As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING TAXI OUT L2 WINDOW PAIN STARTED TO CRACK IN MULTIPLE PLACES AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE REPLACED THE L2 SLIDING WINDOW AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 56-11-31.