Is AD 2001-26-11 a recurring Airworthiness Directive?

Yes — AD 2001-26-11 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2001-26-11 apply to?

AD 2001-26-11 applies to Rolls-Royce — models Trent 875, Trent 877, Trent 884, Trent 892, Trent 892B, Trent. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-26-11

recurring

Official AD 2001-26-11 · FR doc 01-31699 · 2001-12-31 · turbine engine

Airworthiness Directives; Rolls-Royce, plc RB211 Trent 800 Series Turbofan Engines

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) that is applicable to Rolls-Royce, plc RB211 Trent 800 series turbofan engines. That AD currently requires initial and repetitive ultrasonic inspections of low pressure compressor (LPC) fan blade roots for cracks, and replacement, if necessary, with serviceable parts. This amendment requires initial inspections at modified thresholds and repetitive inspections at reduced intervals from the current AD using new LPC fan blade inspection criteria, and requires renewal of dry film lubricant on removed blades. This amendment is prompted by reports that an in-service engine experienced LPC fan blade root cracking at a lower life than previously forecast, and, the manufacturer's further investigation that has led to a better understanding of the causes of fan blade root cracking. The actions specified in this AD are intended to prevent LPC fan blade failure due to cracking, which could result in multiple fan blade release, uncontained engine failure, and possible damage to the airplane.

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 2001-26-11 applies to

MakesRolls-Royce

ModelsTrent 875, Trent 877, Trent 884, Trent 892, Trent 892B, Trent

Ultrasonic inspection of LPC fan blade dovetail roots per RR SB RB.211-72-C445 Rev 7; initial/repeat inspection thresholds (cycles-since-new / cycles-since-last-inspection) vary by Trent 875/877/884/892/892B rating per the AD's Table 1.

Whether AD 2001-26-11 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 2001-26-11 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.