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Airworthiness Directive 47-51-15

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AD 47-51-15 · 1947-01-01 · airframe

Airworthiness Directives; DOUGLAS DC-6

Which aircraft AD 47-51-15 applies to

MakesDouglasThe Boeing Company
ModelsDC-6, DC-6A, DC-6B
Serial-conditional — narrows to serials 42854–42880, 42882–42888, 42890–?.

Applies to DC-6 Serial Numbers 42854 through 42880; 42882 through 42888; 42890 [range continues in source but is cut off]. Affected parts identified with two yellow dots. Douglas Service Bulletin DC-6 No. 1 covers the same subject.

Whether AD 47-51-15 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 47-51-15 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

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Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.