Is AD 2010-23-20 a recurring Airworthiness Directive?

No — AD 2010-23-20 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2010-23-20 apply to?

AD 2010-23-20 applies to General Electric Company — models CT7-9C, CT7-9C3, CT7. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2010-23-20

one-time

Official AD 2010-23-20 · FR doc 2010-28449 · 2010-11-17 · turboprop engine

Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires inspecting certain serial number (S/N) gas generator turbine (GGT) shafts for nonconforming land balance-cuts, and if found, removing the shaft from service. This AD was prompted by reports of a manufacturing quality problem. We are issuing this AD to detect nonconforming GGT shaft land balance-cuts, which could result in the shaft failing before its published life limit, and which could result in an uncontained engine failure and damage to the airplane.

Which aircraft AD 2010-23-20 applies to

MakesGeneral Electric Company

ModelsCT7-9C, CT7-9C3, CT7

Part-conditional — 6068T44P02.

Applies only to engines with a gas generator turbine (GGT) shaft, P/N 6068T44P02, bearing one of the affected serial numbers listed in Table 1 of this AD (GATHHCPC, GATHHJR7, GATHHJR9, GATHHKG6, GATHHM9R, GATHHWM3, GATHJ4ED, GATHJ9FL, GATHJ19J, GATHJE8P, GATHJWWR, GATHK0KM, GATHK2N1, GATHK3M3, GATHK90K, GATHK96D, GATHKF9R, GATHKH36, GATHKMP7, GATHKRKN, NCE715DA) installed.

Whether AD 2010-23-20 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 2010-23-20 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.