A SAAB-340B PILOT NOTICES THE LEFT PROP OIL PRESSURE GAUGE PEGGING AT 200 PSI; THEN DROPPING TO 30 PSI. EIGHT PREVIOUS LOG REPORTS FOR SAME ITEM WERE SIGNED OFF. ACFT FERRIED TO MAINT FACILITY.

Narrative

UPON TAXI OUT; WE NOTICED THE L PROP OIL PRESSURE GAUGE MOVING ERRATICALLY. EVENTUALLY THE INDICATION PEGGED AT 200 PSI AND THEN DOWN TO ABOUT 30 PSI AND EVENTUALLY SETTLED BACK INTO THE NORMAL GREEN ARC. WE RETURNED TO THE GATE AND MADE A LOGBOOK ENTRY AND PROVIDED MAINT CTL WITH A MAINT LOG WRITE-UP. WE WERE PREPARED FOR SOMETHING LIKE THIS SINCE THE SAME DISCREPANCY HAD BEEN WRITTEN UP 8 TIMES SINCE AUGUST. NO DEFECTS NOTICED ON THE WAY TO ZZZ HOWEVER. HAVING THE KNOWLEDGE THAT THIS DISCREPANCY WAS WRITTEN UP AND SIGNED OFF 8 TIMES IN LESS THAN A MONTH IT SEEMS A LITTLE RIDICULOUS. PERHAPS THERE IS AN UNDERLYING PROB AT THE COMPANY OR PERHAPS IT IS AS SIMPLE AS A THORN IN OUR SIDE WITH THIS PARTICULAR AIRPLANE. EITHER WAY; THERE IS DEFINITELY AN ISSUE WITH THIS PARTICULAR ACFT AND THE PROB NEEDS TO BE ADDRESSED AND NOT MASKED WITH A BAND-AID. PROVIDED MAINT LOG WRITE-UP TO MAINT CTL AND GNDED THE ACFT IN AN OUT STATION. PERHAPS IT IS PRESSURE FOR OUR MAINT PERSONNEL TO QUICKLY FIX THINGS TO KEEP ON-TIME PERFORMANCE NUMBERS IN THE GREEN. PERHAPS IT IS JUST AN ANOMALY IN THE SYS OR BAD PARTS. I DON'T REALLY KNOW; ALL I KNOW IS THAT IT WAS WRITTEN UP 8 TIMES PRIOR TO THIS OCCURRENCE. DOES IT REALLY TAKE 8 WRITE-UPS TO GET SOMETHING FIXED PROPERLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATES MOST OF THE PREVIOUS EIGHT LOG SQUAWKS OCCURRED DURING FLIGHT. HE REFUSED THE ACFT FOR FURTHER REVENUE FLIGHT; BUT ENDED UP FERRYING THE SAME ACFT TO THEIR MAINT FACILITY. THE PROP OIL PRESSURE GAUGE CONTINUED TO SHOW ERRATIC PRESSURE READINGS ON THE FERRY FLIGHT. THERE WERE NO OTHER PROP OR ENGINE PERFORMANCE PROBLEMS AND HE BELIEVED THE GAUGE OR SENSOR WAS AT FAULT. REPORTER DOES NOT KNOW THE FINAL FIX FOR THE ERRATIC PROP OIL PRESSURE GAUGE.