Airworthiness Directive · Amendment 39-18748 · Flight controls
Viking Air Limited Airplanes
This AD applies to Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-2 Mk. III airplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for all Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-2 Mk. III airplanes that supersedes AD 2016-19-08. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as corrosion of the elevator control rod and of the elevator actuating lever on the control column, which could cause these components to fail. We are issuing this AD to require actions to address the unsafe condition on these products.
Within the next 120 days after October 24, 2016 (the effective date retained from AD 2016-19-08) or within the next 100 hours time-in-service (TIS) after October 24, 2016 (the effective date retained from AD 2016-19-08), whichever occurs first, do the following inspections in accordance with section I. PLANNING INFORMATION, paragraph D. of Viking DHC-2 Beaver Service Bulletin Number: V2/0005, Revision “C”, dated July 17, 2015:
(1) For airplanes with an installed elevator control rod assembly, part number (P/N) C2CF619A, do a detailed visual inspection of P/N C2CF619A for corrosion, cracking, and/or other damages.
(2) For airplanes with an installed elevator control rod assembly, P/N CT2CF1021-1, do a detailed visual inspection of P/N CT2CF1021-1 for corrosion, cracking, and/or other damages.
(3) For all airplanes, do a detailed visual inspection of the elevator actuating lever on the control column and the control column torque tube for corrosion, cracking and/or other damages.
After each initial inspection required in paragraph (g) of this AD, at intervals not to exceed 400 hours TIS, repeat each inspection following section I. PLANNING INFORMATION, paragraph D.2. of Viking DHC-2 Beaver Service Bulletin Number: V2/0005, Revision “C”, dated July 17, 2015.
(1) If corrosion, cracking, or other damages are found during the initial inspection required in paragraph (g)(1) of this AD or any of the repetitive inspections required in paragraph (h) of this AD, before further flight, replace P/N C2CF619A with P/N C2CF619A-11 following section I. PLANNING INFORMATION, paragraph D. of Viking DHC-2 Beaver Service Bulletin Number: V2/0005, Revision “C”, dated July 17, 2015, or contact Viking Air Limited at the address specified in paragraph (q)(4) of this AD for an FAA-approved repair and incorporate the repair.
(2) Within the next 120 days after October 24, 2016 (the effective date retained from AD 2016-19-08) or within the next 100 hours TIS after October 24, 2016 (the effective date retained from AD 2016-19-08), whichever occurs first, you may replace P/N C2CF619A with P/N C2CF619A-11 instead of doing the initial inspection required in paragraph (g)(1) of this AD. Do the replacement following section I. PLANNING INFORMATION, paragraph D. of Viking DHC-2 Beaver Service Bulletin Number: V2/0005, Revision “C”, dated July 17, 2015.
(3) After replacing P/N C2CF619A with P/N C2CF619A-11, you must still do the repetitive inspections of the elevator control rod assemblies as required in paragraph (h) of this AD.
(1) If corrosion, cracking, or other damages are found during the initial inspection required in paragraph (g)(2) of this AD or any of the repetitive inspections required in paragraph (h) of this AD, before further flight, replace the elevator control rod assembly with P/N CT2CF1021-1 that has been inspected and is free of corrosion, cracking, or other damages following section I. PLANNING INFORMATION, paragraph D. of Viking DHC-2 Beaver Service Bulletin Number: V2/0005, Revision “C”, dated July 17, 2015, or contact Viking Air Limited at the address specified in paragraph (q)(4) of this AD for an FAA-approved repair and incorporate the repair.
(2) After replacing or repairing P/N CT2CF1021-1, you must still do the repetitive inspections of the elevator control rod assemblies as required in paragraph (h) of this AD.
If corrosion, cracking, or other damages are found during the initial inspection required in paragraph (g)(3) of this AD and any of the repetitive inspections required in paragraph (h) of this AD, before further flight, contact Viking Air Limited at the address specified in paragraph (q)(4) of this AD for an FAA-approved repair and incorporate the repair.
As of December 22, 2016 (the effective date of this AD), do not install P/N C2CF619A or C2CF619A-9 as a replacement part.
As of October 24, 2016 (the effective date retained from AD 2016-19-08), elevator control rod assemblies, P/N C2CF619A, are life-limited to 15 years and must be replaced with P/N C2CF619A-11, which is not a life-limited part, at the following compliance time:
(1) As of October 24, 2016 (the effective date retained from AD 2016-19-08), if the age of the installed P/N C2CF619A is known, it must be replaced before exceeding the life limit or within the next 12 months after October 24, 2016 (the effective date retained from AD 2016-19-08), whichever occurs later.
(2) As of October 24, 2016 (the effective date retained from AD 2016-19-08), if the age of the installed P/N C2CF619A is not known, it must be replaced within the next 12 months after October 24, 2016 (the effective date retained from AD 2016-19-08).
Credit will be given for the initial inspections required in paragraphs (g)(1) through (3) of this AD if they were done before October 24, 2016 (the effective date retained from AD 2016-19-08) following Viking Air Limited DHC-2 Beaver Service Bulletin Number: V2/0005, Revision `NC', dated March 26, 2012; Viking Air Limited DHC-2 Beaver Service Bulletin Number: V2/0005, Revision `A', dated November 7, 2014; or Viking Air Limited DHC-2 Beaver Service Bulletin Number: V2/0005, Revision `B', dated March 4, 2015.
