Is AD 48-15-03 a recurring Airworthiness Directive?

No — AD 48-15-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 48-15-03 apply to?

AD 48-15-03 applies to Douglas. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 48-15-03

one-time

AD 48-15-03 · 1948-01-01 · airframe

Airworthiness Directives; ) Modify Douglas hydraulic pressure regulator valve P/N 5104005, P/N 5231848, or P/N 5327293 to the equivalent of Douglas regulato

Which aircraft AD 48-15-03 applies to

MakesDouglas

Part-conditional — 5104005, 5231848, 5327293, 5332857.

Compliance is gated to modification/replacement of the specific hydraulic pressure regulator valve part numbers noted in the teaser (alternate equivalents from other suppliers also referenced in the AD) — confirm applicable model from the full AD text before use.

Whether AD 48-15-03 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 48-15-03 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.