More On The Airbus’ A321neo Has a Pitch-Up Issue
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July 19, 2019 - by Bjorn Fehrm for leehamnews.com
- As the AD does not apply to the in-service A320neo, the issue must not be connected to the pitch instability which comes as a natural consequence of mounting the larger neo engines on the A320 series
The European Aviation Safety Agency EASA has issued an Air Worthiness Directive (AD) to instruct operators of the Airbus A321neo of a Pitch instability issue.
EASA writes "excessive pitch attitude can occur in certain conditions and during specific manoeuvres. This condition, if not corrected, could result in reduced control of the aeroplane."
We analyze how this is similar or different to the Boeing 737 MAX pitch instability issues.
A321neo pitch instability
The AD makes clear the issue is connected to a software version of the A321neo Elevator Aileron Computers (ELACs), the Fly-By-Wire computers used for the A320 series control of pitch and roll.
As the AD does not apply to the in-service A320neo, the issue must not be connected to the pitch instability which comes as a natural consequence of mounting the larger neo engines on the A320 series. It can be restricted to how the A321neo version of the ELACs handles the aircraft's controls in an excessive pitch up condition.
Pitch instability from larger engines
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