Is AD E8-21835 a recurring Airworthiness Directive?

No — AD E8-21835 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive E8-21835

Q: Which aircraft does AD E8-21835 apply to?

AD E8-21835 applies to Honeywell International Inc. — models TFE731-4, TFE731-4R, TFE731-5, TFE731-5AR, TFE731-5BR, TFE731-5R, TFE731. Serial/part conditions may narrow it to specific aircraft.

one-time

AD E8-21835 · 2008-09-22 · turbine engine

Airworthiness Directives; Honeywell International Inc. TFE731-4, -4R, -5, -5AR, -5BR, and -5R Series Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. TFE731-4, -4R, -5, -5AR, -5BR, and -5R series turbofan engines, with interstage turbine transition (ITT) duct, part number (P/N) 3075292-1; 3075292-3; 3074766-1; 3077063-1; 3075655- 1; 3075655-2; 3075699-1; or 3075699-3, installed. This AD requires replacing the affected ITT duct with a serviceable and redesigned ITT duct. This AD results from reports of 49 low-pressure turbine (LPT) blade separation events. Six of those events resulted in circumferential failure of the LPT2 or LPT3 nozzle assembly, leading to deformation of the ITT duct and uncontainment of the turbine blades and fragments of the LPT nozzle assembly. We are issuing this AD to prevent uncontainment of turbine blades and fragments of the LPT nozzle assembly, which could result in damage to the airplane.

Which aircraft AD E8-21835 applies to

MakesHoneywell International Inc.

ModelsTFE731-4, TFE731-4R, TFE731-5, TFE731-5AR, TFE731-5BR, TFE731-5R, TFE731

Part-conditional — 3075292-1, 3075292-3, 3074766-1, 3077063-1, 3075655-1, 3075655-2, 3075699-1, 3075699-3.

Applies only to engines with interstage turbine transition (ITT) duct, part number 3075292-1, 3075292-3, 3074766-1, 3077063-1, 3075655-1, 3075655-2, 3075699-1, or 3075699-3, installed. Installed on, but not limited to, Avions Marcel Dassault Mystere-Falcon 50 series, Dassault-Aviation 20, 50, 900, MF900 series, Cessna Model 650, Cessna Citation VII, and Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850XP series airplanes.

Whether AD E8-21835 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 E8-21835 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.