Airworthiness Directive · Amendment 39-16424 · Flight controls
Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702); Model CL-600-2D15 (Regional Jet Series 705); and Model CL-600-2D24 (Regional Jet Series 900) Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702); Model CL-600-2D15 (Regional Jet Series 705); and Model CL-600-2D24 (Regional Jet Series 900) airplanes; certificated in any category; having horizontal stabilizer trim actuators (HSTAs) with part number (P/N) 8489-7 or 8489-7R.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 500 flight cycles after the effective date of this AD: Inspect HSTAs having P/Ns 8489-7 and 8489-7R to determine if the serial numbers (S/Ns) identified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010, are installed. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial number of the HSTA can be conclusively determined from that review.
(1) For any HSTA with a serial number that is not identified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010: No further action is required by paragraph (g) of this AD.
(2) For any HSTA with a serial number that is identified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010: Replace the HSTA with a serviceable HSTA, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010, at the applicable time specified by paragraph (g)(2)(i), (g)(2)(ii), (g)(2)(iii), or (g)(2)(iv) of this AD.
Note 1: Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010, references Sagem SA Service Bulletin 8489-27-006, dated December 8, 2009, as an additional source of guidance for modifying the HSTA. Sagem SA Service Bulletin 8489-27-006, dated December 8, 2009, references Ratier-Figeac Service Bulletin RF-DSC-075-07, Version 03, dated November 10, 2009, as an additional source of guidance for modifying the HSTA. The suffix “A” after the serial number indicates serviceable HSTAs that have been modified.
(i) For any HSTA that has accumulated less than or equal to 8,000 flight cycles as of the effective date of this AD: Before the HSTA accumulates 10,000 flight cycles.
(ii) For any HSTA that has accumulated more than 8,000 flight cycles but less than or equal to 10,000 flight cycles as of the effective date of this AD: Before the HSTA accumulates an additional 2,000 flight cycles, but no later than 11,000 flight cycles on the HSTA.
(iii) For any HSTA that has accumulated more than 10,000 flight cycles but less than or equal to 12,000 flight cycles as of the effective date of this AD: Before the HSTA accumulates an additional 1,000 flight cycles, but no later than 12,500 flight cycles on the HSTA.
(iv) For any HSTAs that has accumulated more than 12,000 flight cycles as of the effective date of this AD: Before the HSTA accumulates an additional 500 flight cycles.
(h) As of the effective date of this AD, no person may install an HSTA, having P/N 8489-7 or 8489-7R, with a serial number identified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-27-057, dated June 14, 2010, on any airplane.
Note 2: This AD differs from the MCAI and/or service information as follows: Canadian Airworthiness Directive CF-2010-20, dated July 19, 2010, refers to an incorrect date of April 28, 2010, for Bombardier Service Bulletin 670BA-27-057. The correct date for Bombardier Service Bulletin 670BA-27-057 is June 14, 2010.
