Airworthiness directives › 2023-18-03
AD 2023-18-03 Airworthiness Directives; Viking Air Limited (Type Certificated Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Models named: DHC-3. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Viking Air Limited (type certificate previously held by Bombardier Inc. and de Havilland, Inc.) Model DHC-3 airplanes, all serial numbers, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 90 days after the effective date of this AD, incorporate into the existing maintenance records required by 14 CFR 91.417(a)(2) or 135.439(a)(2), as applicable for your airplane, the actions and associated thresholds and intervals, including life limits, specified in Parts 2 and 3 of Viking DHC-3 Otter Supplemental Inspection and Corrosion Control Manual, PSM 1-3-5, Revision IR, dated December 21, 2017 (Viking PSM 1-3-5, Revision IR). Do each initial task within 6 months after the effective date of this AD or at the threshold for each applicable task specified in Part 3 of Viking Product Support Manual PSM 1-3-5, Revision IR, whichever occurs later. Where Viking PSM 1-3-5, Revision IR, specifies contacting Viking regarding a component's alloy and heat treat condition, this AD requires contacting the Manager, International Validation Branch, FAA, Transport Canada, or Viking's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. Note 1 to paragraph (g)(1): Viking DHC-3 Otter Service Bulletin V3/0010, Revision NC, dated March 19, 2020, contains additional information related to this AD. (2) After the action required by paragraph (g)(1) of this AD has been done, no alternative actions and associated thresholds and intervals, including life limits, are allowed unless they are approved as specified in paragraph (i) of this AD.
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 describes the unsafe condition as corrosion, wear, and fatigue-related degradation in aging aircraft. The FAA is issuing this AD to detect and address corrosion and cracking. This condition, if not addressed, could lead to structural failure with consequent loss of control of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1