Bombardier Jets Get Trim Check: FAA Flags Faulty Stabilizer Parts
Published Date: 1/21/2026
Rule
Summary
The FAA is making a new rule for all Bombardier BD-100-1A10 airplanes because some important parts in the horizontal stabilizer trim actuators weren’t properly replaced during maintenance. Owners must check the serial numbers and replace any faulty parts to keep flying safe. This rule starts February 25, 2026, and could mean some extra costs for inspections and replacements.
Analyzed Economic Effects
4 provisions identified: 0 benefits, 4 costs, 0 mixed.
Required Replacement of Affected HSTAs
If the HSTA serial number is listed in Section 1.A. of Bombardier Service Bulletin 100-27-23 or 350-27-014 (both dated October 28, 2024), you must replace that HSTA at the applicable time in the compliance schedule. Affected HSTAs do not need replacement if they have a modification plate marked with Moog Service Bulletin C47100-27-07.
FAA Cost Estimates and Warranty Note
The FAA estimates this AD affects 982 U.S.-registered BD-100-1A10 airplanes. Estimated cost to do the required inspection is up to $170 per airplane (up to $166,940 on U.S. operators). The FAA estimates on-condition replacement could cost $55,365 per product, though Bombardier may cover some or all costs under warranty.
Mandatory HSTA Serial-Number Checks
If you operate a Bombardier Model BD-100-1A10, you must verify the serial number of horizontal stabilizer trim actuators (HSTA) part numbers C47100-004 or C47100-005 using the Bombardier service bulletins dated October 28, 2024. The inspection/records check must be done according to the flight-hour/cycle schedule: before accumulating 14,500 total flight hours on the HSTA or 7,500 total flight cycles, or within 24 months (if HSTA has 10,000+ hours), 36 months (if 9,700–9,999 hours), or 48 months (if <9,700 hours) after the AD effective date of February 25, 2026.
Prohibition on Installing Affected HSTAs
As of the AD effective date (February 25, 2026), no person may install an HSTA (part number C47100-004 or C47100-005) with a serial number listed in Section 1.A. of the Bombardier service bulletins unless that HSTA has a modification plate marked with Moog Service Bulletin C47100-27-07. This limits use of listed units unless they show the approved Moog marking.
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
2026-13440, 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.
2026-14881, Airworthiness Directives; Bell Textron Canada Limited Helicopters
This update affects owners and operators of Bell Textron Canada helicopters. It requires important safety checks and fixes to keep these helicopters flying safely. The changes must be done within set deadlines and might cost some money, but they help prevent serious problems in the air.
2026-14882, Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
If you own certain Rolls-Royce Trent 1000 engines, the FAA wants you to keep checking a part called the high-pressure turbine triple seal for wear and replace it if needed. They’re updating the rules to remove some engines from this check because a new fix now makes inspections unnecessary for those. Comments on this change are open until September 8, 2026, so get ready to act and keep your engines safe without breaking the bank!
2026-14886, Airworthiness Directives; Airbus Helicopters
If you own or operate an Airbus EC130B4 helicopter, heads up! The FAA wants to fix weak door locks by requiring changes to the swinging and sliding door supports. You’ll need to update your helicopter soon to keep flying safely, and no new affected doors can be installed unless they meet the new rules. Comments on this plan are open until September 8, 2026, so don’t miss your chance to weigh in!
Previous / Next Documents
Previous: 2026-01004, Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
If you own or operate a Gulfstream GVI airplane, listen up! The FAA is rolling out new, stricter safety rules that require updating your maintenance plans to keep your plane in top shape. These changes kick in on February 24, 2026, and while they might mean extra checks, they’re all about keeping flights safe and sound.
Next: 2026-01033, Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
The FAA is requiring all MHI RJ Aviation ULC regional jets (formerly Bombardier models) to replace their elevator autopilot control cables because some have failed. This fix starts February 5, 2026, to keep flights safe and smooth. Operators should act quickly to avoid delays or extra costs from potential cable problems.