Question re: multi-stage lubrication pump
Good day, hopefully someone with knowledge can answer a question.
On a turbine engine, in a multi-stage lubrication pump - let's say you have a pump with one pressure stage and 4 scavenge stages driven from one drive (shaft) and one of the scavenge stages or elements seizes up, does the whole pump fail (at the pump drive shear point...?) or is there a separate shear point between that failed element or stage gear element and the drive shaft so the pump continues to operate minus that one scavenge stage?
Wordy, hopefully phrasing the question so it can be understood.
Thanks much - TM