Airworthiness Directive 2011-12-08
one-timeAirworthiness Directives; Bell Helicopter Textron, Inc. Model 205A, 205A-1, 205B, 212, 412, 412CF, and 412EP Helicopters
What this AD requires
This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron, Inc. (BHT) model helicopters with tail rotor (T[sol]R) blades with certain serial numbers installed. This action requires a one-time inspection of the T[sol]R blade for corrosion or pitting, and repairing or replacing the T[sol]R blade, if that condition is found during the inspection. This amendment is prompted by a report from the manufacturer that T[sol]R blades with certain serial numbers may have manufacturing anomalies in the spar area. These actions are intended to detect corrosion or pitting in the forward spar area of a T[sol]R blade to prevent a crack in the T[sol]R blade, loss of the T[sol]R blade, and subsequent loss of control of the helicopter.
Which aircraft AD 2011-12-08 applies to
Applicability depends on the aircraft’s type certificate — check it against the specific tail.
Whether AD 2011-12-08 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.