Airworthiness Directive · Amendment 39-19323 · Landing gear
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model airplanes, certificated in any category, identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD.
(1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, serial numbers 10002 and subsequent.
(2) Model CL-600-2D15 (Regional Jet Series 705) airplanes and Model CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 15001 and subsequent.
(3) Model CL-600-2E25 (Regional Jet Series 1000) airplanes, serial numbers 19001 and subsequent.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes; Model CL-600-2D15 (Regional Jet Series 705) airplanes; Model CL-600-2D24 (Regional Jet Series 900) airplanes; and Model CL- 600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports indicating that corrosion was found on the main landing gear (MLG) retraction actuator brackets and their associated pins. This AD requires an inspection of the retraction actuator brackets, their associated pins and hardware, and the mating lugs on the MLG outer cylinder for any corrosion, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.
For any MLG dressed shock strut assembly with part numbers and serial numbers specified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-32-060, Revision B, dated November 10, 2017, at the applicable compliance times specified in paragraphs (g)(1), (g)(2), or (g)(3) of this AD, do a detailed visual inspection of the retraction actuator brackets, their associated pins and hardware, and the mating lugs on the MLG outer cylinder for any corrosion, and do all applicable replacements, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-060, Revision B, dated November 10, 2017. Do all applicable replacements before further flight.
(1) For any MLG dressed shock strut assembly that has accumulated less than 10,000 total flight hours on the MLG dressed shock strut assembly and has been in service for less than 60 months since its first installation on an airplane: Within 6,600 flight hours or 39 months, whichever occurs first, after the effective date of this AD.
(2) For any MLG dressed shock strut assembly that has accumulated less than or equal to 14,000 total flight hours on the MLG dressed shock strut assembly, and has been in service for less than 84 months since its first installation on an airplane, and does not meet the criteria in paragraph (g)(1) of this AD: Within 4,400 flight hours or 26 months, whichever occurs first, after the effective date of this AD, but not to exceed 16,600 total flight hours on the MLG dressed shock strut assembly or 99 months since its first installation on an airplane, whichever occurs first.
(3) For any MLG dressed shock strut assembly that has accumulated more than 14,000 total flight hours on the MLG dressed shock strut assembly or 84 months or more since its first installation on an airplane: Within 2,600 flight hours or 15 months, whichever occurs first, after the effective date of this AD.
For any MLG dressed shock strut assembly with part numbers and serial numbers specified in paragraph 1.A., “Effectivity,” of Bombardier Service Bulletin 670BA-32-060, Revision B, dated November 10, 2017: The actions specified in paragraph (g) of this AD are not required provided that the actions in paragraphs (h)(1), (h)(2), or (h)(3) of this AD have been done.
(1) The actions in paragraphs (h)(1)(i), (h)(1)(ii), (h)(1)(iii), and (h)(1)(iv) of this AD, as applicable, have been done on the MLG dressed shock strut assembly since its entry-into-service date.
(i) Airplane Maintenance Manual (AMM) Task 32-32-05-400-803, Installation of the Outboard MLG Retraction Actuator Bracket Pin, or equivalent task in Component Maintenance Manual (CMM) 32-11-05 (for Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes), or CMM 32-11-06 (for Model CL-600-2D15 (Regional Jet Series 705) airplanes and Model CL-600-2D24 (Regional Jet Series 900) airplanes), or CMM 32-11-34 (for Model CL-600-2E25 (Regional Jet Series 1000) airplanes); and
(ii) AMM Task 32-32-05-400-804, Installation of the Inboard MLG Retraction-Actuator Bracket Pin, or equivalent task in CMM 32-11-05 (for Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes), or CMM 32-11-06 (for Model CL-600-2D15 (Regional Jet Series 705) airplanes and Model CL-600-2D24 (Regional Jet Series 900) airplanes), or CMM 32-11-34 (for Model CL-600-2E25 (Regional Jet Series 1000) airplanes); and
(iii) AMM Task 32-32-05-400-805, Installation of the Inboard-MLG Retraction-Actuator Pin, or AMM Task 32-32-05-400-801, Installation of the MLG Retraction-Actuator, or AMM Task 32-11-05-400-801, Installation of the MLG Shock-Strut Assembly; and
(iv) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, and Model CL-600-2D24 (Regional Jet Series 900) airplanes equipped with MLG auxiliary actuators: AMM Task 32-32-03-400-801, Installation of the MLG Auxiliary Actuator, or AMM Task 32-11-05-400-801, Installation of the MLG Shock-Strut Assembly.
(2) AMM Task 32-32-05-400-806, Installation of the MLG Retraction-Actuator Bracket has been accomplished on the MLG dressed shock strut assembly since its entry-into-service date.
(3) AMM Task 32-11-00-610-801, Restoration (Overhaul) of the MLG Assembly has been accomplished on the MLG dressed shock strut assembly since its entry-into-service date.
