AD NUMBER: PL2008-22-53
MANUFACTURER: MDHI
SUBJECT: Airworthiness Directive PL2008-22-53
SUMMARY: This superseding Emergency Airworthiness
Directive (EAD) is prompted by 4 occurrences on the MD900
helicopters with failed left Vertical Stabilizer Control System
(VSCS) adapter tubes where the vertical stabilizer became
uncontrollable, resulting in reduced yaw control of the
helicopter.