Is AD 99-26867 a recurring Airworthiness Directive?

No — AD 99-26867 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-26867 apply to?

AD 99-26867 applies to Beechcraft — models 400, 400A, 400T, MU-300-10, MU-300. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-26867

one-time

AD 99-26867 · 1999-10-18 · airframe

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

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Raytheon (Beech) Model 400, 400A, 400T, and MU-300-10 airplanes, that currently requires a revision to the Airplane Flight Manual (AFM) to provide pilots with special operating procedures during icing conditions. This amendment adds a requirement to modify the airplane ice protection system. This amendment also removes Model MU-300 airplanes from the applicability of the existing AD. This amendment is prompted by the development of a modification that will positively address the unsafe condition. The actions specified by this AD are intended to prevent uncommanded nose-down pitch at certain flap settings during icing conditions.

Which aircraft AD 99-26867 applies to

MakesBeechcraft

Models400, 400A, 400T, MU-300-10, MU-300

Applies to Model 400, 400A, MU-300-10, and 400T airplanes. Prevents uncommanded nose-down pitch at certain flap settings during icing conditions. Requires an Airplane Flight Manual (AFM) Limitations/Normal Procedures revision restricting landing flaps to 10 degrees in icing conditions (unless specified RAT conditions are met); within 2 years, Model 400/400A/MU-300-10 airplanes must modify the ice protection system per Beechcraft Service Bulletin No. 2600 (dated November 1995), which terminates the AFM revision requirement, while Model 400T airplanes may accomplish an alternative AFM revision or other specified action.

Whether AD 99-26867 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 94-25-10.

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 99-26867 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.