Airworthiness Directive 2000-25-04
one-timeAirworthiness Directives; Raytheon (Beech) Model MU-300, MU-300-10, 400, 400A, and 400T Series Airplanes
What this AD requires
This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon (Beech) Model MU-300, MU-300-10, 400, 400A, and 400T series airplanes, that requires a one-time inspection to detect hydraulic fluid leakage from the B-nut area, which attaches a hydraulic tube to the anti-skid valve assembly, and corrective actions, if necessary; and installation of an additional support for the hydraulic tube. This amendment is intended to prevent an asymmetric braking condition and a longer stopping distance due to sudden loss of normal braking to the left wheel. Such loss of normal braking could result in the airplane overrunning the runway surface. This action is intended to address the identified unsafe condition.
Which aircraft AD 2000-25-04 applies to
Applies to airplanes as listed in Raytheon Aircraft Service Bulletin SB 32-3300, dated December 1999, certificated in any category. Addresses potential hydraulic fluid leakage at the B-nut attaching a hydraulic tube to the anti-skid valve assembly.
Whether AD 2000-25-04 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:
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.