Is AD 2024-06-51 a recurring Airworthiness Directive?

No — AD 2024-06-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2024-06-51

Q: Which aircraft does AD 2024-06-51 apply to?

AD 2024-06-51 applies to General Electric Company — models CT7-2E1, CT7-2F1, CT7-8A, CT7-8E, CT7-8F5, T700-GE-700, T700-GE-701A, T700-GE-701C. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2024-06-51 · FR doc 2024-07438 · 2024-04-08 · turboshaft engine

Airworthiness Directives; General Electric Company Engines, and Various Restricted Category Rotorcraft

What this AD requires

The FAA is superseding airworthiness directive (AD) 2024-05- 51, which applied to certain General Electric Company (GE) Model CT7- 2E1, CT7-2F1, CT7-8A, CT7-8E, and CT7-8F5 engines, and various restricted category helicopters with GE Model T700-GE-700, -701A, - 701C, -701D/CC, -701D, -401, -401C, CT7-2D, or CT7-2D1 engines installed. AD 2024-05-51 required a phase array ultrasonic inspection of the torque reference tube magnetic insert braze joint of the power turbine (PT) drive shaft assembly for inadequate braze coverage, and repair or replacement of the PT drive shaft assembly if necessary. This AD was prompted by at least four reports of failures of the torque reference tube magnetic insert braze joint of the PT drive shaft assembly within the last several months. This AD retains the requirements of AD 2024-05-51 and expands the applicability to include a PT drive shaft assembly part number that was inadvertently omitted. The FAA previously sent an emergency AD to all known U.S. owners and operators of these engines and helicopters and is now issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2024-06-51 applies to

MakesGeneral Electric Company

ModelsCT7-2E1, CT7-2F1, CT7-8A, CT7-8E, CT7-8F5, T700-GE-700, T700-GE-701A, T700-GE-701C, T700-GE-701D/CC, T700-GE-701D, T700-GE-401, T700-GE-401C, CT7-2D, CT7-2D1, CT7, T700

Part-conditional — 5123T91G01, 5123T91G02, 5125T92G01, 5128T51G01.

Applies to CT7 engines with any of the listed PT drive shaft assembly part numbers installed, having less than 100 hours TSN or 100 hours TSR of the torque reference tube, and with an engine, PT module, or PT drive shaft assembly serial number listed in GE ASB CT7-2E1 S/B 72-A0034 (dated Feb 26, 2024) or GE ASB CT7-8 S/B 72-A0118 Rev 01 (dated Feb 26, 2024). Also applies to restricted-category helicopters (Model EH-60A, HH-60L, Sikorsky S-70/S-70A/S-70C/S-70C(M)/S-70C(M1)/S-70M, and UH-60A) with GE Model T700-GE-700, -701A, -701C, -701D/CC, -701D, -401, -401C, CT7-2D, or CT7-2D1 engines installed, where the PT drive shaft assembly was installed after January 1, 2020 and has less than 100 hours TSN or TSR. PT drive shaft assemblies manufactured or repaired after January 1, 2024 are not affected by this AD.

Whether AD 2024-06-51 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 2024-06-51 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.