2022-11-12: Engine 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: 2022-11-12 Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.): Amendment 39-22062; Docket No. FAA-2022-0284; Project Identifier MCAI-2021-01369-A. (a) Effective Date This airworthiness directive (AD) is effective July 13, 2022. (b) Affected ADs None. (c) Applicability This AD applies to Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Model DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6-400 airplanes, serial numbers 001 through 989, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 7600, Engine Controls. (e) Unsafe Condition This AD was prompted by 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 identifies the unsafe condition as binding of the rod end bearing connecting the lower fuel control unit (FCU) push rod assembly to the FCU power lever. The unsafe condition, if not addressed, could lead to the inability to reduce power on the affected engine, which could result in an in-flight engine shutdown and reduced airplane control. (f) Definitions (1) For purposes of this AD, an "affected FCU pushrod assembly" is one of the following: (i) Lower FCU push rod assembly part number (P/N) C6CE1398-7; or (ii) Lower FCU push rod assembly P/N C6CE1398-3 with P/N VSC30-3A rod end bearing installed. Note 1 to paragraph (f)(1): P/N C6CE1398-7 may also be referred to as modification (MOD) 6/2347. (2) For purposes of this AD, a "serviceable FCU push rod assembly" is lower FCU push rod assembly P/N C6CE1398-9. Note 2 to paragraph (f)(2): P/N C6CE1398-9 may also be referred to as MOD 6/2484. (g) Compliance Comply with this AD within the compliance times specified, unless already done. (h) Required Actions (1) Within 125 hours time-in-service (TIS) after the effective date of this AD or within 30 days after the effective date of this AD, whichever occurs first, test each affected FCU push rod assembly for binding and restriction in accordance with the Accomplishment Instructions, paragraphs A.1. through A.3., in Viking DHC-6 Twin Otter Service Bulletin No. V6/0063, Revision A, dated February 1, 2021 (Viking SB V6/0063, Revision A). (i) If there is any binding or restriction, before further flight, remove both affected FCU push rod assemblies from service and install serviceable FCU push rod assemblies in accordance with the Accomplishment Instructions, paragraph A.4., in Viking SB V6/0063, Revision A, and the Accomplishment Instructions, Sections A through C, in Viking DHC-6 Twin Otter Technical Bulletin No. V6/00155, Revision NC, dated September 14, 2020 (Viking TB V6/00155, Revision NC). (ii) If there is no binding and no restriction, before further flight, remove each affected FCU push rod assembly, clean the push rod ends, and inspect each affected FCU push rod assembly for corrosion and condition of the lubricant. Pay particular attention to the bearing ball and race. (A) If there is no corrosion and the lubricant color and texture is normal, before further flight, lubricate each affected FCU push rod assembly in accordance with the Accomplishment Instructions, Section C, in Viking SB V6/0063, Revision A. (B) If there is corrosion or if the lubricant is abnormal in color (too dark) or texture (too sticky), before further flight, remove both affected FCU push rod assemblies from service and install serviceable FCU push rod assemblies in accordance with the Accomplishment Instructions, paragraph A.4, in Viking SB V6/0063, Revision A, and the Accomplishment Instructions, Sections A through C, in Viking TB V6/00155, Revision NC. (2) Repeat the requirements of this AD as follows until both affected FCU push rod assemblies are replaced. (i) Test and lubrication: At intervals not to exceed 125 hours TIS or before further flight anytime the airplane has not been operated for a period of 30 days, whichever occurs first. (ii) Inspection: At intervals not to exceed 1,500 hours TIS. (3) As of the effective date of this AD, do not install an affected FCU push rod assembly on any airplane. (i) Credit for Previous Actions You may take credit for the test, inspection, replacement, and lubrication required by paragraphs (h)(1) and (2) of this AD if you performed those actions before the effective date of this AD using Viking DHC-6 Twin Otter Service Bulletin No. V6/0063, Revision NC, dated June 7, 2019. (j) Alternative Methods of Compliance (AMOCs) (1) 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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (k)(1) of this AD. (2) 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. (k) Related Information (1) For more information about this AD, contact Elizabeth Dowling, Aviation Safety Engineer, New York ACO Branch, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (516) 228-7300; email: elizabeth.m.dowling@faa.gov. (2) Refer to Transport Canada AD CF-2021-42, dated November 26, 2021, for more information. You may examine the Transport Canada AD in the AD docket at https://www.regulations.gov by searching for and locating it in Docket No. FAA-2022-0284. (3) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (l)(3) and (4) of this AD. (l) 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 the AD specifies otherwise. (i) Viking DHC-6 Twin Otter Service Bulletin No. V6/0063, Revision A, dated February 1, 2021. (ii) Viking DHC-6 Twin Otter Technical Bulletin No. V6/00155, Revision NC, dated September 14, 2020. (3) For service information identified in this AD, contact Viking Air Ltd., 1959 de Havilland Way, Sidney British Columbia, Canada V8L 5V5; phone: (800) 663-8444; email: continuing.airworthiness@vikingair.com; website: https://www.vikingair.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call (817) 222-5110. (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: https://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued on May 24, 2022. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-12184 Filed 6-7-22; 8:45 am]BILLING CODE 4910-13-P