AD 2007-05-11 Airworthiness Directives; Bombardier Model CL-600-2B16 (CL-604) Airplanes and Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

This AD applies to Bombardier Model CL-600-2B16 (CL-604) airplanes, serial numbers 5301 through 5665 inclusive; and Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7003 through 7990 inclusive and 8000 through 8066 inclusive; certificated in any category. Note 1: The Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes may be referred to by their marketing designations as RJ100, RJ200, RJ440, CRJ100, CRJ200, CRJ440, and CL-65.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Restatement of Certain Requirements of AD 98-13-24 Replacement of Horizontal Stabilizer Trim Control Unit (HSTCU) (f) For Model CL-600-2B19 (Regional Jet Series 100) airplanes, serial numbers 7003 through 7112 inclusive: Within 18 months after July 30, 1998 (the effective date of AD 98-13-24), replace the HSTCU with a new HSTCU having part number 601R92301-9, and reactivate the mach trim switch/light (if deactivated), in accordance with Bombardier Service Bulletin S.B. 601R-27-053, Revision B, dated February 21, 1997. Doing paragraph (o) of this AD terminates the requirements of this paragraph. Note 2: Accomplishment of paragraph (f) of this AD, prior to July 30, 1998, in accordance with Bombardier Service Bulletin S.B. 601R-27-053, dated May 27, 1996; or Revision A, dated August 26, 1996; is considered acceptable for compliance with the applicable actions specified in paragraph (f) of this AD. Restatement of Certain Requirements of AD 2006-22-06 Airplane Flight Manual (AFM) Revisions (g) Within 14 days after November 14, 2006 (the effective date of AD 2006-22-06), make the applicable AFM revisions specified in paragraph (g)(1) or (g)(2) of this AD by incorporating the applicable Canadair (Bombardier) temporary revisions (TRs) identified in Table 1 of this AD into the applicable AFM. Doing the revision specified in paragraph (m) of this AD terminates the requirements of this paragraph for those airplanes only. (1) For Model CL-600-2B16 (CL-604) airplanes: Revise the Emergency and Abnormal Procedures sections of the AFM to advise the flightcrew of additional procedures to follow in the event of stabilizer trim runaway and to advise the flightcrew of revised procedures to follow in the event of MACH TRIM, STAB TRIM, and horizontal stabilizer trim malfunctions. (2) For Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes: Revise the Emergency and Abnormal Procedures sections of the AFM to advise the flightcrew of revised procedures to follow in the event of stabilizer trim runaway and in the event of MACH TRIM, STAB TRIM, and horizontal stabilizer trim malfunctions. Table 1—TRs For Bombardier Model— Use— Dated— To the— CL-600-2B16 (CL-604) airplanes Canadair Challenger TR 604/21-1 October 3, 2006 Canadair Challenger CL-604 AFM, PSP 604-1. CL-600-2B19 (Regional Jet Series 100 & 440) airplanes Canadair Regional Jet TR RJ/152-5 October 3, 2006 Canadair Regional Jet AFM, CSP A-012. (h) When the applicable TR specified in paragraph (g) of this AD has been included in the general revisions of the applicable AFM, those general revisions may be inserted into the AFM and the applicable TR may be removed, provided the relevant information in the general revisions is identical to that in the TR. Installation of Circuit Breaker Identification Collars (i) Within 14 days after November 14, 2006, install circuit breaker identification collars in accordance with Bombardier Modification Summary Package IS601R27410051, Revision C, dated September 29, 2006 (for Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes); or the Accomplishment Instructions of Bombardier Alert Service Bulletin A604-27-029, dated September 28, 2006 (for Model CL-600-2B16 (CL-604) airplanes); as applicable. Additional AFM Revision (j) For Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes: Within 14 days after November 14, 2006, revise the Normal section of the Canadair Regional Jet AFM, CSP A-012, to include the statement specified in Figure 1 of this AD. This may be done by inserting a copy of Figure 1 of this AD into the AFM. “Prior to the flightcrew's first flight of the day, do the following actions: 1. Review the location of the STAB CH1 HSTCU and STAB CH2 HSTCU circuit breakers. 2. Complete a functional check of the stabilizer trim system as detailed below.       Control Wheel Stab Trim Disconnect Check Control Wheel Stab Trim Disconnect switches . . . . Check • Make sure STAB TRIM caution message is out.   • Activate the pilot's Control Wheel Stab Trim Disconnect switch and make sure the STAB TRIM caution message comes on. NOTE: During ground testing only, do not activate the Control Wheel Stab Trim Disconnect switch if the horizontal stabilizer trim is in motion. • Engage the STAB TRIM switches and make sure the STAB TRIM caution message is out. • Activate the co-pilot's Control Wheel Stab Trim Disconnect switch and make sure the STAB TRIM caution message comes on. • Engage the STAB TRIM and MACH TRIM switches and make sure the STAB TRIM and MACH TRIM caution messages are out.” Figure 1 Note 3: When a statement identical to that in paragraph (j) of this AD has been included in the general revisions of the applicable AFM, those general revisions may be inserted into the AFM, and the copy of this AD may be removed from the AFM. (k) For Model CL-600-2B16 (CL-604) airplanes: Within 14 days after November 14, 2006, revise the Normal section of the Canadair Challenger CL-604 AFM, PSP 604-1, to include the following statement. This may be done by inserting a copy of this AD into the AFM. “Prior to the flightcrew's first flight of the day, do the following actions: 1. Review the location of the STAB CH1 HSTCU and STAB CH2 HSTCU circuit breakers. 2. Check the stabilizer trim system as detailed in CL-604 AFM ‘Normal Procedures’ section titled ‘Flight Controls Trim Systems, Before Flight—First Flight of the Day.’ ” Note 4: When a statement identical to that in paragraph (k) of this AD has been included in the general revisions of the applicable AFM, those general revisions may be inserted into the AFM, and the copy of this AD may be removed from the AFM. Previous Actions Accomplished According to Modification Summary Package (l) Actions accomplished before November 14, 2006, in accordance with Bombardier Modification Summary Package IS601R27410051, Revision A, dated September 18, 2006; or Revision B, dated September 27, 2006; are considered acceptable for compliance with the action specified in paragraph (i) of this AD, provided that the circuit breaker collars meet the color requirements of Bombardier Modification Summary Package IS601R27410051, Revision C, dated September 29, 2006. New Requirements of This AD New Revised AFM Revisions (m) Within 14 days after the effective date of this AD, make the applicable AFM revisions specified in paragraph (m)(1) or (m)(2) of this AD by incorporating the applicable Canadair (Bombardier) TRs identified in Table 2 of this AD into the applicable AFM, and after doing the revision, remove the applicable AFM revision required by paragraph (g) of this AD from the applicable AFM. Doing the applicable revision specified in this paragraph terminates the requirements of paragraph (g) for that airplane. (1) For Model CL-600-2B16 (CL-604) airplanes: Revise the Emergency and Abnormal Procedures sections of the AFM to advise the flightcrew of procedures to follow in the event of stabilizer trim runaway and in the event of MACH TRIM, STAB TRIM, and horizontal stabilizer trim malfunctions. (2) For Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes: Revise the Emergency and Abnormal Procedures sections of the AFM to advise the flightcrew of revised procedures to follow in the event of stabilizer trim runaway and in the event of MACH TRIM, STAB TRIM, and horizontal stabilizer trim malfunctions. Table 2.—Revised TRs For Bombardier Model— Use— Dated— To the— CL-600-2B16 (CL-604) airplanes Canadair Challenger TR 604/21-2 January 30, 2007 Canadair Challenger CL-604 AFM, PSP 604-1. CL-600-2B19 (Regional Jet Series 100 & 440) airplanes Canadair Regional Jet TR RJ/152-6 January 26, 2007 Canadair Regional Jet AFM, CSP A-012. (n) When the applicable TR specified in paragraph (m) of this AD has been included in the general revisions of the applicable AFM, those general revisions may be inserted into the AFM and the applicable TR may be removed. Terminating Action—Installation of New, Improved Part (o) Within 9 months after the effective date of this AD, install HSTCU, part number (P/N) 601R92301-15 (vendor P/N 7060-10) or higher dash number, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A604-27-029, dated September 28, 2006 (for Model CL-600-2B16 (CL-604) airplanes); or Bombardier Service Bulletin 601R-27-147, dated September 28, 2006 (for Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes); as applicable. Doing this installation terminates the requirements of paragraph (f) of this AD. After doing this installation, the circuit breaker identification collars required by paragraph (i) of this AD may be removed. After doing this installation, the requirements specified in paragraphs (o)(1) and (o)(2) of this AD must be followed. (1) Within 14 days after doing the installation or within 14 days after the effective date of this AD, whichever occurs later, the AFM revisions required by paragraphs (j) and (k) of this AD must be removed from the AFM. Note 5: It is recommended