88 FR 25 pgs. 7856-7859 - Airworthiness Directives; Bombardier, Inc., Airplanes
Type: RULEVolume: 88Number: 25Pages: 7856 - 7859
Pages: 7856, 7857, 7858, 7859Docket number: [Docket No. FAA-2022-1251; Project Identifier MCAI-2022-00588-T; Amendment 39-22308; AD 2023-02-01]
FR document: [FR Doc. 2023-02525 Filed 2-6-23; 8:45 am]
Agency: Transportation Department
Sub Agency: Federal Aviation Administration
Official PDF Version: PDF Version
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1251; Project Identifier MCAI-2022-00588-T; Amendment 39-22308; AD 2023-02-01]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY:
Federal Aviation Administration (FAA), Department of Transportation (DOT).
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by an investigation that indicated that one of the springs in the pitch trim switch of the horizontal stabilizer had failed. The failure of the spring could result in the airplane pitching nose down when actually commanded nose up. This AD requires a verification of the serial numbers of certain pitch trim switches, and replacement of the affected pitch trim switches with new ones in the pilot and co-pilot control wheels. This AD would also prohibit the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective March 14, 2023.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of March 14, 2023.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2022-1251; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
• For service information identified in this final rule, contact Bombardier Business Aircraft Customer Response Center, 400 Côte Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 1-514-855-2999; email ac.yul@aero.bombardier.com; internet bombardier.com.
• 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. It is also available at regulations.gov under Docket No. FAA-2022-1251.
FOR FURTHER INFORMATION CONTACT:
Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Bombardier, Inc., Model BD-100-1A10 airplanes. The NPRM published in the Federal Register on October 5, 2022 (87 FR 60352). The NPRM was prompted by AD CF-2022-24, dated May 2, 2022, (referred to after this as the MCAI) issued by Transport Canada, which is the aviation authority for Canada. The MCAI states that during several in-service events, following a stab trim fault advisory message and an auto-pilot disconnect, both pilot and co-pilot commands to trim the horizontal stabilizer nose-up resulted in a nose-down movement of the horizontal stabilizer. In two events, the horizontal stabilizer reached the full travel nose-down position before the crew recognized the nature of the problem, and quickly recovered control of the airplane for safe landing. As a result, this led to increased crew workload and reduced safety margins.
Subsequent investigation by Bombardier and the supplier of the horizontal stabilizer pitch trim switch determined that one of the springs within the pitch trim switch had failed. The supplier of the springs was changed in 2019. The majority of observed pitch trim switch failures occurred in pitch trim switches that were manufactured after 2019.
In the NPRM, the FAA proposed to require the replacement of the affected pitch trim switches with re-designed pitch trim switches that have reliable springs. The FAA is issuing this AD to address the failure of the springs in the pitch trim switch, which, if not corrected, could result in the airplane pitching nose down when actually commanded nose up, resulting in reduced controllability of the airplane and high control forces. The FAA is issuing this AD to address the failure of the springs in the pitch trim switch. The unsafe condition, if not corrected, could result in the airplane pitching nose down when actually commanded nose up, resulting in reduced controllability of the airplane and high control forces.
You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA-2022-1251.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from NetJets. The following presents the comment received on the NPRM and the FAA's response.
Request To Correct the Date for Bombardier Service Bulletin 350-27-011
NetJets requested that the proposed AD be revised to correct the date for Bombardier Service Bulletin 350-27-011. The date was entered incorrectly in figure 1 to paragraph (h) of the proposed AD and two times in paragraph (i) of the proposed AD as "March 21, 2002."
The FAA agrees with the requested change by the commenter. The FAA has corrected the date for Bombardier Service Bulletin 350-27-011 in figure 1 to paragraph (h) of this AD and two times in paragraph (i) of this AD to "March 21, 2022."
Conclusion
[top] This product has been approved by the aviation authority of another country and is approved for operation in the United States. Pursuant to the FAA's bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA reviewed the relevant data, considered the comment received, and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on this product. Except for
Related Service Information Under 1 CFR Part 51
The FAA reviewed Bombardier Service Bulletin 100-27-21, dated March 21, 2022, for Model BD-100-1A10 (CH-300) airplanes, S/Ns 20003 to 20500. This service information specifies procedures for verifying serial numbers (S/Ns) of certain pitch trim switch part numbers in the pilot and co-pilot control wheels, and replacing affected pitch trim switches.
The FAA has also requires Bombardier Service Bulletin 350-27-011, dated March 21, 2022, for Model BD-100-1A10 (CH-350) airplanes, S/Ns 20501 to 20936. This service information describes procedures for verifying S/Ns of certain pitch trim switch part numbers in leather and non-leather covered pilot and co-pilot control wheels, and replacing affected pitch trim switches.
This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
Costs of Compliance
The FAA estimates that this AD affects 697 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:
| Action | Labor cost | Parts | Cost per product |
|---|---|---|---|
| Switch inspection | 1 work-hour × $85 per hour = $85 | N/A | $59,245 |
The FAA estimates the following costs to do any necessary on-condition actions that would be required based on the results of any required actions. The FAA has no way of determining the number of aircraft that might need these on-condition actions:
| Action | Labor cost | Parts | Cost per product |
|---|---|---|---|
| Switch replacement (Airplane S/Ns 20003-20500) | 4 work-hours × $85 per hour = $340 | $2,352 | $2,692 |
| Switch replacement (Airplane S/Ns 20501-20936) | 4 work-hours × $85 per hour = $340 | 2,442 | 2,782 |
The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs, describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
Regulatory Findings
This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a "significant regulatory action" under Executive Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39-AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority:
49 U.S.C. 106(g), 40113, 44701.
§?39.13 [Amended]
2. The FAA amends §?39.13 by adding the following new airworthiness directive:
2023-02-01 Bombardier, Inc.: Amendment 39-22308; Docket No. FAA-2022-1251; Project Identifier MCAI-2022-00588-T.
