revise Maintenance Programs
If you operate ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 airplanes (original airworthiness certificate or export certificate issued on or before November 22, 2024), you must revise your existing maintenance or inspection program to incorporate new or more restrictive airworthiness limitations. The AD is effective July 1, 2026 and requires the revision within 90 days after that date. The FAA estimates this affects 9 U.S.-registered airplanes and the average total cost per operator to be $7,650 (90 work-hours × $85 per hour).
Reduces Fuel Tank Explosion Risk
This AD requires new or more restrictive airworthiness limitations to address potential ignition sources inside fuel tanks on certain ATR42-500 airplanes, reducing the risk of a fuel tank explosion and consequent loss of the airplane. The rule is effective July 1, 2026 and applies to ATR42-500 airplanes with original airworthiness certificates or export certificates issued on or before November 22, 2024.
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