As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2149 ON CLIMBOUT THROUGH 8,000 NR 1 OIL PRESSURE GAUGE FELL TO 25 POUNDS MOMENTARILY, THEN TO ZERO. NO ASSOCIATED CAUTION LIGHTS. ALL OTHER INDICATIONS NORMAL. INDICATOR STAYED AT ZERO POUNDS FOR 12 TO 15 MINUTES AND THEN RETURNED TO NORMAL. REMOVED AND REPLACED NR 1 ENGINE OIL PRESSURE TRANSMITTER. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.