2025-02748Proposed RuleWallet

FAA Targets Faulty O-Rings on New Airbus Regional Jets

Published Date: 2/19/2025

Proposed Rule

Summary

The FAA wants to make sure certain Airbus Canada airplanes (models BD-500-1A10 and BD-500-1A11) stay safe by fixing an electrical bonding issue caused by a changed O-ring material. They’re proposing tests and adding bonding plates to prevent problems, following Transport Canada’s lead. Comments are open until April 7, 2025, so affected operators should act soon to avoid safety risks and potential costs.

Analyzed Economic Effects

3 provisions identified: 1 benefits, 2 costs, 0 mixed.

Mandatory bonding tests and fixes for BD-500s

If you operate Airbus Canada Model BD-500-1A10 or BD-500-1A11 airplanes, the FAA proposes mandatory electrical bonding tests at frame 51 and installation of two bonding plates where required, per Transport Canada AD CF-2024-32 (dated September 11, 2024). The FAA estimates this compliance work is 23 work-hours at $85/hour = $1,955 per airplane (36 U.S.-registered airplanes affected; total estimated cost to U.S. operators $70,380).

Possible additional per-connector repair costs

If any feed-through connector fails the required resistance test, operators may need on-condition work costing up to 20 work-hours x $85 = $1,700 labor plus up to $10,936 in parts, for a potential total of up to $12,636 per affected connector.

Reduced EMI/HIRF/lightning susceptibility

The proposed AD addresses an unsafe condition caused by a change in feed-through connector O-ring material at frame 51 that increased electrical bonding resistance and could make airplanes more susceptible to electromagnetic interference (EMI), high-intensity radiated fields (HIRF), and lightning strikes. Requiring bonding tests and plate installations aims to reduce that susceptibility for the affected BD-500-1A10 and BD-500-1A11 airplanes.

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Key Dates

Published Date
2/19/2025

Department and Agencies

Department
Independent Agency
Agency
Transportation Department
Federal Aviation Administration
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