Shares of Airbus dropped nearly 9% on Monday after a report alleged a quality issue with fuselage panels in A320-family aircraft, days after the planemaker issued an alert about a software glitch on certain jets.

Airbus shares slumped nearly 9% to € 186.22 at 1:34 pm (CEST) on Monday, December 1, according to data collected from Marketwatch.

The shares dropped after a report by Reuters citing people aware of the development claimed that the fuselage panel issue is delaying some deliveries, but there are no signs it has affected aircraft already in service.