Source: https://www.federalregister.gov/documents/2011/02/24/2011-4012/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
Timestamp: 2017-11-23 09:49:29
Document Index: 243152828

Matched Legal Cases: ['art 39', 'art 2', 'art 2', '§\u200939', 'art 2', 'art 2', 'art 2', 'art 2']

76 FR 10216
10216-10220 (5 pages)
Amendment 39-16612
AD 2011-05-03
https://www.federalregister.gov/d/2011-4012 https://www.federalregister.gov/d/2011-4012
There has been numerous reported failures of the Regional Jet engine TCGB [throttle control gearbox] P/Ns: 2100140-003, 2100140-005 & 2100140-007. Some of these failures have resulted in in-flight engine shutdowns. Post incident investigations revealed that excessive wear within the Start Printed Page 10217engine TCGB could alter the rigging position or cause the throttle to jam. With the rigging position altered, movement of the throttle lever towards the idle position can result in throttle moving too close to the fuel shut-off position, which potentially, can cause the engine to flame out.
Rocco Viselli, Senior Aviation Safety Engineer, Avionic & Flight Test Branch, ANE-172, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7331; fax (516) 794-5531; e-mail Rocco.Viselli@faa.gov.
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on October 21, 2010 (75 FR 64960), and proposed to supersede AD 2005-06-04, Amendment 39-14012 (70 FR 12963, March 17, 2005). That NPRM proposed to correct an unsafe condition for the specified products.
Since we issued AD 2005-06-04, the inspection for the throttle control gearbox (TCGB) required by that AD has been transcribed in a new certification maintenance requirement (CMR) task. This AD mandates the incorporation of new CMR Task C76-11-127-01 into the Bombardier CL-600-2B19 Maintenance Requirements Manual (MRM) as introduced by Bombardier Temporary Revision 2A-47. Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF-2004-01R2, dated September 29, 2009 (referred to after this as “the MCAI”), to correct an unsafe condition for the specified products. The MCAI states:
The subject TCGB inspection requirements mandated as per the earlier versions of this [Canadian] AD, are now transcribed in a new Certification Maintenance Requirement (CMR) task. This revision is issued to mandate the incorporation of the new CMR task [Task C76-11-127-01] into the CL-600-2B19 Maintenance Requirements Manual (MRM), as introduced by the MRM Temporary Revision (TR) 2A-47.
The NPRM referred to Bombardier Service Bulletin 601R-76-019, Revision C, dated July 5, 2007, as the appropriate source of service information for accomplishing certain proposed actions. Bombardier Inc. has issued Service Bulletin 601R-76-019, Revision D, dated September 23, 2010. This service bulletin does not add any work for the affected airplanes. We have revised this final rule to refer to Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010, as the appropriate source of service information for accomplishing the applicable actions.
We have added new paragraph (m) to this final rule to give credit to operators for accomplishing the applicable actions before the effective date of this AD in accordance with Bombardier Service Bulletin 601R-76-019, Revision C, dated July 5, 2007. We have re-identified subsequent paragraphs accordingly.
The NPRM also referred to Bombardier Temporary Revision 2A-47, dated May 27, 2009, to Appendix A—Certification Maintenance Requirements, of Part 2 of the Bombardier CL-600-2B19 Maintenance Requirements Manual for incorporating new CMR Task C76-11-127-01 into the maintenance program. Bombardier Inc. has issued 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. Bombardier Temporary Revision 2A-53, dated December 15, 2010, was issued to revise the task description of CMR Task C76-11-127-01. We have revised this final rule to allow operators to use either Bombardier Temporary Revision 2A-47, dated May 27, 2009; or Bombardier Temporary Revision 2A-53, dated December 15, 2010; for revising the maintenance program to include CMR Task C76-11-127-01.
We estimate that this AD will affect about 638 products of U.S. registry.
The actions that are required by AD 2005-06-04 and retained in this AD take about 7 work-hours per product, at an average labor rate of $85 per work-hour. Based on these figures, the estimated cost of the currently required actions is $595 per product.
We estimate that it will take about 1 work-hour per product to comply with the new basic requirements of this AD. The average labor rate is $85 per work-Start Printed Page 10218hour. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $54,230, or $85 per product.
2. The FAA amends § 39.13 by removing Amendment 39-14012 (
2011-05-03 Bombardier, Inc.: Amendment 39-16612. Docket No. FAA-2010-1039; Directorate Identifier 2010-NM-002-AD.
(g) 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.
(2) For airplanes having S/Ns 8000 and subsequent: Within 1,000 flight hours or 90 Start Printed Page 10219days after April 1, 2005 (the effective date of AD 2005-06-04), whichever is later.
(h) 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.
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).
(j) 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.
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.
(1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Start Printed Page 10220Certification Office (ACO), ANE-170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the ACO, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone 516-228-7300; fax 516-794-5531. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. The AMOC approval letter must specifically reference this AD.
(o) Refer to MCAI Canadian Airworthiness Directive CF-2004-01R2, dated September 29, 2009; Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010; and 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; for related information.
(p) You must use Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010; and 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; as applicable; to do the actions required by this AD, unless the AD specifies otherwise.
[FR Doc. 2011-4012 Filed 2-23-11; 8:45 am]