AD NUMBER: 2015-22-06

PRODUCT: Airbus Model A318, A319, A320, and A321 series airplanes.

ACTION: Final Rule; request for comments

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for the products listed above. This AD was prompted by reports of spoiler and elevator computer (SEC) latent failures; an undetected loss of a SEC in flight will result in loss in redundancy for elevator control.

This AD requires revising the After Start Normal Procedures section of the airplane flight manual (AFM) to provide procedures that will address this loss of redundancy. The FAA is issuing this AD to ensure that the flightcrew has procedures to address loss of redundancy of SEC 1 and SEC 2.

A SEC failure, in conjunction with a loss of trimmable horizontal stabilizer (THS) electrical control due to jamming or rupture, could result in failure of an elevator and aileron computer, and consequent loss of elevator control and reduced control of the airplane.

DATES: This AD becomes effective November 20, 2015. Comments must be received by December 21, 2015.

FMI: AD