@sensor
The graphic depicted shows estimate that 447 penetrated thunderstorm in upper third, with tops at 50K and above.
AIM 7-1-28 and 7-1-29 come to mind.
An old rule of thumb that was once taught: if going through a T Storm, penetrate in bottom third. Is this still conventional wisdom, prevailing attitude in re thunderstorms (with avoidance being the normal default position ... )
Insofar as considering "going over" a T Storm, a course of action perhaps considered in this case, can the A 330 fly above 50K?
The wiki page entry shows a service ceiling of 41,100 ft. Is that correct?