Airworthiness Directive E6-12107
one-timeAirworthiness Directives; Raytheon (Beech) Model 400 and 400A Series Airplanes
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for certain Raytheon (Beech) Model 400 and 400A series airplanes. This AD requires, among other actions, reviewing the airplane logbook to determine whether certain generator control unit (GCU) installation kits are installed, and replacing any incorrect GCU. This AD results from reports of over-voltage conditions of the direct current (DC) starter generator. We are issuing this AD to prevent such over-voltage conditions due to the incompatibility between certain GCUs, which could result in the loss of normal electrical power, damage to some electrical components, or blown fuses during flight, and consequent unrecoverable loss of some or all essential equipment.
Which aircraft AD E6-12107 applies to
Applies only to 400 series airplanes (S/N RJ-1 through RJ-65) and 400A series airplanes (S/N RK-1 through RK-23) on which Kit P/N 128-3004-1P or 128-3004-3P (Lucas Aerospace/Goodrich DC Starter Generator) has been incorporated.
Whether AD E6-12107 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.