Flight Controls — Horizontal Stabilizer Trim Actuator (HSTA) — Incomplete Overhaul
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must verify the serial numbers of HSTAs installed on BD-100-1A10 aircraft against the Bombardier Service Bulletins 100-27-23 and 350-27-014 within specified compliance times based on component hours or flight cycles. If affected, the HSTA must be removed and replaced accordingly. Installation of affected HSTAs without the required modification plate is prohibited from the effective date of 2024-11-26.
Summary
Canadian Airworthiness Directive CF-2024-38 addresses an incomplete overhaul issue with the Horizontal Stabilizer Trim Actuator (HSTA) on Bombardier Inc. model BD-100-1A10 aircraft. The directive applies to HSTA part numbers C47100-004 and C47100-005 and requires verification and possible replacement of affected units. This directive aims to ensure continued safe flight by preventing potential failure of HSTA components.
What changed
CF-2024-38 introduces a new requirement to verify the serial numbers of HSTAs installed on Bombardier BD-100-1A10 aircraft and mandates removal and replacement of units that were incompletely overhauled. It prohibits installation of affected HSTAs without a specific modification plate. The directive also sets compliance times based on component hours and flight cycles.
Why it matters
This directive is critical for operators and maintenance organizations to prevent failure of the horizontal stabilizer trim actuator, which could lead to loss of control of the horizontal stabilizer and compromise flight safety. Compliance ensures regulatory adherence and reduces risk of in-service failures. Maintenance teams must carefully track affected serial numbers and adhere to replacement timelines.
More for Bombardier BD-100
All 41- EASA AD CF-2025-58Time Limits/Maintenance Checks (TLMC) — Airworthiness Limitations (AWL)Nov 14, 2025
- EASA AD CF-2025-42Flight Controls — Horizontal Stabilizer — Autopilot Inability to Trim Horizontal StabilizerAug 28, 2025
- EASA SIB CASA-2025-03Flight Controls — Unannunciated Loss of Ground Lift Dump Spoilers due to Faulty Throttle Quadrant AssemblyApr 9, 2025
- EASA AD CF-2024-17Time Limits/Maintenance Checks — Airworthiness LimitationsMay 24, 2024
Get the next one by email
New ADs and bulletins for Bombardier BD-100, summarized like this page, every Monday.