Is AD 01-9018 a recurring Airworthiness Directive?

No — AD 01-9018 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 01-9018 apply to?

AD 01-9018 applies to Learjet — models 24, 25, 28, 29, 31, 35, 36, 55. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 01-9018

one-time

AD 01-9018 · 2001-04-16 · airframe

Airworthiness Directives; Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to all Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 series airplanes. This action requires an inspection to determine if tires on the main landing gear have a certain part number and certain serial numbers, and replacement with a tire having a part number that does not contain those certain serial numbers, if necessary. This action is necessary to prevent separation of the tread of main landing gear tires, which could cause damage to the structure and major systems of the airplane, and consequent reduced controllability of the airplane on the ground during takeoff and landing. This action is intended to address the identified unsafe condition.

Which aircraft AD 01-9018 applies to

MakesLearjet

Models24, 25, 28, 29, 31, 35, 36, 55

certain

Whether AD 01-9018 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 01-9018 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 →Read the full directive (Federal Register)

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.