Is AD 2011-21-03 a recurring Airworthiness Directive?

No — AD 2011-21-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-21-03 apply to?

AD 2011-21-03 applies to Boeing — models 777-200, 777-200LR, 777-300, 777-300ER, 777. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-21-03

one-time

Official AD 2011-21-03 · FR doc 2011-25754 · 2011-10-12 · airframe

Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires installing foreign object debris (FOD) rubber shields over the primary and secondary external power connectors for certain airplanes, and wrapping silicone tape around the hydraulic tube for certain other airplanes. This AD was prompted by a report of a fire in the main equipment center due to failure of an external power connector, which caused high-temperature arcing and subsequent splatter of molten copper on an adjacent hydraulic tube, creating a hole in the tube and spraying hydraulic fluid into the power connector, resulting in a fire. In addition there were several reports of overheating or arcing of external power connectors, and one report of a fire due to arcing caused by FOD. We are issuing this AD to prevent FOD from entering the primary and secondary external power connectors, which could result in overheating or arcing and consequent fire in the main equipment center.

Which aircraft AD 2011-21-03 applies to

MakesBoeing

Models777-200, 777-200LR, 777-300, 777-300ER, 777

As identified in Boeing Service Bulletin 777-24-0102, Revision 1, dated June 17, 2010; and Boeing Special Attention Service Bulletin 777-29-0032, dated August 9, 2007.

Whether AD 2011-21-03 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 2011-21-03 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.