Is AD 70-10-04 a recurring Airworthiness Directive?

No — AD 70-10-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 70-10-04 apply to?

AD 70-10-04 applies to Sprague Engineering Applies To All Civil — models 707, 720, 737, 22. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 70-10-04

one-time

AD 70-10-04 · 1970-01-01 · reciprocating engine

Airworthiness Directives; SPRAGUE ENGINEERING: Applies to all Civil Aircraft Certificated in all Categories including, but not Limited to the Boeing Models

Which aircraft AD 70-10-04 applies to

MakesSprague Engineering Applies To All Civil

Models707, 720, 737, 22

Whether AD 70-10-04 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 70-10-04 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.