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Airworthiness Directive 2001-03-06

recurring
Official AD 2001-03-06 · FR doc 01-3672 · 2001-02-15 · airframe

Airworthiness Directives; Raytheon (Beech) Model MU-300, MU-300-10, 400, and 400A Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Raytheon (Beech) Model MU-300, MU-300-10, 400, and 400A series airplanes, that requires repetitive inspections of the bleed air supply tube assemblies for discrepancies; and replacement of the bleed air tube assembly with a new bleed air tube assembly, if necessary. In lieu of accomplishing the repetitive inspections, this AD also provides for a revision of the Airworthiness Limitations to incorporate, among other things, certain inspections and compliance times to detect discrepancies of the subject area; and corrective action, if necessary. This amendment is prompted by reports of broken wire braiding in the bellows assembly of the bleed air supply tube assembly due to premature failure from loading. The actions specified by this AD are intended to prevent the bleed air supply tube assembly from disconnecting and contacting other pneumatic or electrical systems of the airplane or expelling high temperature air on surrounding systems and structure. Such a condition could reduce the functional capabilities of the airplane or the ability of the flight crew to cope with adverse operating conditions.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2001-03-06 applies to

MakesRaytheon
ModelsMU-300-10, 400A, MU-300, 400

To prevent the bleed air supply tube assembly (located within the aft fuselage, connecting to mating ducting in the pylon area) from disconnecting and contacting other pneumatic/electrical systems or expelling high-temperature air: requires general visual inspection for broken wire braiding or ruptured/leaking bellows assemblies, repeated every 400 hours TIS, or incorporation of Airworthiness Limitations per Raytheon Beechjet 400/400A Maintenance Manual Revision B26 Chapter 4 (Model MU-300-10, 400, 400A) or Diamond 1/1A MU-300 Maintenance Requirement Manual Revision 9, Section MR-11-00 (Model MU-300), as applicable.

Whether AD 2001-03-06 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 2001-03-06 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.