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before further flight: Do the related investigative/corrective actions in accordance with Part B or F of
the Accomplishment Instructions of Bombardier ASB A601R-32-088, including Appendices A and
C, dated February 20, 2003; or Bombardier ASB A601R-32-088, Revision A, dated June 16, 2005,
including Appendices A, B, and C, dated February 20, 2003. If an eddy current inspection (a related
investigative action specified in Part B) is used to confirm the detailed inspection findings, the next
eddy current required by paragraph (h) of this AD must be conducted within 500 flight cycles after
the eddy current inspection specified in this paragraph, and thereafter at intervals not to exceed 500
flight cycles until paragraph (k) of this AD is accomplished.
Eddy Current Inspection of Main Fittings of the MLGs
(h) At the time specified in paragraph (f) of this AD, do an eddy current inspection on the main
fittings of the MLGs to detect cracks, in accordance with Part B of the Accomplishment Instructions
of Bombardier ASB A601R-32-088, including Appendix A, dated February 20, 2003; or Bombardier
ASB A601R-32-088, Revision A, dated June 16, 2005, including Appendixes, A, B, and C, dated
February 20, 2003. Repeat the eddy current inspection thereafter at intervals not to exceed 500 flight
cycles, until paragraph (k) of this AD is accomplished. If any crack is found, before further flight,
replace the affected main fittings of the MLGs with new or serviceable fittings in accordance with
paragraph E.(5) of Part B of the Accomplishment Instructions of the service bulletin or in accordance
with paragraph (k) of this AD. If any crack is found after the effective date of this AD, do the
replacement in accordance with paragraph (k) of this AD.
Servicing of Shock Struts
(i) Before the accumulation of 2,500 total flight cycles on the MLGs, or within 500 flight cycles
after August 13, 2004, whichever occurs later, service the shock strut of the MLGs in accordance
with Part C or D, as applicable, of the Accomplishment Instructions of Bombardier ASB A601R-32-
088, including Appendix B, dated February 20, 2003; or Bombardier ASB A601R-32-088, Revision
A, dated June 16, 2005, including Appendices A, B, and C, dated February 20, 2003.
Shock Strut Inspection
(j) Within 500 flight cycles after completing the servicing required by paragraph (i) of this AD,
inspect the shock strut of the MLGs for nitrogen pressure, visible chrome dimension, and oil leakage,
in accordance with Part E of the Accomplishment Instructions of Bombardier ASB A601R-32-088,
including Appendix B, dated February 20, 2003; or Bombardier ASB A601R-32-088, Revision A,
dated June 16, 2005, including Appendices A, B, and C, dated February 20, 2003. Repeat the
inspection thereafter at intervals not to exceed 500 flight cycles, until paragraph (k) of this AD is
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24 BW 2007-04
accomplished. If the nitrogen pressure and visible chrome dimensions are found outside the limits
(the service bulletin refers to the airplane maintenance manual as the source of defined limits) and/or
oil leakage is found, before further flight, service the affected shock strut of the MLGs in accordance
with Part C or D, as applicable, of the Accomplishment Instructions of the service bulletin.
New Requirements of This AD
Replacement
(k) Within 39 months after the effective date of this AD: Replace the main fittings of the MLGs,
P/Ns 601R85001-81 and 601R85001-82 (Messier Dowty Incorporated P/Ns 17064-105 and 17064-
106), with new main fittings, P/Ns 601R85001-83 and 601R85001-84 (Messier Dowty Incorporated
P/Ns 17064-107 and 17064-108), in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 601R-32-093, Revision B, dated July 14, 2005. Doing this replacement
terminates all requirements of paragraphs (f), (g), (h), (i), and (j) of this AD.
Note 2: Bombardier Service Bulletin 601R-32-093, Revision B, refers to Messier-Dowty Service
Bulletin M-DT SB17002-32-25, Revision 1, dated October 17, 2003, as an additional source of
service information for replacing the main fittings.
Parts Installation
(l) As of the effective date of this AD, no person may install a main fitting of the MLG, P/Ns
601R85001-81 and 601R85001-82 (Messier Dowty Incorporated P/Ns 17064-105 and 17064-106),
on any airplane.
No Reporting Required
(m) Although the Accomplishment Instructions of Bombardier ASB A601R-32-088, dated
February 20, 2003; and ASB 601R-32-088, Revision A, dated June 16, 2005; specify to report certain
information to the manufacturer, this AD does not include that action.
Actions Accomplished in Accordance with Previous Revisions of Service Bulletin
(n) Actions accomplished before the effective date of this AD in accordance with the service
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