for Model CL-600-2B16 (CL-604) operators that the functional check of the stabilizer trim system on the aircraft's first flight of the day continue to be performed in accordance with the Normal Procedures Section of the Canadair Challenger CL-604 AFM. (2) After doing the installation, the AFM revisions required by paragraph (g) of this AD may be removed from the applicable AFM, but only if the removal of the AFM revisions was done before the effective date of this AD. Note 6: Bombardier Service Bulletin 601R-27-147, dated September 28, 2006, refers to Sagem Service Bulletin HSTCU-27-011, dated September 22, 2006, as an additional source of service information for accomplishment of the installation. Service Bulletin Exception (p) Although Bombardier Alert Service Bulletin A604-27-029, dated September 28, 2006, specifies to return certain parts to the manufacturer, this AD does not include that requirement. Alternative Methods of Compliance (AMOCs) (q)(1) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with § 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (r) Canadian airworthiness directives CF-2006-20R1, dated October 4, 2006, and CF-2006-21R1, dated October 3, 2006, also address the subject of this AD. Material Incorporated by Reference (s) You must use Bombardier Modification Summary Package IS601R27410051, Revision C, dated September 29, 2006; the service bulletins listed in Table 3 of this AD; and the temporary revisions listed in Table 4 of this AD; as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. Table 3.—Service Bulletins Incorporated by Reference Service bulletin Revision level Date Bombardier Alert Service Bulletin A604-27-029 Original September 28, 2006. Bombardier Service Bulletin S.B. 601R-27-053 B February 21, 1997. Bombardier Service Bulletin 601R-27-147 Original September 28, 2006. Table 4.—All Temporary Revisions Incorporated by Reference Temporary revision— Dated— To the— Canadair Challenger Temporary Revision 604/21-1 October 3, 2006 Canadair Challenger CL-604 Airplane Flight Manual, PSP 604-1. Canadair Challenger Temporary Revision 604/21-2 January 30, 2007 Canadair Challenger CL-604 Airplane Flight Manual, PSP 604-1. Canadair Regional Jet Temporary Revision RJ/152-5 October 3, 2006 Canadair Regional Jet Airplane Flight Manual, CSP A-012. Canadair Regional Jet Temporary Revision RJ/152-6 January 26, 2007 Canadair Regional Jet Airplane Flight Manual, CSP A-012. (1) The Director of the Federal Register approved the incorporation by reference of the temporary revisions listed in Table 5 of this AD in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Table 5.—New Temporary Revisions Incorporated by Reference Temporary revision— Dated— To the— Canadair Challenger Temporary Revision 604/21-2 January 30, 2007 Canadair Challenger CL-604 Airplane Flight Manual, PSP 604-1. Canadair Regional Jet Temporary Revision RJ/152-6 January 26, 2007 Canadair Regional Jet Airplane Flight Manual, CSP A-012. (2) On November 14, 2006 (71 FR 63219, October 30, 2006), the Director of the Federal Register approved the incorporation by reference of Bombardier Alert Service Bulletin A604-27-029, dated September 28, 2006; Bombardier Service Bulletin 601R-27-147, dated September 28, 2006; Bombardier Modification Summary Package IS601R27410051, Revision C, dated September 29, 2006; and the temporary revisions listed in Table 6 of this AD in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Table 6.—Previous Temporary Revisions Incorporated by Reference Temporary revision— Dated— To the— Canadair Challenger Temporary Revision 604/21-1 October 3, 2006 Canadair Challenger CL-604 Airplane Flight Manual, PSP 604-1. Canadair Regional Jet Temporary Revision RJ/152-5 October 3, 2006 Canadair Regional Jet Airplane Flight Manual, CSP A-012. (3) On July 30, 1998 (63 FR 34574, June 25, 1998), the Director of the Federal Register approved the incorporation by reference of Bombardier Service Bulletin S.B. 601R-27-053, Revision B, dated February 21, 1997; in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (4) Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, for a copy of this service information. You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html . Issued in Renton, Washington, on February 21, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-3661 Filed 3-2-07; 8:45 am] BILLING CODE 4910-13-P

This AD results from reports of trim problems including uncommanded trim, trim in the opposite direction to that selected, loss of trim position indication and, in one case, potential loss of trim disconnect capability. We are issuing this AD to prevent these events, which could result in conditions that vary from reduced controllability of the airplane to loss of control of the airplane.