(a) Effective Date
This airworthiness directive (AD) is effective March 14, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Bombardier, Inc., Model BD-100-1A10 airplanes, all serial numbers, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 27, Flight Controls.
(e) Unsafe Condition
[top] This AD was prompted by the investigation that one of the springs in the pitch trim switch for the horizontal stabilizer had failed. The FAA is issuing this AD to address the
(f) Compliance
Comply with this AD within the compliance times specified, unless already done.
(g) Review of the Airplane Records
Within 200 flight hours or 6 months, whichever occurs first, from the effective date of this AD, review the airplane (technical) records for the horizontal stabilizer pitch trim switches and control wheels to determine the date of replacement, if any, of the pilot or co-pilot trim switch and control wheels.
(1) If the pilot or co-pilot pitch trim switch or control wheels were removed after January 1, 2019, and the replacement pitch trim switches have serial numbers 02000 and subsequent, then no further action is required other than compliance with paragraph (j) of this AD.
(2) For airplanes with serial numbers (S/Ns) 20003 through 20780 inclusive: If no pilot or co-pilot pitch trim switch or control wheel was replaced after January 1, 2019, then no further action is required other than compliance with paragraph (j) of this AD.
(3) For airplanes with S/Ns 20901 through 20936 inclusive: If no pilot or co-pilot pitch trim switch or control wheel has been replaced on an airplane, then no further action is required other than compliance with paragraph (j) of this AD.
(h) Verification and Replacement of Pitch Trim Switches
For airplanes not identified in paragraphs (g)(1) through (3) of this AD: Within 200 flight hours or 6 months, whichever occurs first, from the effective date of this AD, identify the serial numbers of both the pilot and co-pilot pitch trim switches, and do the applicable actions specified in paragraph (h)(1) or (2) of this AD.
(1) If the pilot or co-pilot pitch trim switch has a serial number that is not listed in figure 2 to paragraph (h) of this AD, before further flight re-install the pitch trim switch in accordance with Section 2.B. of the Accomplishment Instructions of the applicable service information identified in figure 1 to paragraph (h) of this AD.
(2) If the pilot or co-pilot pitch trim switch has a serial number listed in figure 2 to paragraph (h) of this AD, before further flight, replace the pitch trim switch in accordance with Section 2.B. of the Accomplishment Instructions of the applicable service information identified in figure 1 to paragraph (h) of this AD.
(3) Before further flight perform the operational test in accordance with Section 2.C. of the Accomplishment Instructions of the applicable service information identified Bombardier SB listed in figure 1 to paragraph (h) of this AD.
[Federal Register graphic "ER07FE23.042" is not available. Please view the graphic in the PDF version of this document.]
[Federal Register graphic "ER07FE23.043" is not available. Please view the graphic in the PDF version of this document.]
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(i) Verification/Replacement of Pitch Trim Switches for Airplanes With S/Ns 20501 and Subsequent With Certain Control Wheel P/Ns 83912156 and 83912157
For airplanes with S/Ns 20501 and subsequent with leather-covered control wheels, pilot control wheel P/N 83912156, or co-pilot control wheel P/N 83912157: Within 200 flight hours or 6 months, whichever occurs first, from the effective date of this AD, remove and inspect both the pilot and co-pilot pitch trim switches to determine the part number of the pitch trim switch in accordance with Section 2.B. of the Accomplishment Instructions of Bombardier Service Bulletin 350-27-011, dated March 21, 2022.
(1) If pitch trim switch P/N 83452541 or P/N 83452548 is found installed in either the pilot or the co-pilot control wheel, before further flight, replace the pitch trim switch with pitch trim switch P/N 83452548, serial number 02000 and subsequent, in accordance with Section 2.B. of the Accomplishment Instructions of the applicable service information identified in figure 1 to paragraph (h) of this AD.
(2) Before further flight thereafter perform the operational test in accordance with Section 2.C. of the Accomplishment Instructions of Bombardier Service Bulletin 350-27-011, dated March 21, 2022.
(j) Parts Installation Prohibition
As of the effective date of this AD, no person may install, on any airplane, a trim switch P/N 83452548 or P/N 83452541 with any serial number listed in figure 2 to paragraph (h) of this AD.
(k) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO 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 certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300. 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, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature.
(l) Additional Information
(1) Refer to Transport Canada AD CF-2022-24, dated May 2, 2022, for related information. This Transport Canada AD may be found in the AD docket at regulations.gov under Docket No. FAA-2022-1251.
(2) For more information about this AD, contact Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347; email 9-avs-nyaco-cos@faa.gov.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the incorporation by reference 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 Service Bulletin 350-27-011, Basic Issue, dated March 21, 2022.
(ii) Bombardier Service Bulletin 100-27-21, Basic Issue, dated March 21, 2022.
(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 1-514-855-2999; email ac.yul@aero.bombardier.com; internet 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 service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email fr.inspection@nara.gov, or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued on January 18, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service.
[FR Doc. 2023-02525 Filed 2-6-23; 8:45 am]
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