FAA Admits Helicopter Safety Oops, Issues Do-Over Rule
Published Date: 11/25/2025
Proposed Rule
Summary
The FAA is updating safety rules for certain Airbus Helicopters to fix mistakes in inspection schedules for the main gearbox parts. If you own or operate these helicopters, you’ll need to keep checking these parts regularly to stay safe. Comments on the new rules are open until January 9, 2026, and following them helps avoid costly repairs or accidents.
Analyzed Economic Effects
4 provisions identified: 2 benefits, 2 costs, 0 mixed.
Potentially large repair bills if particles found
If inspections find particles in the main gearbox, you may need on-condition work that can be costly: metallurgical analysis is estimated at $510, close monitoring $170 per cycle, a borescope inspection $85, replacing an epicyclic module about $55,284, and replacing a bevel reduction module about $23,260. The FAA says it cannot predict how many helicopters will need these corrective actions.
Less-frequent inspections for many models
If you own or operate certain Airbus helicopter models (AS350B, AS350B1, AS350BA, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP), the FAA proposes changing the recurring inspection interval from 30 hours time-in-service (TIS) to 100 hours TIS, with initial inspections required 5 or 10 hours after May 9, 2025 depending on model. The FAA estimates an inspection takes 1 work-hour at $85 each and that the proposed AD would affect 522 U.S.-registered helicopters (total estimated recurring inspection cost per helicopter: $85).
More frequent checks for EC130B4
If you own or operate an EC130B4 helicopter, the FAA proposes changing the recurring inspection interval from 150 hours TIS to 100 hours TIS, with an initial inspection 5 hours after May 9, 2025. Each inspection is estimated at 1 work-hour ($85).
Operational flexibilities and limits
The proposed AD lets the owner/operator pilot (with at least a private pilot certificate) turn the tail rotor for the specified inspection action and requires that action be recorded in maintenance logs. The rule also allows a one-time, non‑revenue special flight permit with only essential flight crew to reach a location where required work can be done.
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Key Dates
Department and Agencies
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