As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - DURING CLIMB-OUT LEFT TANK GRADUALLY INDICATED LOWER FUEL LOW FUEL WARNING AND FUEL IMBALANCE FOLLOWED. CENTER TANK NOTED AT 140 LBS AND THEN 200 LBS LEFT TANK THEN WENT DASHES. AUTO PILOT WAS DISCONNECTED AND NO IMBALANCE WAS NOTED. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. DURING TAXI WENT NORMAL. REMOVED AND REPLACED LT COLLECTOR TANK QUANTITY PROBE IAW 28-41-09-000-801-A01 AND 28-41-09-400-801-A01 OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.