As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUELED ACFT TO 23.1 LBS UPON GETTING NRS FUEL DROPPED TO 22.6. UNABLE TO EXPLAIN LOSS OF 500 LBS. APU RUNNING FOR APPROX 10 MIN. ACFT GROUNDED. LAST 25 LEGS LOGGED TANK 1 DEGRADED. COMPENSATOR DATA BAD. CODE 28-41108. REMOVED COMPENSATOR REF MM TASK 28-41-21-000-801. INSTALLED SERVICEABLE COMPENSATOR REF MM TASK 28-41-21-400-801. BITE TEST OF FUEL QTY SYS REF MM 28-41-00-730-730-801. NO DEFECTS NOTED, CLEARED FLIGHT FAULT HISTORY.