Airworthiness directives › 2015-20-06
AD 2015-20-06 Airworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Models named: DHC-7-1, DHC-7-100. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all Viking Air Limited (Type Certificate previously held by Bombardier, Inc.) Model DHC-7-1 and DHC-7-100 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 6 months after the effective date of this AD, do a one-time detailed visual inspection for cracking in the outboard nacelles upper longeron channels and angles, in accordance with the Accomplishment Instructions of Viking Air Limited Service Bulletin V7-54-02, Revision NC, dated December 14, 2012. If any cracking is found during the inspection required by this paragraph: Before further flight, repair using a method approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Viking Air Limited's (Type Certificate Previously Held by Bombardier, Inc.) TCCA Design Approval Organization (DAO).
Unsafe condition
This AD was prompted by reports of cracks that were discovered in the outboard nacelles upper longeron channels and angles. We are issuing this AD to detect and correct cracks in the outboard nacelles upper longeron channels and angles, which could lead to the loss of stiffness in the forward engine mount; and possible catastrophic failure.
Affected ADs
None.
Read the original on the Federal Register →
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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