AD NUMBER: PL2008-18-51
MANUFACTURER: MDHI
SUBJECT: Airworthiness Directive PL2008-18-51
SUMMARY: This Emergency Airworthiness Directive (AD) is
prompted by reports that two Model MD900 helicopters experienced
broken Vertical Stabilizer Control System (VSCS) adapter tubes. In
one case, the helicopter experienced uncommanded yaw, resulting in
loss of a window and adoor.