As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT AT APPROX 16,000' LT OIL TEMP GAUGE DROPPED TO ZERO ANDS THEN RETURNED TO NORMAL NUMEROUS TIMES. AFTER LEVELING AT 23,000' THE GAUGE DROPPED TO ZERO AND REMAINED THERE UNTIL DESCENDING THROUGH ABOUT 17,000'. GAUGE WAS NOMAL AFTER THAT.