Airworthiness Directive · Amendment 39-18012 · Landing gear
Bombardier, Inc. Airplanes
This AD applies to the airplanes specified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category.
(1) Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, serial numbers 10002 and subsequent.
(2) Bombardier, Inc. Model CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers15001 and subsequent.
We are superseding Airworthiness Directive (AD) 2013-16-08 for certain Bombardier, Inc. 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. AD 2013-16-08 required inspection of the main landing gear (MLG) retraction actuator components; corrective actions if necessary; and, for certain retraction actuators, installation of a new jam nut. This new AD continues to require those actions. This AD was prompted by a determination that a certain part was incorrectly identified in a certain section of AD 2013-16-08. We are issuing this AD to prevent disconnection of the MLG retraction actuator, which could result in extension of the MLG without damping, and consequent structural damage and collapse of the MLG during landing.
This paragraph restates the requirements of paragraph (g) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with no changes. For any airplane with an MLG retraction actuator assembly having any part number and serial number identified in paragraph 1.A., Effectivity, of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012, except airplanes on which modification status “32-64” is marked on the identification plate: At the applicable time specified in paragraph (g)(1) or (g)(2) of this AD, perform a detailed inspection of the retraction actuator assembly for evidence of corrosion and security of the jam nut, as applicable, in accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012; and Goodrich Service Bulletin 49600-32-63 R1, dated May 17, 2011. If any corrosion or unsecured jam nut is found, before further flight, replace the retract actuator with a new or serviceable retract actuator; and install the retract actuator, in accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012. Repeat the inspection thereafter at intervals not to exceed 1,200 flight hours or 12 months, whichever occurs first.
(1) For MLG retraction actuator assemblies on which, as of September 24, 2013 (the effective date of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013)), 8,000 or more total flight hours have accumulated since new or since overhaul, or that have been in service for more than 4 years since new or since overhaul: Inspect within 1,200 flight hours or 12 months after September 24, 2013, whichever occurs first.
(2) For MLG retraction actuator assemblies on which, as of September 24, 2013 (the effective date of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013)), less than 8,000 total flight hours have accumulated since new or since overhaul, and that have been in service for 4 years or less since new or since overhaul: Inspect before the accumulation of 9,200 total flight hours on the MLG retraction actuator assembly since new or since overhaul or within 5 years in service since new or since overhaul, whichever occurs first.
This paragraph restates the requirements of paragraph (h) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with no changes. For any airplane with an MLG dressed shock strut having any part number and serial number identified in paragraph 1.A., Effectivity, of Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 26, 2012: Within 4,400 flight hours or 24 months after September 24, 2013 (the effective date of AD 2013-16-08), whichever occurs first, perform a detailed inspection of the retract actuator bracket assembly, associated pins, and the mating lugs on the outer cylinder for evidence of corrosion, in accordance with Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 26, 2012; and Goodrich Service Bulletin 49000-32-46 R2, dated November 11, 2011. Do all applicable corrective actions before further flight (i.e., replace retract actuator bracket assembly and pins, or outer cylinder lugs, as applicable).
This paragraph restates the requirements of paragraph (i) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with no changes. For any airplane with an MLG retraction actuator assembly having any part number and serial number identified in paragraph 1.A., Effectivity, of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012, except airplanes on which modification status “32-64” is marked on the identification plate: Within 20,000 flight hours or 10 years after September 24, 2013 (the effective date of AD 2013-16-08), whichever occurs first, install a new jam nut having part number 49606-5, in accordance with Part B of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012; and Goodrich Service Bulletin 49600-32-64 R3, dated December 15, 2011.
(1) This paragraph restates the credit provided by paragraph (j)(1) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with a change to the service information citation in paragraph (j)(1)(iii) of this AD. This paragraph provides credit for the actions required by paragraphs (g) and (i) of this AD, if those actions were performed before September 24, 2013 (the effective date of AD 2013-16-08), using the service information specified in paragraph (j)(1)(i), (j)(1)(ii), or (j)(1)(iii) of this AD, which is not incorporated by reference in this AD.
(i) Bombardier Service Bulletin 670BA-32-031, dated March 14, 2011.
(ii) Bombardier Service Bulletin 670BA-32-031, Revision A, dated June 9, 2011.
(iii) Bombardier Service Bulletin 670BA-32-031, Revision B, dated July 29, 2011.
(2) This paragraph restates the credit provided by paragraph (j)(2) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with no changes. This paragraph provides credit for the actions required by paragraph (h) of this AD, if those actions were performed before September 24, 2013 (the effective date of AD 2013-16-08), using the service information specified in paragraph (j)(2)(i) or (j)(2)(ii) of this AD, which is not incorporated by reference in this AD.
(i) Bombardier Service Bulletin 670BA-32-033, dated March 14, 2011.
(ii) Bombardier Service Bulletin 670BA-32-033, Revision A, dated July 29, 2011.
(1) This paragraph restates the parts installation limitation specified in paragraph (k)(1) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with no changes. As of September 24, 2013 (the effective date of AD 2013-16-08), no person may install on any airplane an MLG retraction actuator assembly having any part number and serial number identified in paragraph 1.A., Effectivity, of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 17, 2012, unless that retraction actuator assembly has been inspected as specified in paragraph (g) of this AD, and all applicable corrective actions (i.e., replacement of the retract actuator) specified in paragraph (g) of this AD have been done. Repeat the inspection specified in paragraph (g) of this AD thereafter at the intervals specified in paragraph (g) of this AD.
(2) This paragraph restates the parts installation limitation specified in paragraph (k)(2) of AD 2013-16-08, Amendment 39-17546 (78 FR 51055, August 20, 2013), with a revised part name. As of the effective date of this AD, no person may install on any airplane an MLG dressed shock strut having any part number and serial number identified in paragraph 1.A., Effectivity, of Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 26, 2012, unless that retraction actuator assembly has been inspected and all applicable corrective actions have been done, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 26, 2012.
