Is AD 2018-09-07 a recurring Airworthiness Directive?

No — AD 2018-09-07 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-09-07 apply to?

AD 2018-09-07 applies to Rolls-Royce Plc — models Viper Mk. 601-22, Viper. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-09-07

one-time

Official AD 2018-09-07 · FR doc 2018-09913 · 2018-05-09 · turbine engine

Airworthiness Directives; Rolls-Royce plc Turbojet Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for Rolls- Royce plc (RR) Viper Mk. 601-22 turbojet engines. This AD requires removing the oil pump assembly, part number (P/N) V112027, and oil pressure filter, P/N V21264, from service and replacing them with parts eligible for installation. This AD was prompted by a report of an engine failure caused by installation of an incorrect oil filter. We are issuing this AD to correct the unsafe condition on these products.

Which aircraft AD 2018-09-07 applies to

MakesRolls-Royce Plc

ModelsViper Mk. 601-22, Viper

Whether AD 2018-09-07 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 2018-09-07 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.