2023-23-05: Flight Controls

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2023-23-05 Bombardier, Inc.: Amendment 39-22607; Docket No. FAA-2023-2152; Project Identifier MCAI-2023-00798-T. (a) Effective Date This airworthiness directive (AD) is effective December 14, 2023. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20936 inclusive. (d) Subject Air Transport Association (ATA) of America Code 31, Indicating/Recording System; 27, Flight Controls. (e) Reason This AD was prompted by a design review of the avionic architecture of the pitch trim indication and alerting system that revealed software errors could generate misleading pitch trim indication to the crew, leading to incorrect horizontal stabilizer positioning at takeoff. The FAA is issuing this AD to ensure the horizontal stabilizer is correctly configured prior to takeoff. The unsafe condition, if not addressed, could result in an extreme pitch oscillation and subsequent loss of control of the airplane and serious injury to passengers. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Revision of Existing Airplane Flight Manual (AFM) Within 60 days after the effective date of this AD, revise the Emergency Procedures in Section 03-35, and the Normal Procedures in Section 04-02, of the existing AFM to include the information specified in the service information identified in paragraph (g)(1) or (2), as applicable. (1) Bombardier Challenger 300 Temporary Revision TR-94-1, to Airplane Flight Manual (AFM) CSP 100-1, dated February 6, 2023; or Bombardier Challenger 300 Temporary Revision TR-94-1, to AFM CSP 100-1 (Metric), dated February 6, 2023. (2) Bombardier Challenger 350 Temporary Revision TR-25-1, to AFM CH 350, dated February 6, 2023; or page 03-35-1, in checklist "Takeoff Configuration Warnings," of Chapter 3, "Emergency Procedures," and page 04-02-10, in checklist "Before Starting Engines," of Chapter 4, "Normal Procedures," of the Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38, dated May 11, 2023. Note 1 to paragraph (g)(2): For obtaining the checklists for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use Document Identification No. CH 350 AFM. (h) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation Branch, 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, mail it to the address identified in paragraph (i)(2) of this AD. Information may be emailed to: [email protected]. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or Transport Canada; or Bombardier's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (i) Additional Information (1) Refer to Transport Canada AD CF-2023-48R1, dated September 29, 2023, for related information. This Transport Canada AD may be found in the AD docket at regulations.gov under Docket No. FAA-2023-2152. (2) For more information about this AD, contact Gabriel Kim, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email [email protected]. (j) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) Bombardier Challenger 300 Temporary Revision TR-94-1, to Airplane Flight Manual (AFM) CSP 100-1, dated February 6, 2023. (ii) Bombardier Challenger 300 Temporary Revision TR-94-1, to AFM CSP 100-1 (Metric), dated February 6, 2023. (iii) Bombardier Challenger 350 Temporary Revision TR-25-1, to AFM CH 350, dated February 6, 2023. (iv) "Takeoff Configuration Warnings," of Chapter 3, "Emergency Procedures," of the Bombardier Challenger 350 Airplane Flight Manual (AFM), Publication No. CH 350 AFM, Revision 38, dated May 11, 2023. Note 2 to paragraph (j)(2)(iv): For obtaining the checklists specified in paragraphs (j)(2)(iv) and (v) of this AD for the Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use Document Identification No. CH 350 AFM. (v) "Before Starting Engines," of Chapter 4, "Normal Procedures," of the Bombardier Challenger 350 AFM, Publication No. CH 350, Revision 38, dated May 11, 2023. (3) For service information identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-2999; email [email protected]; website bombardier.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected]. Issued on November 16, 2023. Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2023-26257 Filed 11-24-23; 5:00 pm]BILLING CODE 4910-13-P