# 2026-01032: Bombardier Jets Get Trim Check: FAA Flags Faulty Stabilizer Parts

2026-01032, Airworthiness Directives; Bombardier, Inc., Airplanes, is a Federal Register rule from Transportation Department, Federal Aviation Administration published 2026-01-21, effective 2026-02-25 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2026-01032
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-01032
- Title: Airworthiness Directives; Bombardier, Inc., Airplanes
- Type: Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 2459
- Published: 2026-01-21
- Effective: 2026-02-25
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-06-11

## In one line

Bombardier Jets Get Trim Check: FAA Flags Faulty Stabilizer Parts

## 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.

## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a report that some parts of horizontal stabilizer trim actuators (HSTAs) that were meant to be replaced through a required overhaul were not replaced and were instead reinstalled on the HSTAs. This AD requires verification of the HSTA serial number, and, if applicable, replacement of the HSTA. This AD also prohibits the installation of affected parts under certain conditions. The FAA is issuing this AD to address the unsafe condition on these products.

## Effects PRIA read

- Mandatory HSTA Serial-Number Checks: cost, medium. 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…
- Required Replacement of Affected HSTAs: cost, high. 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 wit…
- Prohibition on Installing Affected HSTAs: cost, low. 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…
- FAA Cost Estimates and Warranty Note: cost, high. 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…

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## Sources
- [2026-01032 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/21/2026-01032/airworthiness-directives-bombardier-inc-airplanes)
- [2026-01032 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-21/pdf/2026-01032.pdf)

## Related
- [Previous: 2026-01004, Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes](https://policyrisk.com/federal-register/2026-01004)
- [Next: 2026-01033, Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held…](https://policyrisk.com/federal-register/2026-01033)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-01032 (as of 2026-06-11).