Airworthiness Directive · Amendment 39-18742 · Landing gear
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2E25 (Regional Jet Series 1000) airplanes, certificated in any category, serial numbers 19002 through 19041 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports of two cases where the main landing gear (MLG) failed to fully extend; it was determined that interference between the MLG door and the MLG fairing seal prevented the MLG door from opening fully. This AD requires repetitive inspections of the MLG fairing, fairing seal, door, and adjacent structures; and replacement or repair of affected parts and fasteners, or removal of the MLG door, if necessary. This AD also requires installation of a safety guide in the MLG fairing and an increase of the spacing between the MLG door and the fairing, which would terminate the repetitive inspections. We are issuing this AD to address the unsafe condition on these products.
Within 660 flight hours after the effective date of this AD, conduct a detailed inspection for damage to the MLG fairing, fairing seal, door, and adjacent structures, and for missing parts and fasteners, in accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013. Repeat the inspection thereafter at intervals not to exceed 660 flight hours until the installation required by paragraph (m) of this AD is done.
If damage to the MLG fairing seal is found during any inspection required by paragraph (g) of this AD, before further flight, replace the seal, in accordance with Part B of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013; or remove the MLG door, in accordance with Part C of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013.
If damage to the MLG door is found during any inspection required by paragraph (g) of this AD, before further flight, repair using a method approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO); or remove the MLG door, in accordance with Part C of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013.
If damage to the MLG fairing is found during any inspection required by paragraph (g) of this AD, before further flight, repair using a method approved by the Manager, New York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO.
If damage to the adjacent structure is found or if any part or fastener is found missing or damaged during any inspection required by paragraph (g) of this AD, before further flight, do the applicable actions specified in paragraphs (k)(1) and (k)(2) of this AD.
(1) Replace missing or damaged parts and fasteners, in accordance with Part A of the Accomplishment Instruction of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013, except where Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013, specifies to contact Bombardier, before further flight, repair using a method approved by the Manager, New York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO.
(2) Repair damaged structure using a method approved by the Manager, New York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO.
For any MLG door that has been removed as specified in paragraph (h) or (i) of this AD: Reinstallation of the door, if accomplished, must be done in accordance with Part D of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013. Before further flight after any reinstallation, the inspection required by paragraph (g) of this AD must be done and the inspection must be repeated thereafter at the times specified in paragraph (g) of this AD until the installation required by paragraph (m) of this AD is done.
Except as required by paragraph (n) of this AD: Within 6,600 flight hours or 36 months, whichever occurs first, after the effective date of this AD, install a safety guide on the MLG fairing and increase the spacing between the MLG door and the fairing, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-049, dated May 26, 2015. Accomplishment of these actions terminates the requirements of paragraphs (g) and (l) of this AD.
If the MLG door has been removed in accordance with Part C of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-041, dated March 28, 2013, the installation required by paragraph (m) of this AD may be delayed until the MLG door is reinstalled in accordance with paragraph (l) of this AD. When the removed MLG door is reinstalled, the installation required by paragraph (m) of this AD must be done at the time specified in paragraph (m) of this AD or before further flight after reinstallation of the removed MLG door, whichever occurs later.
