As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL IMBALANCE AFTER TAKE OFF . NO LEAK SUSPECTED AFTER QRH. GROUNDED - YES. PERFORMED B737-900 FIM TASK 28-41 TASK 801 B. FOUND NO PRESENT FAULT. NO HISTORY FOR 30 DAYS. COMPARED FUEL GAGES AND FUEL STICKS WITH IN LIMITS OF EACH OTHER.