AD NUMBER: 2013-08-02

PRODUCT: Boeing Model 777-200, -200LR, -300, and -300ER series airplanes.
SUBJECT: Airworthiness Directive 2013-08-02
ACTION: Final Rule

SUMMARY: The FAA is superseding an existing airworthiness directive (AD) that applies to the product listed above. That AD currently requires repetitive inspections for cracking of the elevator actuator fittings. This new AD requires, for previously modified airplanes, repetitive inspections for movement of the fittings or fastener heads, and eventual replacement of certain bolts (including related investigative and corrective actions if necessary).

For all airplanes, this replacement, with corrected torque values, would terminate the requirements of the existing AD. This new AD also removes certain airplanes from the applicability.

This AD was prompted by the manufacturer's development of a modification that was approved as an optional terminating action to the existing AD's required repetitive inspections. The FAA has been advised that the modification procedures include certain incorrect torque values. The FAA is issuing this AD to detect and correct a cracked actuator fitting or incorrectly installed bolts to the actuator fitting, which could lead to the elevator becoming detached and unrestrained, and a consequent unacceptable flutter condition and loss of control of the airplane.

DATES: This AD is effective May 24, 2013.

FMI: AD