AD NUMBER: 2003-16-11
MANUFACTURER: MDHC SUBJECT: Airworthiness Directive 2003-16-11
SUMMARY: This amendment adopts a new airworthiness
directive (AD) for the specified MD Helicopters, Inc. (MDHI) model
helicopters that requires reducing the life limit of the
main rotor drive shaft (drive shaft) and changing
the life limit on the component history card or equivalent record.
This amendment is prompted by the review of final fatigue test
data, which indicates that the life limit of the drive shaft should
be reduced by 2000 hours time-in-service (TIS). The actions
specified by this AD are intended to prevent failure of the drive
shaft, loss of drive of the main rotor system,and subsequent loss
of control of the helicopter.