Is AD 2012-17-04 a recurring Airworthiness Directive?

No — AD 2012-17-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-17-04 apply to?

AD 2012-17-04 applies to Rolls-Royce Plc — models 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, 895-17, RB211-Trent. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-17-04

one-time

Official AD 2012-17-04 · FR doc 2012-21286 · 2012-09-14 · turbine engine

Airworthiness Directives; Rolls-Royce plc Turbofan Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-Trent 800 series turbofan engines. This AD requires removing from service certain intermediate pressure (IP) turbine discs that have a serial number listed in this AD. This AD was prompted by RR performing an evaluation that determined that the current lives for certain IP turbine discs with a steel inclusion may fail before they reach their current mandatory life limits. We are issuing this AD to prevent failure of the IP turbine disc, which could result in uncontained failure of the engine and damage to the airplane.

Which aircraft AD 2012-17-04 applies to

MakesRolls-Royce Plc

Models875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, 895-17, RB211-Trent

Applies only to engines with an intermediate pressure (IP) turbine disc whose serial number is listed in Table 1 to paragraph (e) of the AD (table not included in this excerpt).

Whether AD 2012-17-04 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 2012-17-04 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.