Airworthiness directives › 2026-02-06
AD 2026-02-06 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-100-1A10. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the applicable time specified in figure 1 to paragraph (g) of this AD, do an inspection to determine the serial number of HSTA part number C47100-004 or C47100-005 in accordance with Section 2.B., Part A, of the Accomplishment Instructions of Bombardier Service Bulletin 100-27-23 or 350-27-014, both dated October 28, 2024, as applicable. A review of the airplane maintenance records is also acceptable provided the serial number of the HSTA can be conclusively determined from that review. Figure 1 to Paragraph ( g )—Compliance Time for Records Verification HSTA total flight hours accumulated as of the effective date of this AD Compliance time 10,000 or more Before accumulating 14,500 total flight hours on the HSTA, or before accumulating 7,500 total flight cycles on the HSTA, or within 24 months after the effective date of this AD, whichever occurs first. 9,700 or more but less than 10,000 Before accumulating 14,500 total flight hours on the HSTA, or before accumulating 7,500 total flight cycles on the HSTA, or within 36 months after the effective date of this AD, whichever occurs first. Less than 9,700 Before accumulating 14,500 total flight hours on the HSTA, or before accumulating 7,500 total flight cycles on the HSTA, or within 48 months after the effective date of this AD, whichever occurs first.
Unsafe condition
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. The FAA is issuing this AD to address HSTA parts that were not replaced as required. The unsafe condition, if not addressed, could result in the failure of HSTA components, which can contribute to horizontal stabilizer surface disconnect at the actuator level and could lead to loss of continued safe flight and landing.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1