Airworthiness Directive · Amendment 39-19697 · Flight controls
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20001 through 20337 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a report of a mis-installed no-back pawl discovered on a horizontal stabilizer trim actuator (HSTA). This AD requires an inspection to verify the horizontal stabilizer trim electronic control unit (HSTECU) part number, a software upgrade for certain HSTECUs, and installation of HSTECUs with upgraded software. The FAA is issuing this AD to address the unsafe condition on these products.
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.
(1) If, during the inspection specified in paragraph (g) of this AD, the installed HSTECU has P/N C47329-003: Within 100 flight hours or 60 days, whichever occurs first, after the effective date of this AD, remove the HSTECU and install an upgraded HSTECU having P/N C47329-010, C47329-011 or C47329-012, in accordance with paragraphs 2.B.(2) through 2.B.(4) of the Accomplishment Instructions of Bombardier Service Bulletin 100-27-15, Revision 01, dated June 11, 2019.
(2) If, during the inspection specified in paragraph (g) of this AD, the installed HSTECU has P/N C47329-004, C47329-005 or C47329-006: Within 100 flight hours or 60 days, whichever occurs first, after the effective date of this AD, remove the HSTECU, upgrade the HSTECU software, and reinstall the upgraded HSTECU, in accordance with paragraphs 2.B.(2) through 2.B.(4) of the Accomplishment Instructions of Bombardier Service Bulletin 100-27-15, Revision 01, dated June 11, 2019.
As of the effective date of this AD, no person may install, on any airplane, an HSTECU having P/N C47329-003, C47329-004, C47329-005 or C47329-006.
Although Bombardier Service Bulletin 100-27-15, Revision 01, dated June 11, 2019, specifies to submit certain information to the manufacturer, this AD does not include that requirement.
