Airworthiness Directive · Amendment 39-19088 · Flight controls
Bombardier, Inc., Airplanes
This AD applies to the Bombardier, Inc., airplanes identified in paragraphs (c)(1) through (c)(4) of this AD, certificated in any category, equipped with horizontal stabilizer trim actuator (HSTA) part number 8489-7 or 8489-7R.
(1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes.
(2) Model CL-600-2D15 (Regional Jet Series 705) airplanes.
(3) Model CL-600-2D24 (Regional Jet Series 900) airplanes.
(4) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional Jet Series 705), Model CL-600-2D24 (Regional Jet Series 900), and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by a report indicating that a number of rubber bull gear (RBG) wheels installed in the horizontal stabilizer trim actuator (HSTA) were manufactured using an incorrect material specification. This AD requires replacement of the affected RBG wheels. We are issuing this AD to address the unsafe condition on these products.
Within 600 flight hours after the effective date of this AD, inspect to determine whether the serial number (S/N) of the installed HSTA is listed in paragraph 1.A, “Effectivity,” of Bombardier Service Bulletin 670BA-27-072, Revision A, dated October 26, 2016. If the S/N of the installed HSTA is not listed in paragraph 1.A, “Effectivity,” of Bombardier Service Bulletin 670BA-27-072, Revision A, dated October 26, 2016, no further action is required by this AD, except as required by paragraph (j) of this AD. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the HSTA can be conclusively determined from that review.
For any HSTA with a S/N listed in paragraph 1.A, “Effectivity,” of Bombardier Service Bulletin 670BA-27-072, Revision A, dated October 26, 2016: Within the compliance times specified in figure 1 to paragraph (h) of this AD, as applicable, replace the affected HSTA, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-072, Revision A, dated October 26, 2016.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
