Hi,
Amadeus have advised that the issue has been resolved on their end, see further details below. 
Please advise in case you still encounter any issue with flight searches. 
AUTO-CASCADED FROM MIR 36246463:
Dear Customer,
 
On the 26th of August, multiple customers and monitoring alarms raised
critical incidents for Shopping services shortly after 11:00GMT.
Customers may have experienced errors or response timeouts while
conducting shopping or pricing transactions via shopping services;
specifically, Flex Pricer and Master Pricer through the Amadeus Digital
Commerce channels.
 
Investigations revealed an issue with the related clusters, where
traffic was initially lost in the data center region. Amadeus support
teams initially rerouted the traffic away from the affected server and
redistributed across the remaining data center regions, subsequently
increasing server resources and recycling application processes to
improve performance stability. These actions resulted in the initial
recovery of the incident at 12:26 GMT. However, at 13:27 GMT, a
reoccurrence was observed as the issue began to affect the remaining
regions.
 
Amadeus support teams performed multiple recovery actions in attempt to
make the systems stable including recycling the affected servers,
scaling up PODS, re-balanced clusters, falling back any recent
implementation and also deactivate Master Pricer. Amadeus support teams
reactivated the Flex Pricer traffic in related regions recovering the
impact on Flex Pricer. Master Pricer traffic was gradually reactivated
to avoid any sudden spikes and ensure stability. After the process was
completed, positive outcomes have been observed, with some customers
confirming recovery. Environments will remain under heightened
monitoring, at the moment this incident has been recovered at 00:37 GMT.
 
Regards,
Amadeus Support Center - Support and OPS Analysts.