AD NUMBER: PL2007-09-51
SUBJECT: Airworthiness Directive PL2007-09-51
SUMMARY: This Emergency Airworthiness Directive (AD) is
prompted by a report of an accident after the loss of a tail rotor
blade. This condition, if not corrected, could result in the
failure of a tail rotor blade and subsequent loss of control of the
The FAA has reviewed MD Helicopters ServiceBulletin No.
SB369H-247, SB369D-204, SB369E-099, and SB369F-084, dated April 26,
2007 (SB), which describes procedures for inspecting the tail rotor
blade assembly. The SB states that reports from the field have
shown that there are tail rotor blades in operation with a
The SB further states that these blades have a sharp transition
in the tapered end of the root fitting bore that can cause the tail
rotor blade root fitting to fail.