Is AD 2014-05-31 a recurring Airworthiness Directive?

No — AD 2014-05-31 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2014-05-31 apply to?

AD 2014-05-31 applies to Boeing — models 747-400F, 747-400, 747. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2014-05-31

one-time

Official AD 2014-05-31 · FR doc 2014-05558 · 2014-03-28 · airframe

Airworthiness Directives; The Boeing Company Airplanes

What this AD requires

We are superseding Airworthiness Directive (AD) 2008-08-25 that applied to certain The Boeing Company Model 747-400 and 747-400F series airplanes. AD 2008-08-25 required installing drains and drain tubes to eliminate water accumulation in the drip shield above the M826 cardfile in the main equipment center. This new AD requires installing modified drain tubes, relocating wire bundle routing, installing a new drip shield and drip shield deflectors, and replacing insulation blankets. For certain airplanes, this new AD also concurrently requires sealing the drain slot, installing spuds, and installing drain tubes. This AD was prompted by reports of continued water damage to diode fire card 285U0072-1 in the M826 automatic fire overheat logic test system cardfile following a false FWD CARGO FIRE message, with no change in frequency, which resulted in an air turn back. We are issuing this AD to prevent water from exiting over the edge of the existing drip shield and contaminating electrical components in the M826 cardfile, which could result in an electrical short and potential loss of several functions essential for safe flight.

Which aircraft AD 2014-05-31 applies to

MakesBoeing

Models747-400F, 747-400, 747

747-400F series as identified in Boeing Alert Service Bulletin 747-25A3580, Revision 2, dated May 13, 2013; 747-400 series as identified in Boeing Alert Service Bulletin 747-25A3581, Revision 1, dated June 30, 2011.

Whether AD 2014-05-31 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 2014-05-31 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.