Is AD 47-51-16 a recurring Airworthiness Directive?

No — AD 47-51-16 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 47-51-16 apply to?

AD 47-51-16 applies to Douglas — models DC-6. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 47-51-16

one-time

AD 47-51-16 · 1947-01-01 · airframe

Airworthiness Directives; DOUGLAS DC-6

Which aircraft AD 47-51-16 applies to

MakesDouglas

ModelsDC-6

Part-conditional — 2356375-22, 124682-5-12-6, AN960-516, AN310-5, AN380-2-3.

Applies to DC-6 (serial numbers listed in source but cut off before this extract). Requires increasing the strength of the flap support assembly at wing Station 378, replacing temporary rework outlined in Douglas Co. Service Letter of May 12, 1947, using bolts P/N 2356375-22, washers P/N 124682-5-12-6 and AN960-516, nut AN310-5, and cotter pin AN380-2-3. Douglas Service Bulletin DC-6 No. 66 covers the same rework.

Whether AD 47-51-16 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 47-51-16 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.

Look up a tail number →

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.