Is AD 2004-01-20 a recurring Airworthiness Directive?

No — AD 2004-01-20 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2004-01-20

Q: Which aircraft does AD 2004-01-20 apply to?

AD 2004-01-20 applies to Rolls-Royce Plc — models RB211-22B, RB211-524B, RB211-524C2, RB211-524D4, RB211-524G2, RB211-524G3, RB211-524H, RB211-535C. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2004-01-20 · FR doc 04-759 · 2004-01-20 · turbine engine

Airworthiness Directives; Rolls-Royce plc RB211 Series Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce plc (RR) RB211-22B series, RB211-524B, -524C2, -524D4, - 524G2, -524G3, and -524H series, and RB211-535C and -535E series turbofan engines with high pressure compressor (HPC) stage 3 disc assemblies, part numbers (P/Ns) LK46210, LK58278, LK67634, LK76036, UL11706, UL15358, UL22577, UL22578, and UL24738 installed. This AD allows disc assemblies not modified by a certain RR service bulletin to reach their full life only after the disc assemblies are modified with anti-corrosion protection. This AD results from the manufacturer's reassessment of the corrosion risk on HPC stage 3 disc assemblies that have not yet been modified with sufficient application of anti- corrosion protection. We are issuing this AD to prevent corrosion- induced uncontained disc failure, resulting in damage to the airplane.

Which aircraft AD 2004-01-20 applies to

MakesRolls-Royce Plc

ModelsRB211-22B, RB211-524B, RB211-524C2, RB211-524D4, RB211-524G2, RB211-524G3, RB211-524H, RB211-535C, RB211-535E, RB211-22, RB211-524, RB211-535

Part-conditional — LK46210, LK58278, LK67634, LK76036, UL11706, UL15358, UL22577, UL22578.

Applies only to engines with high pressure compressor (HPC) stage 3 disc assemblies bearing the listed part numbers installed. Installed on, but not limited to, Boeing 747, 757, 767, Lockheed L-1011, and Tupolev Tu204 series airplanes.

Whether AD 2004-01-20 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 2004-01-20 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.