Fire Protection — Fire Detection — Fire Detection and Extinguishing (FIREX) Control Unit Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bombardier BD-100-1A10 aircraft with serial numbers 20003 through 20669 must remove and replace the FIREX control unit P/N 474112-2 within 24 months from May 1, 2020, following the specified Bombardier service bulletins. Additionally, installation of the affected control unit is prohibited from the effective date. Maintenance personnel should refer to the applicable service bulletins for detailed replacement instructions.
Summary
The Canadian Airworthiness Directive CF-2020-12 mandates the replacement of the Fire Detection and Extinguishing (FIREX) control unit part number 474112-2 on Bombardier BD-100-1A10 aircraft, serial numbers 20003 through 20669. This directive addresses fire protection system reliability by targeting a specific control unit susceptible to internal electrical noise. The directive applies to aircraft equipped with the affected FIREX control unit.
What changed
CF-2020-12 introduces a new requirement to remove and replace the FIREX control unit P/N 474112-2 within 24 months of the directive's effective date. It also prohibits the installation of this specific control unit on the affected Bombardier BD-100-1A10 aircraft from the effective date onward. This is a new regulation responding to identified failures of the control unit.
Why it matters
This directive is critical for aviation professionals because failure of the FIREX control unit can lead to loss of fire detection capability, posing a significant safety risk. Operators and maintenance organizations must ensure compliance to maintain airworthiness and safety standards. Compliance teams need to track and verify replacement actions to meet regulatory requirements and avoid grounding of aircraft.
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-2024-38Flight Controls — Horizontal Stabilizer Trim Actuator (HSTA) — Incomplete OverhaulNov 15, 2024
Get the next one by email
New ADs and bulletins for Bombardier BD-100, summarized like this page, every Monday.