Airworthiness directives › 2025-22-04
AD 2025-22-04 Airworthiness Directives; Bombardier, Inc., Airplanes
Applicability*9
This AD applies to all Bombardier, Inc., Model CL-600-2B16 (604 Variant) airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes that have incorporated Bombardier Service Bulletin 604-27-035, Bombardier Service Bulletin 605-27-006, or Bombardier Service Bulletin 650-27-001 as of the effective date of this AD: Within 1,000 flight hours or 14 months, whichever occurs first, after the effective date of this AD, disconnect the FSOBR in accordance with Section 2.B of the Accomplishment Instructions of the applicable service bulletin listed in table 1 to paragraph (g) of this AD. ER18NO25.033
Unsafe condition
This AD was prompted by reports that the flap system on-board recorder (FSOBR) interfaces with the flap control unit signals and may result in the flap control unit monitors tripping, causing Flap Fail messages and possibly an uncommanded flap movement. The FAA is issuing this AD to address uncommanded flap runaway. The unsafe condition, if not addressed, could lead to loss of control of the airplane.
Affected ADs
None.
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