Tue, Aug 23, 2016
AD NUMBER: 2016-17-03
PRODUCT: Certain Airbus Model A319 and A320 series airplanes and certain Airbus Model A321 series airplanes.
ACTION: Final Rule
SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2003-25-07 for and AD 2005-13-39 for the airplanes listed above.
AD 2003-25-07 required a revision to the airplane flight manual (AFM) and replacement of both elevator aileron computers (ELACs) having L80 standards with new ELACs having L81 standards. AD 2005-13-39 required a revision to the AFM, replacement of existing ELACs with ELACs having L83 or L91 standards, as applicable; and a concurrent action.
Since AD 2003-25-07 and AD 2005-13-39 were issued, The FAA has determined that new ELAC standards must be incorporated. The ELAC standards have been upgraded to version L97+, which implements enhanced angle-of-attack (AOA) monitoring to better detect AOA blockage, including multiple AOA blockages.
This AD requires replacing existing ELACs with new ELACs having L97+ standards or revising the software in an existing ELAC to the L97+ standards, as applicable, which terminates the requirements of AD 2003-25-07 and AD 2005-13-39. This AD also expands the applicability to include all Airbus Model A318, A319, A320, and A321 series airplanes.
The FAA is issuing this AD to prevent inadvertent activation of the AOA protections. Inadvertent activation of the AOA protections could result in a continuous nose-down pitch rate that could result in reduced controllability of the airplane.
DATES: This AD is effective September 23, 2016.
FMI: AD
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