Is AD 2013-18840 a recurring Airworthiness Directive?

No — AD 2013-18840 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2013-18840 apply to?

AD 2013-18840 applies to General Electric — models GE90-110B1, GE90-115B, GE90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-18840

one-time

AD 2013-18840 · 2013-08-06 · turbine engine

Airworthiness Directives; General Electric Company Turbofan Engines

What this AD requires

We are superseding emergency airworthiness directive (AD) 2013-14-51 for General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with affected transfer gearbox assembly (TGB) radial gearshafts installed. AD 2013-14-51 was sent previously to all known U.S. owners and operators of GE90-110B1 and GE90-115B turbofan engines. AD 2013-14-51 prohibited operation of an airplane if more than one installed engine has an affected TGB radial gearshaft. This AD contains the same prohibition as AD 2013-14-51 and also prohibits operation of any airplane 60 days after the effective date of this new AD if any installed engine has an affected TGB radial gearshaft. This new AD also revises the applicability by adding GE90- 76B, GE90-77B, GE90-85B, GE90-90B, GE90-94B, and GE90-113B turbofan engine models and adds a mandatory terminating action. This new AD was prompted by reports of three failures of TGB radial gearshafts which resulted in in-flight shutdowns (IFSDs). We are issuing this new AD to prevent failure of the TGB radial gearshaft, which could result in IFSD of one or more engines, loss of thrust control, and damage to the airplane.

Which aircraft AD 2013-18840 applies to

MakesGeneral Electric

ModelsGE90-110B1, GE90-115B, GE90

Source text is preamble/discussion, not a clean applicability paragraph. Affected transfer gearbox (TGB) radial gearshafts are stated to be installed on additional GE90 engine models besides GE90-110B1 and GE90-115B, but those additional models are not named in the source text. AD prohibits operation with affected TGB radial gearshafts installed and adds a mandatory terminating action (install an eligible TGB radial gearshaft)

Whether AD 2013-18840 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 2013-10-52.

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 2013-18840 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.