hi
The only consideration that i am aware of is for flight spoilers...if they are operative and pressurization is holding, then it should be ok
If on the other hand the aircraft is dispatched with them inop..the aircraft in our manuals is limited to F315..tht is the level you can desend from without flight spoilers to F100 within the time frame for oxygen available in the event where you loose the other pack and aircraft pressurization is completely lost