Is AD 03-12843 a recurring Airworthiness Directive?

No — AD 03-12843 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 03-12843 apply to?

AD 03-12843 applies to Raytheon Aircraft Company — models 400A, 400T, 400. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 03-12843

one-time

AD 03-12843 · 2003-05-27 · airframe

Airworthiness Directives; Raytheon Model Beech 400A and 400T Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Model Beech 400A and 400T series airplanes, that requires replacement of the low-pressure oxygen tubing located in the forward fuselage (nose avionics bay), lower forward flight deck, and lower forward cabin areas, as applicable, with new low-pressure oxygen tubing. This action is necessary to prevent leakage of oxygen from scored low-pressure oxygen tubing, which could result in lack of available oxygen for the flightcrew, or possible explosion or fire. This action is intended to address the identified unsafe condition.

Which aircraft AD 03-12843 applies to

MakesRaytheon Aircraft Company

Models400A, 400T, 400

Requires replacement of low-pressure oxygen tubing in the forward fuselage/nose avionics bay and lower forward flight deck/cabin areas per Raytheon SB 35-3406 (Part I for Model 400A, Part II for Model 400T); applies regardless of prior modification/repair, with an AMOC process available.

Whether AD 03-12843 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 03-12843 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.