Airworthiness Directive · Amendment 39-16612 · Engine controls
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category, having an engine throttle control gearbox (TCGB) with part number 2100140-003, 2100140-005, or 2100140-007 installed.
Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (n)(1) of this AD. The request should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane.
We are superseding an existing airworthiness directive (AD) that applies to the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For airplanes having serial numbers (S/Ns) 7003 through 7067 inclusive, and 7069 and subsequent: At the applicable time specified in paragraph (g)(1) or (g)(2) of this AD, do a detailed inspection for wear of the left and right engine throttle control gearboxes having part number (P/N) 2100140-005 or 2100140-007 by doing all the actions per Part A, paragraphs A., B., and C.(1) through C.(4), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010. If the wear value is the same as that specified in Part A, paragraph B.(8), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010; repeat the inspection thereafter at intervals not to exceed 1,000 flight hours. As of the effective date of this AD, only Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, may be used. Doing the inspection required by paragraph (k) of this AD terminates the requirement in this paragraph.
(1) For airplanes having S/Ns 7003 through 7067 inclusive and 7069 through 7999 inclusive: Within 1,000 flight hours or 90 days after March 25, 2004 (the effective date of AD 2004-05-12), whichever is later.
(2) For airplanes having S/Ns 8000 and subsequent: Within 1,000 flight hours or 90 days after April 1, 2005 (the effective date of AD 2005-06-04), whichever is later.
Note 2: For the purposes of this AD, a detailed inspection is: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”
If the wear value found during any inspection required by paragraph (g) of this AD is not the same as that specified in Part A, paragraph B.(8), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010: Do the applicable actions required by paragraph (h)(1), (h)(2), or (h)(3) of this AD, at the time specified, per the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010. Repeat the inspection required by paragraph (g) of this AD thereafter at intervals not to exceed 1,000 flight hours. As of the effective date of this AD, only Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, may be used. Doing the inspection required by paragraph (k) of this AD terminates the inspection requirements of this paragraph.
(1) If the wear value on one or both of the gearboxes is the same as that specified in Part A, paragraph B.(5), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010: Before further flight, replace the affected gearbox with a new or serviceable gearbox, by doing all the actions per Part B, paragraphs D. through F.(7), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010. As of the effective date of this AD, only Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, may be used.
(2) If the wear value on both the left and right gearboxes is the same as that specified in Part A, paragraph B.(6), of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010: Before further flight, replace the gearbox having the higher wear value with a new or serviceable gearbox, by doing all the actions per Part B, paragraphs D. through F.(7), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010. Within 1,000 flight hours after doing the replacement, replace the other gearbox. As of the effective date of this AD, only Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, may be used.
(3) If the wear value on only one gearbox is the same as that specified in Part A, paragraph B.(7), and the wear value on the other gearbox is the same as that specified in Part A, paragraph B.(8), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010: Within 1,000 flight hours after the inspection, replace the gearbox with the wear value that is the same as that specified in Part A, paragraph B.(7), with a new or serviceable gearbox. Do the replacement by doing all the actions per Part B, paragraphs D. through F.(7), of the Accomplishment Instructions of Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; or Revision D, dated September 23, 2010. As of the effective date of this AD, only Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, may be used.
Note 3: Bombardier Service Bulletin 601R-76-019, dated August 21, 2003; Revision `A,' dated February 19, 2004; Revision B, dated February 16, 2005; Revision C, dated July 5, 2007; and Revision D, dated September 23, 2010; reference Trans Digm, Inc., AeroControlex Group Service Bulletin 2100140-007-76-04, dated July 22, 2003, as an additional source of guidance for accomplishment of the inspections and replacement.
(i) At the applicable time specified in paragraph (i)(1) or (i)(2) of this AD, submit a report of gearbox wear to Bombardier Aerospace, In-Service Engineering (Engine Group); fax (514) 855-7708. The report must include the airplane serial number, the number of flight hours on the airplane, and the number of flight hours on each gearbox (if different than the number of flight hours on the airplane).
(1) For Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7003 through 7067 inclusive, and 7069 through 7999 inclusive: Submit a report within 10 days after doing the inspection required by paragraph (g) of this AD, or within 10 days after March 25, 2004, whichever is later.
(2) For Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 8000 and subsequent: Submit a report within 10 days after doing the inspection required by paragraph (g) of this AD, or within 10 days after April 1, 2005 (the effective date of AD 2005-06-04), whichever is later.
For all airplanes: Within 30 days after the effective date of this AD, revise the maintenance program to include new CMR Task C76-11-127-01 specified in Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010; to Appendix A—Certification Maintenance Requirements, of Part 2 of the Bombardier CL-600-2B19 Maintenance Requirements Manual.
Note 4: The actions required by paragraph (j) of this AD may be done by inserting a copy of Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010; into the AWL section of Appendix A—Certification Maintenance Requirements, of Part 2 of the Bombardier CL-600-2B19 Maintenance Requirements Manual. When this temporary revision has been included in the limitation section of the general revisions of the document, the general revisions may be inserted in the document, provided the relevant information (CMR Task C76-11-127-01) in the general revision is identical to that in Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010.
(k) For CMR Task C76-11-127-01 identified in Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010; do the initial inspection within 1,000 flight hours after the effective date of this AD. Doing the initial inspection required by this paragraph terminates the requirements of paragraph (g) of this AD and the inspection requirements of paragraph (h) of this AD.
(l) Thereafter, except as provided by paragraph (n) of this AD, no alternative intervals may be approved for CMR Task C76-11-127-01 identified in Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010; which require a special detailed inspection of the throttle control gearbox for gear and rack teeth wear.
(m) Accomplishment of the actions specified in paragraphs (g) and (h) of this AD before the effective date of this AD according to Bombardier Service Bulletin 601R-76-019, Revision C, dated July 5, 2007, is acceptable for compliance with the corresponding requirements of this AD.
Note 5: This AD differs from the MCAI and/or service information as follows: No differences.
