Is AD 2005-20-23 a recurring Airworthiness Directive?

Yes — AD 2005-20-23 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2005-20-23

Q: Which aircraft does AD 2005-20-23 apply to?

AD 2005-20-23 applies to Rolls-Royce — models RB211 Trent 875, RB211 Trent 877, RB211 Trent 884, RB211 Trent 884B, RB211 Trent 892, RB211 Trent 892B, RB211 Trent 895, RB211 Trent. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2005-20-23 · FR doc 05-19845 · 2005-10-04 · turbine engine

Airworthiness Directives; Rolls-Royce plc RB211 Trent 875, 877, 884, 884B, 892, 892B, and 895 Series Turbofan Engines

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211 Trent 875, 877, 884, 892, 892B, and 895 series turbofan engines. That AD currently requires repetitive application of dry film lubricant (DFL) to low pressure compressor (LPC) fan blade roots. This AD requires the same actions but at more frequent intervals than the existing AD. This AD also adds the Trent 884B engine to the list of engine models affected, adds a fan blade part number (P/N) to the affected list of fan blades, and relaxes the initial DFL repetitive application compliance time for certain fan blades that have never been removed from the disk. This AD results from discovering DFL in worse condition than anticipated on fan blades fitted to disks previously run for a significant period. This AD also results from the need to update the list of engine models affected, and to update the list of fan blade part numbers affected. We are issuing this AD to prevent LPC fan blade loss, which could result in an uncontained engine failure and possible aircraft damage.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2005-20-23 applies to

MakesRolls-Royce

ModelsRB211 Trent 875, RB211 Trent 877, RB211 Trent 884, RB211 Trent 884B, RB211 Trent 892, RB211 Trent 892B, RB211 Trent 895, RB211 Trent

Part-conditional — FK30838, FK30840, FK30842, FW12960, FW12961, FW12962, FW13175, FW18548.

Applies only to engines with low pressure compressor (LPC) fan blades of the listed part numbers installed.

Whether AD 2005-20-23 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 2005-20-23 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.