Airworthiness Directive · Amendment 39-17521 · Flight controls
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category, equipped with Eaton flap actuators having any part number (P/N) specified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD.
(1) P/N 601R93101-23/-25 (vendor P/N 852D100-23, -25).
(2) P/N 601R93103-23/-24 (vendor P/N 853D100-23, -24).
(3) P/N 601R93104-23/-24 (vendor P/N 854D100-23, -24).
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by a determination that certain flap actuators require restoration by installing a redesigned flap actuator inboard pinion seal. This AD requires revising the maintenance program by incorporating new airworthiness limitation tasks. We are issuing this AD to prevent flap system failure, and consequent reduced control of the airplane.
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 30 days after the effective date of this AD, revise the maintenance program to incorporate Tasks C27-50-111-15 and C27-50-111-17 of Bombardier CL-600-2B19 Temporary Revision (TR) 2A-48, dated July 6, 2012, to Appendix A—Certification Maintenance Requirements, of Part 2, Airworthiness Requirements, of the Bombardier CL-600-2B19 Maintenance Requirements Manual (MRM), except as specified in paragraph (j) of this AD. The initial compliance times for the tasks are specified in paragraph (h) of this AD.
Note 1 to paragraph (g) of this AD: The maintenance program revision required by paragraph (g) of this AD may be done by inserting a copy of Bombardier CL-600-2B19 TR 2A-48, dated July 6, 2012, into Appendix A—Certification Maintenance Requirements, of Part 2, Airworthiness Requirements, of the Bombardier CL-600-2B19 MRM. When this TR has been included in general revisions of the MRM, the general revisions may be inserted in the MRM, provided the relevant information in the general revision is identical to that in Bombardier CL-600-2B19 TR 2A-48, dated July 6, 2012.
For the inboard and outboard flap actuators identified in Bombardier CL-600-2B19 TR 2A-48, dated July 6, 2012, to Appendix A—Certification Maintenance Requirements, of Part 2, Airworthiness Requirements, of the Bombardier CL-600-2B19 MRM, the initial compliance times for the tasks specified in Bombardier CL-600-2B19 TR 2A-48, dated July 6, 2012, are the applicable times specified in paragraphs (h)(1) through (h)(4) of this AD.
(1) For flap actuators that have accumulated less than 6,000 flight cycles as of the effective date of this AD, before the accumulation of 10,000 flight cycles on the flap actuator.
(2) For flap actuators that have accumulated 6,000 or more flight cycles but less than 10,000 flight cycles as of the effective date of this AD, within 4,000 flight cycles after the effective date of this AD, but no later than 12,000 flight cycles on the flap actuator.
(3) For flap actuators that have accumulated 10,000 or more flight cycles but less than or equal to 12,000 flight cycles as of the effective date of this AD, within 2,000 flight cycles after the effective date of this AD, but no later than 13,000 flight cycles on the flap actuator.
(4) For flap actuators that have accumulated more than 12,000 flight cycles as of the effective date of this AD, within 1,000 flight cycles after the effective date of this AD.
Where Bombardier CL-600-2B19 TR 2A-48, dated July 6, 2012, to Appendix A—Certification Maintenance Requirements, of Part 2, Airworthiness Requirements, of the Bombardier CL-600-2B19 MRM, specifies a task interval of 10,000 flight cycles or 144 months, the task interval is 10,000 flight cycles.
After accomplishing the revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
