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.
Personalized for You
How does this regulation affect your finances?
Personalize government policy and PRIA will tell you what this federal register document means for your household, plus every other regulation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-15585, Requirements for Interference-Tolerant Radio Altimeter Systems
In July 2025, President Trump signed the One Big Beautiful Bill Act. Section 40002 of that law re-institutes the Federal Communications Commission's general auction authority and specifically directs the Commission to complete a system of competitive bidding for not less than 100 megahertz in the 3.98-4.2 gigahertz band (Upper C- band). This final rule supports the Federal Communications Commission's July 2026 Report and Order that makes 160 megahertz of the Upper C-band available for terrestrial wireless flexible use via a system of competitive bidding. To ensure safe, efficient, and reliable aviation operations in the presence of wireless signals in the C-band, the Federal Aviation Administration is issuing new regulations that require all radio altimeters to meet specific minimum performance requirements. These new radio altimeters must withstand interference from wireless signals in neighboring spectrum bands and continue to provide accurate altitude readings to both pilots and integrated aircraft safety systems. These regulations require all aircraft equipped with radio altimeters operating under part 121 and those aircraft with radio altimeters operating under part 129 with 30 or more passenger seats or a payload capacity of more than 7,500 pounds to comply with the minimum performance requirements by December 30, 2030, which is prior to the date the Federal Communications Commission authorizes the use of the Upper C-band for new wireless services, as stated in its Report and Order. All other aircraft equipped with radio altimeters that are required to comply with part 91, including aircraft operating under parts 125, 133, 135, 136, 137, 194, and all other aircraft operating under part 129 that are not subject to the initial deadline, must comply with the same minimum performance requirements on or before October 31, 2034.
2026-13440, Enabling Supersonic Overland Flight
The FAA wants to let supersonic planes fly over land again by updating old rules that banned them because of loud sonic booms. Thanks to new tech that keeps booms quiet, this change will open the door for faster, cooler flights across the U.S., helping America lead the world in supersonic travel. People and companies interested in supersonic flight should share their thoughts by August 17, 2026.
2026-13126, Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility; Extension of Comment Period
The FAA is giving more time—until August 5, 2026—for people to share their thoughts on new rules that would limit drone flights near important fixed sites like power plants or airports. This affects drone operators and facility owners who want to keep the skies safe and secure. No new costs yet, just extra time to weigh in and help shape the rules.
2026-08943, Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility
The FAA is proposing new rules to keep drones away from certain important fixed sites like power plants or airports to keep everyone safe and secure. If you own or operate one of these sites, you can request a drone flight restriction zone to protect your property and people nearby. Comments are open until July 6, 2026, and these changes could affect drone pilots and site operators, but no big costs are expected.
2025-04846, Extension of the Prohibition Against Certain Flights in the Territory and Airspace of Libya
The FAA is extending the ban on certain flights over Libya for three more years, until March 20, 2028. This affects U.S. airlines, commercial operators, and pilots with FAA certificates flying in Libyan airspace, due to ongoing safety risks. The rule also reminds everyone how to apply for special approvals or exemptions if needed.
2025-03853, Enforcement Policy Regarding “Drug and Alcohol Testing of Certificated Repair Station Employees Located Outside of the United States; Correction”
The FAA is giving repair stations outside the U.S. a break by delaying enforcement of new drug and alcohol testing rules until March 20, 2025. This means affected repair stations don’t have to worry about penalties if they aren’t fully following the updated rules just yet. The delay helps everyone get ready without rushing or extra costs.
Previous / Next Documents
Previous: 2025-02746, Airworthiness Directives; Airbus SAS Airplanes
The FAA wants Airbus A350-941 and -1041 planes to follow new, stricter safety checks to keep flying safe. This means updating their maintenance plans soon, based on rules from Europe’s aviation agency. Airlines and maintenance crews should get ready to act by April 7, 2025, to avoid any safety or cost surprises.
Next: 2025-02774, Amendment of Jet Route J-146 and Establishment of United States RNAV Route Q-186 in the Vicinity of Chardon, OH
The FAA is updating flight paths near Chardon, Ohio, by changing Jet Route J-146 and creating a new RNAV Route Q-186 because the Chardon VOR navigation system is being shut down. This affects pilots and airlines flying in that area, helping them navigate safely with newer tech. Comments on this change are open until April 7, 2025, and there’s no expected cost impact for travelers or airlines.