Is AD 04-26791 a recurring Airworthiness Directive?

No — AD 04-26791 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 04-26791 apply to?

AD 04-26791 applies to Airbus — models A340. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 04-26791

one-time

AD 04-26791 · 2004-12-09 · airframe

Airworthiness Directives; Airbus Model A330 and A340 Series Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Model A330 and A340 series airplanes. This AD requires regularly performing a complete electrical shutdown of the airplane to reset the integrated standby instrument system (ISIS). This AD also provides an optional terminating action. This AD is prompted by reports indicating that an airplane lost the ISIS, then, during the same flight, lost all electronic instrument system (EIS) display units. We are issuing this AD to prevent loss of the ISIS, which, if combined with loss of all EIS display units, could reduce the flightcrew's situational awareness and contribute to loss of control of the airplane or impact with obstacles or terrain.

Which aircraft AD 04-26791 applies to

MakesAirbus

ModelsA340

certain

Whether AD 04-26791 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 04-26791 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.