Is AD 2020-01-55 a recurring Airworthiness Directive?

No — AD 2020-01-55 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2020-01-55 apply to?

AD 2020-01-55 applies to General Electric — models GE90-110B1, GE90-115B, GE90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-01-55

one-time

Official AD 2020-01-55 · FR doc 2020-02865 · 2020-02-14 · turbine engine

Airworthiness Directives; General Electric Company Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines. This AD was sent previously as an emergency AD to all known U.S. owners and operators of the GE GE90-110B1 and GE90-115B model turbofan engines with certain engine serial numbers. This AD requires the removal from service of the interstage seal, part number 2505M72P01 or 2448M33P01, from the affected engines. This AD was prompted by a recent event involving an uncontained high-pressure turbine (HPT) failure that resulted in an aborted takeoff. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2020-01-55 applies to

MakesGeneral Electric

ModelsGE90-110B1, GE90-115B, GE90

Serial-conditional — narrows to serials 907150–907150, 907152–907152, 907176–907176, 907179–907179, 907192–907192, 907266–907266, 907270–907270, 907301–907301, 907320–907320, 907337–907337, 907344–907344, 907370–907370, 907371–907371, 907405–907405, 907686–907686, 907687–907687.

Applies only to engines with one of the listed engine serial numbers.

Whether AD 2020-01-55 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 2020-01-55 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.