Toulouse, France - Airbus issued an AD (Airworthiness Directive) for a possible "Angle of Attack" issue that may affect the Airbus A320neos.
The directive dated July 31st followed the first AD issued on July 18 for a similar finding in the A321neos.
It was sent to Airbus and all A320neo operators, as both a warning and order.
The AD requires operators to update their Aircraft Flight Manuals and inform all flight crews about the issue. EASA stated that this was an interim precaution and further ADs may follow.
It seems every single-aisle jet from Airbus and Boeing has pitch problems. Fortunately, Airbus didn't find out about it after deadly crashes like the rival Boeing.
But issues that each aircraft faces are significantly different.
According to the information retrieved from Airbus by the popular aviation news portal Simple Flying, there should be a combination of the four conditions for a possible failure with the A320neo, unlike the A321neos.
First, the gravity center of the aircraft must slip towards the back. And then the aircraft must in the process of a continuous deceleration. The plane must also be in the approach or landing phase. Finally, the pilots must perform a dynamic pitch-up maneuver.
Under these circumstances, the plane may face an unwanted pitch-up situation out of the defined limits in the aircraft's manuals.
Unlike the 737 MAXs, the A320 neo allows pilots to manually intervene to stabilize the aircraft.
The MCAS anti-stall prevention system of the 737 MAXs, which was pointed out as the cause of both crashes in Indonesia and Ethiopia, is an automated system inhibiting human intervention during the excessive pitch-up situations.
Boeing has currently been working on a software update to prevent pilots to lose the control of the aircraft in case of false AOA (Angle of Attack) data from the sensors.