Airworthiness directives › 2019-15-04
AD 2019-15-04 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 Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20001 through 20337 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 100 flight hours or 60 days, whichever occurs first, after the effective date of this AD: Perform an inspection to verify the part number (P/N) of the horizontal stabilizer trim electronic control unit (HSTECU) installed on the airplane, in accordance with paragraph 2.B.(1) of the Accomplishment Instructions of Bombardier Service Bulletin 100-27-15, Revision 01, dated June 11, 2019. If the installed HSTECU has P/N C47329-007 or subsequent configurations, no further action is required by this paragraph.
Unsafe condition
This AD was prompted by a report of a mis-installed no-back pawl discovered on a horizontal stabilizer trim actuator (HSTA). The FAA is issuing this AD to address the possible unavailability of the no-back pawl which, in combination with loss of or degraded HSTA motor brake assembly (MBA) braking capability, could lead to a loss of the airplane.
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